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O. Reg. 100/04: Control of Exposure to Biological or Chemical Agents

filed April 21, 2004 under Occupational Health and Safety Act, R.S.O. 1990, c. O.1

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ontario regulation 100/04

made under the

occupational health and safety act

Made: April 14, 2004
Filed: April 21, 2004
Printed in The Ontario Gazette: May 8, 2004

Amending Reg. 833 of R.R.O. 1990

(Control of Exposure to Biological or Chemical Agents)

1. Section 4 of Regulation 833 of the Revised Regulations of Ontario, 1990 is revoked and the following substituted:

4. Without limiting the generality of section 3, but subject to section 9, every employer shall take the measures prescribed in section 3 to limit the exposure of workers to a biological or chemical agent listed in Part 4 or 11 of the Schedule, in accordance with all of the following rules:

1. If Part 4 or 11 sets out a time-weighted average exposure value (TWAEV) for the agent, exposure shall not exceed that value.

2. If Part 4 or 11 sets out a short-term exposure value (STEV) for the agent, exposure shall not exceed that value.

3. If Part 4 or 11 sets out a ceiling exposure value (CEV) for the agent, exposure shall not exceed that value.

4. If Part 4 or 11 sets out a TWAEV for the agent but neither a STEV nor a CEV, exposure shall not exceed the values calculated under Part 2B of the Schedule.

2. (1) The Schedule to the Regulation is amended by striking out “Agents have been assigned to tables given in Parts 4 through 11 of the Schedule and reference should be made to the Index for the Part in which an agent appears” in the first paragraph under the heading “EXPOSURE VALUES FOR BIOLOGICAL AND CHEMICAL AGENTS IN WORKPLACES” and substituting “Agents have been assigned to tables given in Parts 4, 9, 10 and 11 of the Schedule”.

(2) The Schedule to the Regulation is amended by striking out “Reference should be made to the Index for the cross-referencing of common names in IUPAC names” in the second paragraph under the heading “EXPOSURE VALUES FOR BIOLOGICAL AND CHEMICAL AGENTS IN WORKPLACES”.

3. Part 2B of the Schedule to the Regulation is revoked and the following substituted:

PART 2B
EXCURSION LIMITS WHERE NEITHER A SHORT-TERM EXPOSURE VALUE (STEV) NOR A CEILING EXPOSURE VALUE (CEV) IS INDICATED

1. Where a TWAEV but neither a STEV nor a CEV is set out for a biological or chemical agent listed in Part 4 or 11 of this Schedule, a worker shall not be exposed to a concentration of the biological or chemical agent that exceeds,

(a) three times the TWAEV set out in this Schedule with respect to that agent for any period of 30 minutes; and

(b) five times the TWAEV set out in this Schedule with respect to that agent for any period of time.

4. Part 3 of the Schedule to the Regulation is revoked and the following substituted:

PART 3
EXPLANATORY NOTES ON CHEMICAL NAMES, CAS REG. NOS., AND OTHER NOTATIONS

Parts 4, 9, 10 and 11 of this Schedule deal with biological and chemical agents and contain names of the agents, Chemical Abstracts Service Registry Numbers, and some notations.

Chemical Names

The chemical names used in this Schedule conform with nomenclature rules of the International Union of Pure and Applied Chemistry or with common usage.

Numerals and prefixes (e.g.: o-, p-, n-, O-, N-, sec-, tert-) are disregarded when listing the main entries in alphabetical order, but are used to assign the order when main entry names are identical. For example, “N-methylaniline” is listed under “m”, and “sec-butyl acetate” precedes “tert-butyl acetate”.

Chemical Abstracts Service Registry Number

The Chemical Abstracts Service Registry Number (CAS Reg. No.) is a unique numerical identifier assigned to a chemical substance in the CAS registry system by the Chemical Abstracts Service (P.O. Box 3012, Columbus, Ohio, 43210). The CAS Reg. No. itself has no chemical or structural significance; it is merely a computer-verifiable number assigned in sequential order to each agent as it is entered in the CAS registry system. Some of the CAS Reg. Nos. listed in this guide were assigned by the CAS under contract for the United States Environmental Protection Agency (U.S. EPA). CAS Reg. Nos. have been used as chemical or biological identifiers in inventories and computer literature-retrieval systems.

The CAS Reg. No. has the format (xxxxxx-xx-x) and consists of up to 9 digits, separated by hyphens into 3 groups: (a) the first group has up to 6 digits; (b) the second always contains 2 digits; and (c) the third contains 1 digit.

Notations

The notation “inhalable” following the name of an agent in this Schedule means that size fraction of the airborne particulate deposited anywhere in the respiratory tract and collected during air sampling with a particle size-selective device that,

(a) meets the American Conference of Governmental Industrial Hygienists (ACGIH) particle size-selective criteria; and

(b) has the cut point of 100 microns at 50 per cent collective efficiency.

The notation “respirable” following the name of an agent in this Schedule means that size fraction of the airborne particulate deposited in the gas-exchange region of the respiratory tract and collected during air sampling with a particle size-selective device that,

(a) meets the American Conference of Governmental Industrial Hygienists (ACGIH) particle size-selective criteria; and

(b) has the cut point of 4 microns at 50 per cent collective efficiency.

The notation “skin” following the name of an agent in this Schedule indicates that direct or airborne contact with the agents may result in significant absorption of the agent through the skin, mucous membranes or eyes. Vehicles, such as certain solvents, may enhance the rate of skin absorption. Inclusion of this notation is intended to suggest that preventative action should be taken against absorption of the agent through the skin, mucous membranes or eyes.

(As...) — In the lists of biological and chemical agents, the notation “(as...)”, e.g.: “nickel carbonyl (as nickel)”, is used to indicate that the agent is to be analyzed for the substance indicated in parentheses, nickel in this example, rather than nickel carbonyl.

5. (1) Part 4 of the Schedule to the Regulation is revoked and the following substituted:

PART 4
TIME-WEIGHTED AVERAGE EXPOSURE VALUES (TWAEV), SHORT-TERM EXPOSURE VALUES (STEV) AND CEILING EXPOSURE VALUES (CEV)

