Statutory Instrument 1994 No. 3246
The Control of Substances Hazardous to Health Regulations 1994- continued

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SCHEDULE 1
Regulations 2(1), 7(6) and 12(2)

LIST OF SUBSTANCES ASSIGNED MAXIMUM EXPOSURE LIMITS


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 TWA reference period) Short-term maximum exposure limit (15-minute reference period)
Substance Formula ppm mg m-3 ppm mg m-3

(001) In addition to the maximum exposure limit specified above man-made mineral fibre is also subject to a maximum exposure limit of 2 fibres ml-1, 8-hour TWA, when measured or calculated by a method approved by the Health and Safety Commission. back

(002) Limit relates to cyclohexane soluble material. back<.p>

(003) In addition to the maximum exposure limit specified above vinyl chloride is also subject to an overriding annual exposure limit of 3 ppm. back
Acrylamide CH2=CHCONH2 — 0.3 — —
Acrylonitrile CH2=CHCN 2 4 — —
Arsenic & compounds except arsine (as As) As — 0.1 — —
Benzene C6H6 5 16 — —
Beryllium and beryllium compounds (as Be) Be — 0.002                      
Bis (chloromethyl) ether C1CH2OCH2C1 0.001 0.005 — —
Buta-1, 3-diene CH2=CHCH=CH2 10 22 — —
2-Butoxyethanol C4H9OCH2CH2OH 25 120 — —
Cadmium & cadmium compounds, except cadmium oxide fume, cadmium sulphide and cadmium sulphide pigments (as Cd) Cd — 0.025 — —
Cadmium oxide fume (as Cd) CdO — 0.025 — 0.05
Cadmium sulphide and cadmium sulphide pigments (respirable dust as Cd) CdS — 0.04 — —
Carbon disulphide CS2 10 30 — —
Chromium (VI) compounds (as Cr) Cr — 0.05 — —
Cobalt and cobalt compounds (as Co) Co — 0.1 — —
1,2-Dibromoethane (Ethylene dibromide) BrCH2CH2Br 0.5 4 — —
1,2-Dichloroethane (Ethylene dichloride) C1CH2CH2C1 5 20 — —
Dichloromethane CH2C12 100 350 300 1050
2,2'-Dichloro-4,4'-methylene dianiline (mboca) CH2(C6H3C1NH2)2 — 0.005 — —
1-Chloro-2,3-epoxypropane (Epichlorohydrin)

    Uksi_19943246_en_001.gif

 0.5 2 1.5 6
2-Ethoxyethanol C2H5OCH2CH2OH 10 37 — —
2-Ethoxyethyl acetate C2H5OCH2CH2OOCCH3 10 54 — —
Ethylene oxide

    Uksi_19943246_en_002.gif

 5 10 — —
Formaldehyde HCHO 2 2.5 2 2.5
Grain dust            — 10 — —
Hydrogen cyanide HCN — — 10 10
Isocyanates, all (as-NCO)            — 0.02 — 0.07
Man-made mineral fibre(001)  — 5 — —
2-Methoxyethanol CH3OCH2CH2OH 5 16 — —
2-Methoxyethyl acetate CH3COOCH2CH2OCH3 5 24 — —
4, 4'-Methylenedianiline CH2(C6H4NH2)2 0.01 0.08 — —
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 — —
2-Nitropropane CH3CH(NO2)CH3 5 18 — —
Rubber process dust            — 6 — —
Rubber fume(002)             — 0.6 — —
Silica, respirable crystalline SiO2 — 0.4 — —
Styrene C6H5CH=CH2 100 420 250 1050
1, 1, 1-Trichloroethane CH3CC13 350 1900 450 2450
Trichloroethylene CC12=CHC1 100 535 150 802
Vinyl chloridea(003)  CH2=CHC1 7 — — —
Vinylidene chloride CH2=CC12 10 40 — —
Wood dust (hard wood)            — 5 — —
 
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