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Regulation 2(5)
Regulations 2(1), 7(6) 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 TWA reference period) | Short-term maximum exposure limit(15-minute reference period) | ||||
Substance | Formula | ppm | mg m−3 | ppm | mg m−3 |
* 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. | |||||
** Limit relates to cyclohexane soluble material. | |||||
*** In addition to the maximum exposure limit specified above vinyl chloride is also subject to an overriding annual exposure limit of 3 ppm.” | |||||
Acrylamide | CH2=CHCONH2 | — | 0.3 | — | — |
Acrylonitrile | CH2=CHCN | 2 | 4.4 | — | — |
Antimony & antimony compounds except stibine (as Sb) | Sb | — | 0.5 | — | — |
Arsenic & compounds except arsine (as As) | As | — | 0.1 | — | — |
Azodicarbonamide | C2H4N4O2 | — | 1.0 | — | 3.0 |
Benzene | C6H6 | 5 | 16 | — | — |
Beryllium and beryllium compounds (as Be) | Be | — | 0.002 | — | — |
Bis(chloromethyl) ether | ClCH2OCH2C1 | 0.001 | 0.005 | — | — |
Buta-1, 3-diene | CH2=CHCH=CH2 | 10 | 22 | — | — |
Cadmium & cadmium compounds, exceptcadmium oxide fume,cadmium sulphide andcadmium sulphidepigments (as Cd) | Cd | — | 0.025 | — | — |
Cadmium oxide fume(as Cd) | CdO | — | 0.025 | — | 0.05 |
Cadmium sulphide andcadmium sulphidepigments (respirabledust as Cd) | CdS | — | 0.03 | — | — |
Carbon disulphide | CS2 | 10 | 32 | — | — |
1-Chloro-2,3-epoxypropane (Epichlorohydrin) | OCH2-CH-CH2Cl | 0.5 | 1.9 | 1.5 | 5.8 |
Chromium (VI) compounds (as Cr) | Cr | — | 0.05 | — | — |
Cobalt and cobalt compounds (as Co) | Co | – | 0.1 | — | — |
Cotton dust | — | 2.5 | — | — | |
1,2-Dibromoethane (Ethylene dibromide) | BrCH2CH2Br | 0.5 | 3.9 | — | — |
1,2-Dichloroethane (Ethylene dichloride) | ClCH2CH2Cl | 5 | 21 | — | — |
Dichloromethane | CH2Cl2 | 100 | 350 | 300 | 1060 |
2,2'-Dichloro-4,4' -methylene dianiline (MbOCA) | CH2(C6H3ClNH2)2 | — | 0.005 | — | — |
Diethyl sulphate | C4H10O4S | 0.05 | 0.32 | — | — |
Dimethyl sulphate | C2H6O4S | 0.05 | 0.26 | — | — |
2-Ethoxyethanol | C2H5OCH2CH2OH | 10 | 37 | — | — |
2-Ethoxyethyl acetate | C2H5OCH2CH2OOCCH3 | 10 | 55 | — | — |
Ethylene oxide | CH2CH2O | 5 | 9.2 | — | — |
Ferrous foundry particulate total inhalable dust | — | 10 | — | — | |
respirable dust | — | 4 | — | — | |
Formaldehyde | HCHO | 2 | 2.5 | 2 | 2.5 |
Grain dust | — | 10 | — | — | |
Halogeno-platinum compounds (complex co-ordination compounds in which the platinum atom is directly co-ordinated to halide groups) (as Pt) | — | 0.002 | — | — | |
Hardwood dust | — | 5 | — | — | |
Hydrazine | N2H4 | 0.02 | 0.03 | 0.1 | 0.13 |
Hydrogen cyanide | HCN | — | — | 10 | 11 |
Iodomethane | CH3I | 2 | 12 | — | — |
Isocyanates, all (as -NCO) | — | 0.02 | — | 0.07 | |
Maleic anhydride | C4H2O3 | — | 1 | — | 3 |
Man-made mineral fibre* | — | 5 | — | — | |
2-Methoxyethanol | CH3OCH2CH2OH | 5 | 16 | — | — |
2-Methoxyethyl acetate | CH3COOCH2CH2OCH3 | 5 | 25 | — | — |
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 | 19 | — | — |
Phthalic anhydride | C8H4O3 | — | 4 | — | 12 |
Polychlorinated biphenyls (PCB) | C12CH(10−×)Cl× | — | 0.1 | — | — |
Propylene oxide | C3H6O | 5 | 12 | — | — |
Rubber fume** | — | 0.6 | — | — | |
Rubber process dust | — | 6 | — | — | |
Silica, respirable crystalline | SiO2 | — | 0.3 | — | — |
Softwood dust | — | 5 | — | — | |
Styrene | C6H5CH=CH2 | 100 | 430 | 250 | 1080 |
o-Toluidine | CH3C6H4NH2 | 0.2 | 0.89 | — | — |
Trichloroethylene | CCl2=CHCl | 100 | 550 | 150 | 820 |
Triglycidyl isocyanurate (TGIC) | C12H15N3O6 | — | 0.1 | — | — |
Trimellitic anhydride | C9H4O5 | — | 0.04 | — | 0.12 |
Vinyl chloride*** | CH2=CHCI | 7 | — | — | — |
Vinylidene chloride | CH2=CCl2 | 10 | 40 | — | — |
Wool process dust | — | 10 | — | — |
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