AGENT	TWAEV		STEV		CEV
(CAS Reg. no)	ppm	mg/m³	ppm	mg/m³	ppm	mg/m³
Acetaldehyde
(75-07-0)					25
Acetic acid
(64-19-7)	10	25	15	37
Acetic anhydride
(108-24-7)					5	21
Acetone
(67-64-1)	500		750
Acetone cyanohydrin
(75-86-5), as CN — Skin					4.7
Acetonitrile
(75-05-8) — Skin	40	67	60	100
Acetophenone
(98-86-2)	10
2-(Acetyloxy) benzoic acid
(50-78-2)		5
Acrolein
(107-02-8)					0.1
Acrylamide
(79-06-1) — Skin		0.03
Acrylic acid
(79-10-7)	2
Adipic acid
(124-04-9)		5
Adiponitrile
(111-69-3) — Skin	2
Aldrin
(309-00-2) — Skin		0.25
Allyl alcohol
(107-18-6) — Skin	0.5
Allyl chloride
(107-05-1)	1	3	2	6
Allyl propyl disulfide
(2179-59-1)	2	12	3	18
alpha-Alumina (total dust)
(1344-28-1)		10
Aluminum-powder
(7429-90-5)		5
Aluminum, alkyl derivatives of
(7429-90-5)		2
Aluminum, metal and oxide dust
(7429-90-5)		10
Aluminum, water-soluble compounds of
(7429-90-5)		2
2-Aminoethanol
(141-43-5)	3	7.5	6	15
2-Aminopyridine
(504-29-0)	0.5	2
3-Amino-1 H-1,2,4-triazole
(61-82-5)		0.2
4-Amino-3,5,6-trichloro-2-pyridinecarboxylic acid
(1918-02-1)		10		20
Ammonia
(7664-41-7)	25	17	35	24
Ammonium chloride fume
(12125-02-9)		10		20
Ammonium perfluoro-octanoate
(3825-26-1)		0.01
Ammonium sulfamate
(7773-06-0)		10
n-Amyl acetate
(628-63-7)	100	530
sec-Amyl acetate
(53496-15-4)	125	660
tert-Amyl methyl ether
(994-05-8)	250	1,045	310	1,295
Aniline and homologues
(62-53-3) — Skin	2	8
Anisidine (sum of o-, and p-isomers)
(29191-52-4) — Skin	0.1	0.5
Antimony and its compounds, including antimony trioxide handling and use, but excluding stibine (as antimony)
(7440-36-0)		0.5
Antimony hydride
(7803-52-3)	0.1	0.5
Arsine
(7784-42-1)	0.05	0.16
Asphalt fumes
(8052-42-4)		5
Atrazine
(1912-24-9)		5
Azinphos-methyl
(86-50-0) — Skin		0.2
Barium carbonate, chloride, nitrate, or oxide (as barium)
(7440-39-3)		0.5
Barium sulfate (total dust)
(7727-43-7)		10
Benomyl
(17804-35-2)	0.8	9
Benzaldehyde
(100-52-7)			4	17
1,2-Benzenedicarboxylic acid bis(2-ethylhexyl) ester
(117-81-7)		3		5
Benzenethiol
(108-98-5)	0.5	2.2
Benzotrichloride
(98-07-7) — Skin					0.1
Benzoyl chloride
(98-88-4)					0.5
Benzoyl peroxide
(94-36-0)		5
Benzyl acetate
(140-11-4)	10
Benzyl chloride
(100-44-7)	1	5
Beryllium and its compounds (as beryllium)
(7440-41-7)		0.002		0.01
Biphenyl
(92-52-4)	0.2	1.3
Bis(eta-cyclopentadienyl)iron
(102-54-5)		10
2,6-Bis(1,1-dimethylethyl)-4-methylphenol
(128-37-0)		10
Bis(2-(dimethylaminoethyl)) ether
(3033-62-3)	5	33
Bis(dimethylthiocarbonyl) disulfide
(137-26-8)		1
Bismuth telluride
(1304-82-1)		10
Bismuth telluride, selenium-doped
(1304-82-1)		5
Borates, tetra, sodium salts
(1303-96-4)
- Anhydrous		1
- Decahydrate		5
- Pentahydrate		1
Boron oxide
(1303-86-2)		10
Boron tribromide
(10294-33-4)					1	10
Boron trifluoride
(7637-07-2)					1	2.8
Bromacil
(314-40-9)		10
Bromine
(7726-95-6)	0.1		0.2
Bromine pentafluoride
(7789-30-2)	0.1	0.7
Bromochloromethane
(74-97-5)	200	1,060	250	1,320
Bromoform
(75-25-2) — Skin	0.5	5
Bromotrifluoromethane
(75-63-8)	1,000	6,085
1,3-Butadiene
(106-99-0)	5
Butane
(106-97-8)	800	1,900
1-Butanethiol
(109-79-5)	0.5	1.8
2-Butanone
(78-93-3)	200	590	300	885
2-Butoxyethanol
(111-76-2) — Skin	20
2-Butoxyethyl acetate
(112-07-02) — Skin	25	164	75	492
(Butoxymethyl) oxirane
(2426-08-6)	25	133
n-Butyl acetate
(123-86-4)	150	710	200	950
sec-Butyl acetate
(105-46-4)	200	950
tert-Butyl acetate
(540-88-5)	200	950
n-Butyl acrylate
(141-32-2)	2
n-Butyl alcohol
(71-36-3) — Skin					50	150
sec-Butyl alcohol
(78-92-2)	100	303	150	454
tert-Butyl alcohol
(75-65-0)	100	303	150	454
n-Butyl lactate
(138-22-7)	5	30
n-Butylamine
(109-73-9) — Skin					5	15
o-sec-Butylphenol
(89-72-5) — Skin	5	31
p-tert-Butyltoluene
(98-51-1)	1
tert-Butyl chromate, (as chromate)
(1189-85-1) — Skin						0.1
Cadmium, elemental
(7440-43-9), and compounds, as Cd		0.01
Cadmium, elemental
(7440-43-9), and compounds, as Cd, respirable		0.002
Calcium carbonate, including marble (total dust)
(471-34-1)		10
Calcium chloride
(10043-52-4)		5
Calcium chromate
(13765-19-0), as Cr		0.001
Calcium cyanamide
(156-62-7)		0.5
Calcium hydroxide
(1305-62-0)		5
Calcium oxide
(1305-78-8)		2
Calcium silicate (total dust)
(1344-95-2)		10
Calcium sulfate, including plaster of Paris (total dust)
(10101-41-4)		10
Camphor
(76-22-2)	2	12	3	19
Caprolactam, vapour and aerosol
(105-60-2)	0.25	1
Captafol
(2425-06-1) — Skin		0.1
Captan
(133-06-2)		5
Carbofuran
(1563-66-2)		0.1
Carbon black
(1333-86-4)		3.5
Carbon dioxide
(124-38-9)	5,000	9,000	30,000	54,000
Carbon disulfide
(75-15-0) — Skin	10	31
Carbon monoxide
(630-08-0)	35	40	400	460
Carbon tetrabromide
(558-13-4)	0.1	1.4	0.3	4.1
Carbon tetrachloride
(56-23-5) — Skin	2	13	3	19
Carbonyl chloride
(75-44-5)	0.1	0.4
Carbonyl fluoride
(353-50-4)	2	5.4	5	13
Cellulose (paper fibre, total dust)
(9004-34-6)		10
Cesium hydroxide
(21351-79-1)		2
Charcoal, except activated
(16291-96-6)		10
Chloroacetaldehyde
(107-20-0)					1	3
Chlordane
(57-74-9) — Skin		0.5		2
Chlorinated diphenyl oxides
(55720-99-5)		0.5		2
Chlorine
(7782-50-5)	0.5		1
Chlorine dioxide
