
1 

(1) These Regulations may be cited as the Control of Substances Hazardous to Health (Amendment) Regulations 1991 and shall come into force on 1st January 1992.
(2) In these regulations, unless the context otherwise requires, “the principal Regulations” means the Control of Substances Hazardous to Health Regulations 1988().
2 

(1) At the end of regulation 4 of the principal Regulations there shall be inserted the following paragraph–“
(4) A person shall not supply during the course of or for use at work, benzene or any substance containing benzene unless its intended use is not prohibited by item 11 of Schedule 2.”.
(2) For Schedule 1 to the principal Regulations there shall be substituted the Schedule set out in Schedule 1 to these Regulations.
(3) Schedule 2 to the principal Regulations shall be amended as follows–
(a) in item 1 in column 1, for “exceeding 0.1 per cent” there shall be substituted “equal to or greater than 0.1 per cent.”;
(b) at the end of the Schedule there shall be inserted the additional item set out in Schedule 2 to these Regulations.
3 
The Control of Substances Hazardous to Health (Amendment) Regulations 1990() are revoked.
Signed by order of the Secretary of State.
Eric Forth
Parliamentary Under Secretary of State,
Department of Employment
15th October 1991
SCHEDULE 1
Regulation 2(2)

SCHEDULE 1
Regulations 2(1), 7(4) and 12(2)

The maximum exposure limits of the dusts included in the list below refer to the toinhalable dust fraction, unless otherwise stated.

Substance Formula Reference periods
Long-term maximum exposure limit (8-hour TWA reference period) Short-term maximum exposure limit (10-minute reference period)
ppm mg m−3 ppm mg m−3
Acrylamide CH2=CHCONH2 — 0.3 — —
Acrylonitrile CH2=CHCN 2 4 — —
Arsenic and compounds except arsine (as As) As — 0.1 — —
Benzene C6H6 75 15 — —
Buta-1,3-diene CH2=CHCH=CH2 10 22 — —
2-Butoxyethanol C4H9OCH2CH2OH 25 120 — —
Cadmium and cadmium compounds, except cadmium oxide fume and cadmium sulphide pigments (as Cd) Cd — 0.05 — —
Cadmium oxide fume (as Cd) CdO — 0.05 — 0.05
Cadmium sulphide pigments (respirable dust as Cd) CdS — 0.04 — —
Carbon disulphide CS2 10 30 — —
Chromium (VI) compounds (as Cr) Cr — 0.05 — —
1,2–Dibromoethane (Ethylene dibromide) BrCH2CH2Br 0.5 4 — —
Dichloromethane CH2Cl2 100 350 — —
2,2'–Dichloro–4,4'–methylene dianiline (MbOCA) CH2(C6H3ClNH2)2 — 0.005 — —
2-Ethoxyethanol C2H5OCH2CH2OH 10 37 — —
2-Ethoxyethyl acetate C2H5OCH2CH2OOCCH3 10 54 — —
Ethylene oxide CH2CH2O 5 10 — —
Formaldehyde HCHO 2 2.5 2 2.5
Grain dust  — 10 — —
Hydrogen cyanide HCN — — 10 10
Isocyanate, all (as-NCO)  — 0.02 — 0.07
Man-made mineral fibre  — 5 — —
2-Methoxyethanol CH3OCH2CH2OH 5 16 — —
2-Methoxyethyl acetate CH3COOCH2CH2OCH3 5 24 — —
Nickel and its inorganic compounds (except nickel carbonyl): Ni — — — —

 water-soluble nickel compounds (as Ni)  — 0.1 — —

 nickel and water-insoluble nickel compounds (as Ni)  — 0.5 — —
Rubber process dust  — 8 — —
Rubber fume  — 0.6 — —
Silica, respirable crystalline SiO2 — 0.4 — —
Styrene C6H5CH=CH2 100 420 250 1,050
1,1,1-Trichlorotehane CH3CCl3 350 1,900 450 2,450
Trichloroethylene CCl2=CHCl 100 535 150 802
Vinyl chloride CH2=CHCl 7 — — —
Vinylidene chloride CH2=CCl2 10 40 — —
Wood dust (hard wood)  — 5 — —




SCHEDULE 2
Regulation 2(3)(b)


 1 2
Item No. Description of substance Purpose for which the substance is prohibited
11. Benzene and any substance containing benzene in a concentration equal to or greater than 0.1 per cent, other than
(a) motor fuels covered by Council Directive 85/210/EEC (OJ No L96, 3.4.1985, p. 25)
(b) waste covered by Council Directives 75/442/EEC (OJ No L194, 25.7.1975, p. 39) and 78/319/EEC (OJ No L84, 31.3.78, p. 43). Use for all purposes except use in industrial processes, and for the purposes of research, development and analysis.