# The Control of Substances Hazardous to Health (Amendment) Regulations 1990, Schedule THE: SCHEDULE TO BE SUBSTITUTED AS SCHEDULE 1 TO THE PRINCIPAL REGULATIONS


SCHEDULE 1
LIST OF SUBSTANCES ASSIGNED TO MAXIMUM EXPOSURE LIMITS
Regulations 2(1), 7(4)and 12(2)
The maximum exposure limits of the dusts included in the list below refer to the total inhalable dust fraction, unless otherwise stated.
Reference periods
Long-term maximum exposure limit (8-hour TW A reference period)
Short-term maximum exposure limit (10-minute reference period)
Substance
Formula
ppm
mg m−3
ppm
mg m−3
Acrylamide
CH2=CHCONH2
—
0.3
—
—
Acrylonitrile
CH2=CHCN
2
4
—
—
Arsenic & compounds except arsine (as As)
As
—
0.1
—
—
Benzene
C6H7sub6;
5
15
—
—
Buta-1,3-diene
CH2=CHCH=CH2
10
22
—
—
2-Butoxyethanol
CH4H9OCH2CH2OH
25
120
—
—
Cadmium & 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
—
—
1,2-Dibromoethane (Ethyl dibromide)
BrCG2CH2Br
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
Hydrogen cyanide
HCN
—
—
10
10
Isocyanates, all (as-NCO)
—
0.02
—
0.07
Man-made mineral fibre
—
5
—
—
2-Methoxyethanol
CH3OCH2CH2OH
5
16
—
—
2-Methoxyethyl acetate
CH3COOCH2CH2OCH3
5
24
—
—
Rubber process dust
—
8
—
—
Rubber fume
—
0.6
—
—
Styrene
C6H5CH=CH2
100
420
250
1050
1,1,1-Trichloroethane
CH3CCl3
350
1900
450
2450
Trichloroethylene
CCl2=CHCl
100
535
150
802
Vinyl chloride
CH2=CHCl
7
—
—
—
Vinylidene chloride
CH2=CCl2
10
40
—
—
Wood dust (hard wood)
—
5
—
—

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Source: https://www.legislation.gov.uk/uksi/1990/2026/schedule (the official version)
Page: https://openlegislation.uk/control-of-substances-hazardous-to-health-amendment-regulations-1990/schedule
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.