(10049-04-4)	0.1	0.3	0.3	0.9
Chlorine trifluoride
(7790-91-2)					0.1	0.4
Chloroacetone
(78-95-5)					1
Chloroacetyl chloride
(79-04-9)	0.05		0.15
Chlorobenzene
(108-90-7)	10
o-Chlorobenzaldehyde
(89-98-5)			4	23
o-Chlorobenzylidene malononitrile
(2698-41-1) — Skin					0.05	0.4
2-Chloro-1,3-butadiene
(126-99-8) — Skin	10	36
Chlorodifluoromethane
(75-45-6)	1,000	3,535	1,250	4,415
1-Chloro-2,3-epoxypropane
(106-89-8) — Skin	0.5
2-Chloroethanol
(107-07-3) — Skin					1	3.3
p-Chloronitrobenzene
(100-00-5)	0.1	0.6
1-Chloro-1-nitropropane
(600-25-9)	2	10
Chloropentafluoroethane
(76-15-3)	1,000	6,315
2-Chloro-1-phenylethanone
(532-27-4)	0.05	0.32
2-Chloropropionic acid
(598-78-7) — Skin	0.1
o-Chlorostyrene
(2039-87-4)	50	283	75	425
o-Chlorotoluene
(95-49-8)	50	260	75	388
2-Chloro-6-(trichloro-methyl)pyridine
(1929-82-4)		10		20
Chlorpyrifos
(2921-88-2) — Skin		0.2		0.6
Chromates, dichromates and other hexavalent chromium compounds (as chromium)
(7440-47-3)		0.05
Chromium
(7440-47-3), insoluble Cr VI compounds, as Cr		0.01
Chromium metal, and divalent and trivalent chromium compounds (as chromium)
(7440-47-3)		0.5
Chromyl chloride
(14977-61-8)	0.025	0.16
Clopidol
(2971-90-6)		10		20
Coal dust, Anthracite (respirable)		0.4
Coal dust, Bituminous (respirable)		0.9
Coal tar pitch volatiles (as total benzene-soluble compounds)
(65996-93-2)		0.2
Cobalt carbonyl and hydrocarbonyl (as cobalt)
(7440-48-4)		0.1
Cobalt metal, dust and fume (as cobalt)
(7440-48-4)		0.02
N-Coco morpholine
(1541-81-7) — Skin	5	52
Copper fume (as copper)
(7440-50-8)		0.2
Copper dust and mists (as copper)
(7440-50-8)		1
Cotton dust, fabric knitting		0.5
Cotton dust, raw		0.2(F)
Cotton dust, slashing and weaving		0.75(F)
Cotton dust, waste		0.5(F)
‘Coumin 100’ Polymer Flakes (total dust)
(63393-89-5)		5
Cresol (sum of o-, m-, and p-isomers)
(1319-77-3) — Skin	5	22
Crotonaldehyde
(4170-30-3)					0.3
Crufomate
(299-86-5)		5		20
Cumene
(98-82-8) — Skin	50	245
Cyanamide
(420-04-2)		2
Cyanogen
(460-19-5)	10	21
Cyanogen chloride
(506-77-4)					0.3	0.75
Cyclohexane
(110-82-7)	300	1,030
Cyclohexanol
(108-93-0) — Skin	50	200
Cyclohexanone
(108-94-1) — Skin	25	100
Cyclohexene
(110-83-8)	300	1,010
Cyclohexylamine
(108-91-8)	10	40
Cyclopentadiene
(542-92-7)	75	200
Cyclopentane
(287-92-3)	600	1,720
Cyhexatin
(13121-70-5)		5
Cymene (sum of o-,m- and p-isomers)
(25155-15-1) — Skin	50	274
Decaborane
(17702-41-9) — Skin	0.05	0.25	0.15	0.75
Demeton
(8065-48-3) — Skin	0.01	0.11
1,2-Diaminoethane
(107-15-3)	10	25
Diatomaceous earth, (uncalcined) inhalable
(61790-53-2)		10(D)
Diatomaceous earth (uncalcined) respirable
(61790-53-2)		3(D)
Diazomethane
(334-88-3)	0.2	0.34
Diborane
(19287-45-7)	0.1	0.11
Dibromodifluoromethane
(75-61-6)	100	860
2-(Dibutylamino) ethanol
(102-81-8) — Skin	0.5
Dibutyl phenyl phosphate
(2528-36-1) — Skin	0.3
Dibutyl phosphate
(107-66-4)	1	8.6	2	17
Dibutyl phthalate
(84-74-2)		5
o-Dichlorobenzene
(95-50-1)	25		50
p-Dichlorobenzene
(106-46-7)	10
Dichlorodifluoromethane
(75-71-8)	1,000	4,940
1,4-Dichloro-2-butene
(764-41-0) — Skin	0.005
1,3-Dichloro-5,5-dimethyl-hydantoin
(118-52-5)		0.2		0.4
1, 3-Dichloro-2-Propanol
(96-23-1) — Skin			1	5
1,1-Dichloroethane
(75-34-3)	100
1,2-Dichloroethane
(107-06-2)	10	40
1,1-Dichloroethene
(75-35-4)	1	4	20	80
1,2-Dichloroethene
(540-59-0)	200	790	250	990
Dichloroethyne
(7572-29-4)					0.1	0.4
Dichlorofluoromethane
(75-43-4)	10	42
Dichloromethane
(75-09-2)	50	175
1,1-Dichloro-1-nitroethane
(594-72-9)	2	12
(2,4-Dichlorophenoxy) acetic acid and its esters (as 2,4-D)
(94-75-7)		10
2-(2,4-Dichlorophenoxy) ethanol hydrogen sulfate sodium salt
(136-78-7)		10
1,2-Dichloropropane
(78-87-5)	75	350	110	510
1,3-Dichloropropene
(542-75-6) — Skin	1	5
2,2-Dichloropropionic acid
(75-99-0)	1	6
1,2-Dichloro-1,1,2,2-tetra-fluoroethane
(76-14-2)	1,000	6,985
Dichlorvos
(62-73-7) — Skin	0.1	0.9
Dicrotophos
(141-66-2) — Skin		0.25
Dicyclopentadiene
(77-73-6)	5	27
Dieldrin
(60-57-1) — Skin		0.25
Diethanolamine
(111-42-2)		2
Diethylamine
(109-89-7)	5		15
2-Diethylaminoethanol
(100-37-8) — Skin	2
Diethylene glycol monoethyl ether
(111-90-0)	30	165
Diethylenetriamine
(111-40-0) — Skin	1	4
Diethyl phthalate
(84-66-2)		5
1,2-Dihydroxybenzene
(120-80-9)	5	22
1,4-Dihydroxybenzene
(123-31-9)		2
Diisodecyl phthalate
(26761-40-0)		5
Diisopropylamine
(108-18-9) — Skin	5	20
Dimethoxymethane
(109-87-5)	1,000	3,110
N,N-Dimethylacetamide
(127-19-5) — Skin	10	36
Dimethylamine
(124-40-3)	5		15
3-(Dimethylamino) propylamine
(111-90-0) — Skin	0.5	2
N,N-Dimethylaniline
(121-69-7) — Skin	5	25	10	50
ar,ar-Dimethylbenzenamine (sum of all isomers)
(1300-73-8) — Skin	0.5
Dimethylbenzene (sum of o-, m- and p-isomers)
(1330-20-7)	100	435	150	650
N, N-Dimethyl-cyclohexylamine
(98-94-2)			5	26
Dimethylethoxysilane
(14857-34-2)	0.5		1.5
N, N-Dimethyl-ethanolamine
(108-01-0)	3	11	6	22
N,N-Dimethylformamide
(68-12-2) — Skin	10	30
2,6-Dimethyl-4-heptanone
(108-83-8)	25	145
1,1-Dimethylhydrazine
(57-14-7) — Skin	0.01
2-(2,2-Dimethyl-1-oxopropyl)-H-indene-1,3(2H)-dione
