Schedule 1 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 |
° 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 | — | — |
| 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) |  | 0.5 | 2 | 1.5 | 6 |
| 2-Ethoxyethanol | C2H5OCH2CH2OH | 10 | 37 | — | — |
| 2-Ethoxyethyl acetate | C2H5OCH2CH2OOCCH3 | 10 | 54 | — | — |
| Ethylene oxide |  | 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 fibref1 | — | 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 fumef2 | — | 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 chlorideaf3 | CH2=CHC1 | 7 | — | — | — |
| Vinylidene chloride | CH2=CC12 | 10 | 40 | — | — |
| Wood dust (hard wood) | — | 5 | — | — | |
Annotations
Footnotes
- f1
°
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.
- f2
*
Limit relates to cyclohexane soluble material.
- f3
#
In addition to the maximum exposure limit specified above vinyl chloride is also subject to an overriding annual exposure limit of 3 ppm.