(83-26-1)		0.1
Dimethyl phthalate
(131-11-3)		5
Dimethyl sulfate
(77-78-1) — Skin	0.1	0.5
Dimethyl terephthalate
(120-61-6)		5
Dimethyl 2,3,5,6-tetracholorotere-phthalate
(1861-32-1)		5
Dinitrobenzene (sum of m-, o-, and p-isomers:
(99-65-0), (528-29-0), and (100-25-4)) — Skin	0.15	1.0
Dinitro-o-cresol
(534-52-1) — Skin		0.2
Dinitrotoluene (sum of all isomers)
(25321-14-6) — Skin		0.2
1,4-Dioxane
(123-91-1) — Skin	20
Dioxathion
(78-34-2) — Skin		0.2
N,N-Diphenylamine
(122-39-4)		10
Dipropylene glycol monomethyl ether
(34590-94-8)	100	605	150	910
Dipropylene glycol monomethyl ether acetate
(88917-22-0)	100	776	150	1,164
Diquat
(2764-72-9) — Skin		0.5
Diquat, respirable
(2764-72-9) — Skin		0.1
Disulfiram
(97-77-8)		2
Disulfoton
(298-04-4)		0.1
Diuron
(330-54-1)		10
m-Divinylbenzene
(108-57-6)	10	53
Emery (total dust)
(1302-74-5)		10
Endosulfan
(115-29-7) — Skin		0.1
Endrin
(72-20-8) — Skin		0.1
Enflurane
(13838-16-9)	2	16
1,2-Epoxy-4-(epoxyethyl)-cyclohexane
(106-87-6) — Skin	0.1
1,2-Epoxypropane
(75-56-9)	20	47
2,3-Epoxy-1-propanol
(556-52-5)	2
Ethanethiol
(75-08-1)	0.5	1.3
Ethanol
(64-17-5)	1,000	1,900
Ethion
(563-12-2) — Skin		0.4
Ethoxyethane
(60-29-7)	400	1,210	500	1,515
2-Ethoxyethanol
(110-80-5) — Skin	5	18
2-Ethoxyethyl acetate
(111-15-9) — Skin	5	27
Ethyl acetate
(141-78-6)	400	1,440
Ethyl acrylate
(140-88-5) — Skin	5		15
Ethylamine
(75-04-7)	5		15
Ethylbenzene
(100-41-4)	100	435	125	540
Ethyl bromide
(74-96-4)	5
Ethyl chloride
(75-00-3)	100
Ethyl cyanoacrylate
(7085-85-0)	0.2
Ethyl-3-ethoxy propionate
(763-69-9)	50	300
Ethylene glycol
(107-21-1)						100
Ethylene glycol dimethyl ether
(110-71-4) — Skin	5	18
Ethylene glycol dinitrate
(628-96-6) — Skin	0.05	0.31
Ethylene glycol mono-n-propyl ether
(2807-30-9) — Skin	25	110
Ethylene glycol mononitrate
(16051-48-2) — Skin	0.05	0.22
5-Ethylidene-2-norbornene
(16219-75-3)					5	25
Ethylenimine
(151-56-4) — Skin	0.5	0.9
Ethyl formate
(109-94-4)	100	300
Ethyl methacrylate
(97-63-2)	100	470
N-Ethylmorpholine
(100-74-3) — Skin	5	23
O-Ethyl O-p-nitrophenyl phenylphosphonothioate
(2104-64-5) — Skin		0.1
Ethyl silicate
(78-10-4)	10	85
Fenamiphos
(22224-92-6) — Skin		0.1
Fensulfothion
(115-90-2)		0.1
Fenthion
(55-38-9) — Skin		0.1
Ferbam
(14484-64-1)		10
Ferrovanadium dust
(12604-58-9)		1		3
Fluorides (as fluoride)
(16984-48-8)		2.5
Fluorine
(7782-41-4)	1	1.6	2	3.1
Fonofos
(944-22-9) — Skin		0.1
Forane
(26675-46-7)	2	15
Formaldehyde
(50-00-0)	1	1.5	2	3
Formamide
(75-12-7) — Skin	10	15
Formic acid
(64-18-6)	5		10
Furfural
(98-01-1) — Skin	2	8
Furfuryl alcohol
(98-00-0) — Skin	10	40	15	60
Gasoline
(8006-61-9)		900		1,500
Germanium tetrahydride
(7782-65-2)	0.2	0.63
Glycerin mist
(56-81-5)		10
Glutaraldehyde
(111-30-8), activated and inactivated					0.05
Grain dust (oats, wheat, barley)		4
Grain dust, not otherwise classified (total dust)		4
Graphite (all forms except graphite fibres), respirable
(7782-42-5)		2
Gypsum (total dust)
(10101-41-4)		10
Hafnium
(7440-58-6)		0.5
Halothane
(151-67-7)	2	16
Heptachlor
(76-44-8) and Heptachlor epoxide (1024-57-3) — Skin		0.05
n-Heptane
(142-82-5)	400	1,635	500	2,045
2-Heptanone
(110-43-0)	25	115
3-Heptanone
(106-35-4)	50		75
4-Heptanone
(123-19-3)	50	233
Heptyl acetate
(90438-79-2)	50	320
Hexachlorobenzene
(118-74-1) — Skin		0.002
Hexachloro-1,3-butadiene
(87-68-3) — Skin	0.02	0.21
Hexachlorocyclopentadiene
(77-47-4)	0.01	0.11
Hexachloroethane
(67-72-1)	1
Hexachloronaphthalene
(1335-87-1) — Skin		0.2
Hexafluoroacetone
(684-16-2) — Skin	0.1	0.7
Hexahydro-1,3,5-trinitro-1,3,5-triazine
(121-82-4) — Skin		0.5
Hexamethylenetetramine (HMT)
(100-97-0)			0.35	2
n-Hexane
(110-54-3)	50	176
Hexane, other isomers of	500	1,760	1,000	3,520
1,6-Hexanediamine
(124-09-4)	0.5
2-Hexanone
(591-78-6)	1	4
1-Hexene
(592-41-6)	30
sec-Hexyl acetate
(142-92-7)	50	294
Hexyl acetate (isomeric mixture)
(88230-35-7)	50	294
Hexylene glycol
(107-41-5)					25	120
Hydrazine
(302-01-2) — Skin	0.01
Hydrogenated terphenyls¹
(61788-32-7)	0.5
Hydrogen bromide
(10035-10-6)					3	10
Hydrogen chloride
(7647-01-0)					5	7.4
Hydrogen cyanide and Cyanide salts, as CN
Hydrogen cyanide
(74-90-8) — Skin					4.7
Calcium cyanide
(592-01-8) — Skin						5
Potassium cyanide
(151-50-8) — Skin						5
Sodium cyanide
(143-33-9) — Skin						5
Hydrogen fluoride (as fluoride)
(7664-39-3)					3	2.5
Hydrogen peroxide
(7722-84-1)	1	1.4
Hydrogen selenide (as selenium)
(7783-07-5)	0.05	0.16
Hydrogen sulfide
(7783-06-4)	10	14	15	21
4-Hydroxy-4-methyl-2-pentanone
(123-42-2)	50	240	75	360
2-Hydroxypropyl acrylate
(999-61-1) — Skin	0.5	2.7
Indene
(95-13-6)	10	47
Indium and its compounds (as indium)
(7440-74-6)		0.1
Iodine
(7553-56-2)					0.1	1
Iodoform
(75-47-8)	0.6	10
Iron oxide dust and fumes (Fe₂O₃), as Fe
(1309-37-1)		5
Iron pentacarbonyl (as iron)
(13463-40-6)	0.1	0.8	0.2	1.6
Iron salts, water-soluble (as iron)
(7439-89-6)		1
Isoamyl acetate
(123-92-2)	100	530
Isoamyl alcohol
(123-51-3)	100	360	125	450
Isobutyl acetate
(110-19-0)	150	710	187	887
Isobutyl alcohol
(78-83-1)	50	150
Isooctyl alcohol
(26952-21-6) — Skin		270
2-Isopropoxyethanol
(109-59-1)	25	105
Isopropyl acetate
(108-21-4)	250	1,040	310	1,295
Isopropyl alcohol
(67-63-0)	400	980	500	1,225
Isopropylamine
(75-31-0)	5	12	10	24
Isopropylaminoethanols			400	1,900
N-Isopropylaniline
(768-52-5) — Skin	2	11
Isosorbide dinitrate
(87-33-2) — Skin		0.2
Kaolin (respirable)
(1332-58-7)		2(D)
Kerosene, straight-run (8008-20-6) and hydrosulfurized
(64742-81-0)	35	250
Ketene
(463-51-4)	0.5	0.9	1.5	2.6
L.P.G. (Liquified petroleum gas)
(68476-85-7)		1,800
Lead chromate
(7758-97-6), as Cr		0.012
Limestone (total dust)
(1317-65-3)		10(D)
Lincomycin
(154-21-2)		0.1
Lindane
(58-89-9) — Skin		0.5
Lithium hydride
(7580-67-8)		0.025
Lithium hydroxide, Anyhydrous
(1310-65-2)				1
Lithium hydroxide, Monohydrate
(1310-66-3)				1
Magnesite (total dust)
(546-93-0)		10(D)
Magnesium oxide fume
(1309-48-4)		10
Malathion
(121-75-5) — Skin		10
Maleic anhydride
(108-31-6)	0.25	1
Manganese, dust and compounds (as manganese)
(7439-96-5)		5
Manganese-containing fume (as manganese)
(7439-96-5)		1		3
Manganese cyclo-pentadienyltricarbonyl (as manganese)
(12079-65-1) — Skin		0.1
Manganese tetroxide (as manganese)
(1317-35-7) — Skin		1
Mesityl oxide
(141-79-7)	15	60	25	100
Methacrylic acid
(79-41-4)	20	70
Methanethiol
(74-93-1)	0.5	1
Methanol
(67-56-1) — Skin	200	260	250	325
Methomyl
(16752-77-5)		2.5
Methoxychlor
(72-43-5)		10
2-Methoxyethanol
(109-86-4) — Skin	5	16
2-Methoxyethyl acetate
(110-49-6) — Skin	5	24
Methoxyflurane
(76-38-0)	2	13
4-Methoxyphenol
(150-76-5)		5
1-Methoxy-2-propanol
(107-98-2)	100	365	150	550
Methyl acetate
(79-20-9)	200	605	250	755
Methyl acetylene-propadiene mixture
(MAPP)	1,000		1,250
Methyl acrylate
(96-33-3) — Skin	2
Methylamine
(74-89-5)	5		15
N-Methylbenzenamine
(100-61-8) — Skin	0.5	2.2
Methylbenzene
(108-88-3)	50
Methyl bromide
(74-83-9) — Skin	1
3-Methyl-2-butanone
(563-80-4)	200	705
Methyl chloride
(74-87-3)	50	103	100	205
Methyl 2-cyanoacrylate
(137-05-3)	0.2
Methylcyclohexane
(108-87-2)	400	1,600
2-Methylcyclohexanol
(583-59-5)	50	233
2-Methylcyclohexanone
(583-60-8) — Skin	50	230	75	345
2-Methylcyclopentadienyl-manganese tricarbonyl (as manganese)
(12108-13-3) — Skin		0.2
Methyl demeton
(8022-00-2) — Skin		0.5
2-Methyl-3,5-dinitrobenzamide
(148-01-6)		5		10
Methylene bis (4-cyclohexyl isocyanate)
(5124-30-1)	0.005
4,4´-Methylene bis (2-chloroaniline)
(101-14-4) — Skin	0.0005	0.005
4,4´-Methylene-dianiline
(101-77-9) — Skin		0.04
((1-Methylethoxy)methyl)-oxirane
(4016-14-2)	50	237	75	356
Methyl ethyl ketone peroxides					0.2	1.5
Methyl formate
(107-31-3)	100	245	150	370
5-Methyl-3-heptanone
(541-85-5)	25	130
5-Methyl-2-hexanone
(110-12-3)	50	233
Methylhydrazine
(60-34-4) — Skin	0.01
Methyl iodide
(74-88-4) — Skin	2	12
Methyl methacrylate
(80-62-6)	100	410
Methyl parathion
(298-00-0) — Skin		0.2
4-Methyl-2-pentanol
(108-11-2) — Skin	25	104	40	167
4-Methyl-2-pentanone
(108-10-1)	50	205	75
2-Methyl-2-propenenitrile
(126-98-7) — Skin	1	2.7
N-Methyl-2-pyrrolidone
(872-50-4)		400
alpha-Methylstyrene
(98-83-9)	50	241	100	482
Methyl tert-butyl ether (MTBE)
(1634-04-4)	40
1-Methyl-2,4,6-trinitrobenzene
(118-96-7) — Skin	0.01	0.1	0.02	0.2
Methyl vinyl ketone
(78-94-4) — Skin					0.2
Metribuzin
(21087-64-9)		5
Mevinphos
(7786-34-7) — Skin	0.01	0.1	0.03	0.3
Mica, respirable
(12001-26-2)		3(D)
Mineral Spirits		525
Molybdenum metal, dioxide and disulfide (as molybdenum)
(7439-98-7)		10
Molybdenum trioxide and molybdates (as molybdenum)
(7439-98-7)		5
Monocrotophos
(6923-22-4)		0.25
Morpholine
(110-91-8) — Skin	20	70	30	105
Naled
(300-76-5) — Skin		3
Naphthalene
(91-20-3)	10	52	15	78
1-Naphthyl N-methyl-carbamate
(63-25-2)		5
alpha-Naphthylthiourea
(86-88-4)		0.3
Nepheline syenite (total dust)
(37244-96-5)		10
Nickel carbonyl (as nickel)
(13463-39-3)	0.05	0.35
Nickel, elemental/metal
(7440-02-0), inhalable		1
Nickel, insoluble compounds, as Ni, inhalable
(7440-02-0)		0.2
Nickel, soluble compounds, as Ni, inhalable
(7440-02-0)		0.1
Nickel subsulfide, inhalable
(12035-72-2), as Ni		0.1
Nicotine
(54-11-5) — Skin		0.5
Nitramine
(479-45-8) — Skin		1.5
Nitric acid
(7697-37-2)	2	5	4	10
Nitric oxide
(10102-43-9)	25	31
p-Nitroaniline
(100-01-6) — Skin		3
Nitrobenzene
(98-95-3) — Skin	1	5
Nitroethane
(79-24-3)	100	306
Nitrogen dioxide
(10102-44-0)	3	5.6	5	9.4
Nitrogen trifluoride
(7783-54-2)	10	29
Nitroglycerine
(55-63-0) — Skin	0.05	0.5
Nitromethane
(75-52-5)	20
1-Nitropropane
(108-03-2)	25	90
2-Nitropropane
(79-46-9)	1	35	20	70
Nitrotoluene (sum of m-, o-, and p-isomers:
(99-08-1), (88-72-2), and (99-99-0)) — Skin	2	11
Nitrous oxide
(10024-97-2)	25	45
Nonane
(111-84-2)	200	1,050
Octachloronaphthalene
(2234-13-1) — Skin		0.1		0.3
Octane
(111-65-9)	300	1,400	375	1,750
Oil, mineral — Mist
(8012-95-1)		5		10
Osmium tetroxide (as osmium)
(20816-12-0)	0.0002	0.002	0.0006	0.006
Oxalic acid
(144-62-7)		1		2
1,1´-Oxybisbenzene
(101-84-8)	1	7	2	14
1,1´-Oxybis(2-chloroethane)
(111-44-4) — Skin	5	29	10	58
Oxybis (chloromethane)
(542-88-1)	0.001	0.005
2,2´-(Oxybis(methylene))-bisoxirane
(2238-07-5)	0.1	0.53
2,2´-Oxybis(propane)
(108-20-3)	250	1,045	310	1,295
Oxygen difluoride
(7783-41-7)					0.05	0.1
Ozone
(10028-15-6)	0.1	0.2	0.3	0.6
Paraffin wax fume
(8002-74-2)		2
Paraquat
(1910-42-5)		0.1
Parathion
(56-38-2) — Skin		0.05
Particulates (insoluble) Not Otherwise Classified (PNOC)
- inhalable particulate		10(D)
- respirable particulate		3(D)
Penicillin (total dust)
(1406-05-9)		0.1
Pentaborane
(19624-22-7)	0.005	0.013	0.015	0.039
Pentachloronaphthalene
(1321-64-8)		0.5
Pentachloronitrobenzene
(82-68-8)		0.5
Pentachlorophenol
(87-86-5) — Skin		0.5
Pentaerythritol (total dust)
(115-77-5)		10
Pentaerythritol tetrabenzoate
(4196-86-5)				2
Pentane
(109-66-0)	600	1,770	750	2,210
2-Pentanone
(107-87-9)	200	700	250	880
3-Pentanone
(96-22-0)	200		300
Perchloryl fluoride
(7616-94-6)	3	13	6	25
Perlite (a)		10(D)
Perfluoroisobutylene
(382-21-8)					0.01
Persulfates, ammonium (7727-54-1), sodium (7775-27-1) and potassium persulfates (7727-21-1)		0.1
Petroleum ether		500
Petroleum coke (total dust)
(64741-79-3)		3.5(A)
Phenol
(108-95-2) — Skin	5	19
Phenothiazine
(92-84-2) — Skin		5
2-Phenoxyethanol
(122-99-6) — Skin	25	141
(Phenoxymethyl)oxirane
(122-60-1)	0.1
o-Phenylenediamine
(95-54-5)		0.1
m-Phenylenediamine
(108-45-2)		0.1
p-Phenylenediamine
(106-50-3) — Skin		0.1
Phenylhydrazine
(100-63-0) — Skin	0.1
Phenylphosphine
(638-21-1)					0.05	0.23
Phorate
(298-02-2) — Skin		0.05		0.2
Phosphine
(7803-51-2)	0.3	0.4	1	1.4
Phosphoric acid
(7664-38-2)		1		3
Phosphorothionic acid 0,0-diethyl 0-(6-methyl)-2-(1-methylethyl)-4-pyrimidinyl)ester
(333-41-5) — Skin		0.1
Phosphorus (yellow or white)
(7723-14-0)		0.1
Phosphorus oxychloride
(10025-87-3)	0.1	0.6	0.5	3
Phosphorus pentachloride
(10026-13-8)	0.1	0.85
Phosphorus pentasulfide
(1314-80-3)		1		3
Phosphorus trichloride
(7719-12-2)	0.2	1.1	0.5	2.8
Phthalic anhydride
(85-44-9)	1	6
m-Phthalodinitrile
(626-17-5)		5
Piperazine dihydrochloride
(142-64-3)		5
Platinum metal
(7440-06-4)		1
Platinum, water-soluble compounds of, including chloroplatinates (as platinum)
(7440-06-4)		0.002
Polychlorinated biphenyls (PCBs)¹		0.05
Portland cement (total dust)
(65997-15-1)		10(D)
Potassium hydroxide
(1310-58-3)						2
Poultry dust (total dust)		5
Precipitated silica (total dust)
(1309-37-1)		10
Propane
(74-98-6)	2,500
Propargyl alcohol
(107-19-7) — Skin	1	2.3
((2-Propenyloxy) methyl) oxirane
(106-92-3) — Skin	1
beta-Propiolactone
(57-57-8)	0.5	1.5
Propionic acid
(79-09-4)	10	30
Propoxur
(114-26-1)		0.5
n-Propyl acetate
(109-60-4)	200	830	250	1,040
n-Propyl alcohol
(71-23-8) — Skin	200	490	250	615
1,2-Propylene glycol dinitrate
(6423-43-4) — Skin	0.05	0.34
1,2-Propylene glycol, total vapour & aerosol
(57-55-6)	50	155
1,2-Propylene glycol, aerosol only
(57-55-6)		10(C)
Propylene glycol monomethyl ether acetate
(108-65-6)	50	270
Propylenimine
(75-55-8) — Skin	2	4.7
n-Propyl nitrate
(627-13-4)	25	105	40	170
Propyne
(74-99-7)	1,000	1,635	1,250	2,045
Pyrethrum
(8003-34-7)		5
Pyridine
(110-86-1)	5	16
Quinone
(106-51-4)	0.1	0.44
Resorcinol
(108-46-3)	10	45	20	90
Rhodium, metal and water-insoluble compounds of (as rhodium)
(7440-16-6)		1
Rhodium, water-soluble compounds of, including chloride, nitrate, and sulfate (as rhodium)
(7440-16-6)		0.01
Ronnel
(299-84-3)		10
Rosin core solder pyrolysis products (as formaldehyde)		0.1
Rotenone (commercial)
(83-79-4)		5
Rouge (total dust)
(1309-37-1)		10(D)
Rubber solvent¹		1,600
Selenium and its compounds except selenium hexafluoride and hydrogen selenide (as selenium)
(7782-49-2)		0.2
Selenium hexafluoride (as selenium)
(7783-79-1)	0.025	0.1
Shellac dust (total dust)
(9000-59-3)		10
Silane
(7803-62-5)	5	6.6
Silica fume, respirable
(69012-64-2)		2
Silica fused, respirable
(60676-86-0)		0.1
Silica gel
(112926-00-8)		10
Silicon (total dust)
(7440-21-3)		10
Silicon carbide (total dust)
(409-21-2)		10(D)
Silver, metal
(7440-22-4)		0.1
Silver, water-soluble compounds of (as silver)
(7440-22-4)		0.01
Sisal dust (total dust)		2
Soap dust
(68918-36-5)		5
Soapstone, total dust		6(D)
Soapstone, respirable		3(D)
Sodium azide
(26628-22-8)					0.1	0.26
Sodium bisulfite
(7631-90-5)		5
Sodium fluoroacetate
(62-74-8) — Skin		0.05		0.15
Sodium hydroxide
(1310-73-2)						2
Sodium metabisulfite
(7681-57-4)		5
Spectinomycin		2
Starch (total dust)
(9005-25-8)		10
Stearates (total dust)		10
Stoddard solvent¹
(8052-41-3)		525
140 Degree C Flash Aliphatic Solvent, Type of Stoddard Solvent		525
Strontium chromate, as Cr
(7789-06-2)		0.0005
Strychnine
(57-24-9)		0.15
Styrene*
(100-42-5)	50	213	200	852
Sucrose (total dust)
(57-50-1)		10
Subtilisins (proteolytic enzymes as 100% pure crystalline enzyme)
(9014-01-1)						0.00006
Sulfometuron methyl
(74222-97-2)		5
Sulfur dioxide
(7446-09-5)	2	5.2	5	10.4
Sulfur hexafluoride
(2551-62-4)	1,000	5,970
Sulfur monochloride
(10025-67-9)					1	6
Sulfur pentafluoride
(5714-22-7)					0.01	0.1
Sulfur tetrafluoride
(7783-60-0)					0.1	0.4
Sulfuric acid
(7664-93-9)		1		3
Sulfuryl fluoride
(2699-79-8)	5	21	10	42
Sulprofos
(35400-43-2)		1
Synthetic Vitreous Fibres (Man made Mineral Fibres)
- Continuous filament glass fibres	1f/cc
- Continuous filament glass fibres, inhalable		5
- Glass wool fibres	1f/cc
- Rock wool fibres	1f/cc
- Slag wool fibres	1f/cc
- Special purpose glass fibres	1f/cc
- Synthetic vitreous fibres, not otherwise classified (excluding fibrous glass dust and mineral wool fibre)	1f/cc(E)
Talc (containing no asbestos fibres), respirable
(14807-96-6)		2(D)
Talc (containing fibres other than those of asbestos and tremolite asbestos)		2f/cc(B)
Tantalum, metal and oxide (total dust)
(7440-25-7)		10
Tellurium and its compounds except tellurium hexafluoride (as tellurium)
(13494-80-9)		0.1
Tellurium hexafluoride (as tellurium)
(7783-80-4)	0.01	0.1
Temephos
(3383-96-8)		10
Terephthalic acid
(100-21-0)		10
Terphenyls (sum of o-, m-, and p-isomers)
(84-15-1), (92-06-8), (92-94-4)					0.5	4.7
1,1,2,2-Tetrabromoethane
(79-27-6)	1	14
1,1,1,2-Tetrachloro-2,2-difluoroethane
(76-11-9)	500	4,165
1,1,2,2-Tetrachloro-1,2-difluoroethane
(76-12-0)	500	4,165
1,1,2,2-Tetrachloroethane
(79-34-5) — Skin	1	7
Tetrachloroethylene
(127-18-4)	25		100
Tetrachloronaphthalene
(1335-88-2)		2
Tetrachlorophathalic anhydride
(117-08-8)		0.1
Tetrachlorophenol
(25167-83-3) — Skin		0.5
Tetraethyl dithiono-pyrophosphate
(3689-24-5) — Skin		0.2
Tetraethyl pyrophosphate
(107-49-3) — Skin	0.004	0.047
Tetrahydrofuran
(109-99-9)	200	590	250	735
Tetramethoxysilane
(681-84-5)	1	6.2
Tetramethylsuccino-dinitrile
(3333-52-6) — Skin	0.5	2.8
Tetranitromethane
(509-14-8)	0.005
Tetrasodium pyrophosphate
(7722-88-5)		5
Thallium, water-soluble compounds of (as thallium)
(7440-28-0) — Skin		0.1
4,4´-Thiobis(6-tert-butyl-m-cresol)
(96-69-5)		10
Thioglycolic acid
(68-11-1) — Skin	1	3.8
Thionyl chloride
(7719-09-7)					1	5
Tin, metal, oxide and inorganic compounds of, except stannane (as tin)
(7440-31-5)		2
Tin, organic compounds of (as tin)
(7440-31-5) — Skin		0.1
Titanium dioxide (total dust)
(13463-67-7)		10
Toluidine (sum of o-, m- and p-isomers:
(95-53-4), (108-44-1), and (108-49-0)) — Skin	2	9
Toxaphene¹
(8001-35-2) — Skin		0.5		1
Tributyl phosphate
(126-73-8)	0.2	2.2
Trichloroacetic acid
(76-03-9)	1	6.7
1,2,4-Trichlorobenzene
(120-82-1)					5	37
1,1,1-Trichloro-2,2-bis-(p-chlorophenyl)ethane
(50-29-3)		1
1,1,1-Trichloroethane
(71-55-6)	350	1,910	450	2,455
1,1,2-Trichloroethane
(79-00-5) — Skin	10	55
Trichloroethylene
(79-01-6)	50		100
Trichlorofluoromethane
(75-69-4)					1,000	5,600
Trichloromethane
(67-66-3)	10	49
Trichloromethanesulfenyl chloride
(594-42-3)	0.1	0.8
Trichloronaphthalene
(1321-65-9) — Skin		5
Trichloronitromethane
(76-06-2)	0.1	0.67	0.3	2
(2,4,5-Trichlorophenoxy) acetic acid and esters of (as 2,4,5-T)
(93-76-5)		10
1,2,3-Trichloropropane
(96-18-4) — Skin	10	60
1,1,2-Trichloro-1,2,2-trifluoroethane
(76-13-1)	1,000	7,650	1,250	9,560
Tri-ortho-cresyl phosphate
(78-30-8) — Skin		0.1
Triethanolamine
(102-71-6)	0.5	3.1
Triethylamine
(121-44-8)	1		3
Triethylenediamine
(280-57-9) — Skin	1	4.6
Triethylenetetramine
(112-24-3) — Skin	0.5	3
1,3,5-Triglycidyl-s-triazinetrione
(2451-62-9)		0.05
3,5,5-Trimethyl-2-cyclohexen-1-one
(78-59-1)					5	28
Trimellitic anhydride
(552-30-7)						0.04
Trimethoxyvinylsilane
(2768-02-7)			10	60
Trimethylamine
(75-50-3)	5		15
Trimethylbenzene (sum of isomers)
(25551-13-7)	25	123
Trimethyl phosphite
(121-45-9)	2	10
2,4,6-Trinitrophenol
(88-89-1) — Skin		0.1		0.3
Triphenyl amine
(603-34-9)		5
Triphenyl phosphate
(115-86-6)		3
Trixylylphosphate
(25155-23-1)		0.1
Tungsten, water-insoluble compounds of (as tungsten)
(7440-33-7)		5		10
Tungsten, water-soluble compounds of, including tungstic acids, phosphotungstic acids and their salts (as tungsten)
(7440-33-7)		1		3
Turpentine
(8006-64-2)		560
Uranium (natural) and its compounds (as uranium)
(7440-61-1)		0.2		0.6
V.M.& P. Naphtha¹
(8030-30-6)		1,350
n-Valeraldehyde
(110-62-3)	50	175
Vanadium respirable dust and fume (as vanadium pentoxide)
(1314-62-1)		0.05
Vegetable oils (mists) except mists of irritant oils such as oils of castor and cashew nut		10
Vinyl acetate
(108-05-4)	10		15
Vinyl bromide
(593-60-2)	0.5
4-Vinyl cyclohexene
(100-40-3)	0.1
Vinyl fluoride
(75-02-5)	1
Vinylidene fluoride
(75-38-7)	500
Vinyltoluene (mixture of m- and p-isomers)
(25013-15-4)	50	241	100	482
Warfarin
(81-81-2)		0.1
Welding fume, not otherwise specified
Aluminum-containing (as aluminum)
(7429-90-5)		5
Iron-containing (as iron)
(7439-89-6)		5
Other, not otherwise classified (total weight, oil free)		5
Wheat flour dust (total dust)		3
Wood dust
- certain hardwoods as beech and oak		1
- softwood		5		10
m-Xylene-alpha, alpha'-diamine
(1477-55-0) — Skin						0.1
Yttrium, metal and compounds (as yttrium)
(7440-65-5)		1
Zinc chromates,
(13530-65-9;11103-86-9;37300-23-5) as Cr		0.01
Zinc chloride fume
(7646-85-7)		1		2
Zinc oxide dust (total dust)
(1314-13-2)		10
Zinc oxide fume
(1314-13-2)		5		10
Zirconium compounds (as zirconium)
(7440-67-7)		5		10

* Special exceptions may apply to this substance; see section 9 of the regulation.

Footnotes

(A) Provided that the total dust contains less than 0.7% vanadium.

(B) Provided that the respirable dust concentration does not exceed 2 mg/m³.

(C) For assessing the visibility in a work environment where 1,2-propylene glycol aerosol is present.

(D) The value is for particulate matter containing no asbestos and less than 1% crystalline silica.

(E) A secondary limit of 5 mg/m³ (total dust) is recommended to deal with dusty operations where fibre counts are usually difficult to determine. Where both types of measurements are made simultaneously, the more restrictive limit should be used to assess the exposures.

(F) As measured by the vertical elutraitor, cotton-dust sampler.

¹ As sum of components assayed by chromatographic procedure with reference to the bulk sample.

(2) Part 4 of the Schedule to the Regulation is amended by striking out the following item:

Manganese, dust and compounds (as manganese)
(7439-96-5)		5

(3) Part 4 of the Schedule to the Regulation is amended by adding the following item:

Manganese, dust and compounds (as manganese)
(7439-96-5)		0.2

(4) Part 4 of the Schedule to the Regulation is amended by striking out the following items:

1, 3-Butadiene
(106-99-0)	5

. . . . .

Carbon monoxide
630-08-0)	35	40	400	460

(5) Part 4 of the Schedule to the Regulation is amended by adding the following items:

1, 3-Butadiene
(106-99-0)	2

. . . . .

Carbon monoxide
(630-08-0)	25	29	100	115

6. (1) Part 10 of the Schedule to the Regulation is amended by striking out the following item:

N-Nitrosamines — Skin (e.g. NNitrosodimethylamine)

(a)

(2) Part 10 of the Schedule to the Regulation is amended by adding the following item:

N-Nitrosamines — Skin (e.g. NNitrosodimethylamine)

7. (1) Part 11 of the Schedule to the Regulation is revoked and the following substituted:

PART 11
EXPOSURE VALUES* FOR ACRYLONITRILE, BENZENE AND MERCURY

Agent (CAS Reg. No.)	TWAEV		STEV		CEV
Agent (CAS Reg. No.)	ppm	mg/m³	ppm	mg/m³	ppm	mg/m³
Acrylonitrile (107-13-1)	2	4.3			10	21.5
Benzene (71-43-2)	1		5.0
Mercury
- All forms of except alkyl (as mercury) (7439-97-6) — Skin		0.025
- Alkyl compounds of (as mercury) (7439-97-6) — Skin		0.01		0.03

* The values listed in this part apply to workplaces to which the designated substance regulation does not apply.

(2) Part 11 of the Schedule to the Regulation is amended by striking out the following item:

Benzene	1		5.0
(71-43-2)

(3) Part 11 of the Schedule to the Regulation is amended by adding the following item:

Benzene	0.5		2.5
(71-43-2)

8. (1) Subject to subsections (2) and (3), this Regulation comes into force on the day it is filed.

(2) Subsections 5 (2) and (3) come into force on June 30, 2004.

(3) Subsections 5 (4) and (5) and subsections 7 (2) and (3) come into force on December 31, 2005.

O. Reg. 100/04: Control of Exposure to Biological or Chemical Agents

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