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| OEL-CL |
OEL-RL: |
A-B | C-C | D-D | E-E | F-L | M-M | N-O | P-P | Q-S | T-T | U-Z |
|
DOL OEL-RL |
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M |
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|
Substance |
TWA OEL-RL |
Short Term OEL-RL |
Notes | ||
| ppm | mg/m3 | ppm | mg/m3 | ||
| MbOCA | - | 0.005 | - | - | Sk |
| MDA | 0.1 | 0.8 | 0.5 | 4 | - |
| MDI | - | 0.02 | - | 0.07 | Sen |
| Magnesite | |||||
| total inhalable dust | - | 10 | - | - | - |
| respirable dust | - | 5 | - | - | - |
| Magnesium oxide (as Mg) | |||||
| fume and respirable dust | - | 5 | - | 10 | - |
| respirable dust | - | 10 | - | - | - |
| Malathion (ISO) | - | 10 | - | - | Sk |
| Maleic anhydride | 0.25 | 1 | - | - | - |
| Manganese, fume (as Mn) | - | 1 | - | 3 | - |
| Manganese and compounds (as Mn) | - | 5 | - | - | - |
| Manganese cyclopentadienyl tricarbonyl | - | 0.1 | - | 0.3 | Sk |
| Manganese tetroxide | - | 1 | - | - | - |
| *Man made mineral fibre - See Annexure 3 | |||||
|
*The OEL-RL for man-made mineral fibre is set at 2 fibres ml-1, 8 hour TWA, when measured by the AIA RTM1 method. |
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| Marble | |||||
| total inhalable dust | - | 10 | - | - | - |
| respirable dust | - | 5 | - | - | - |
| Mequinol (INN) | - | 5 | - | - | - |
| Mercaptoacetic acid | 1 | 5 | - | - | - |
| Mercury alkyls (as Hg) | - | 0.01 | - | 0.03 | Sk |
| Mercury & compounds, except mercury alkyls, (as Hg) | - | 0.05 | - | 0.15 | - |
| Mesityl oxide | 15 | 60 | 25 | 100 | - |
| Methacrylic acid | 20 | 70 | 40 | 140 | - |
| Methacrylonitrile | 1 | 3 | - | - | Sk |
| Methanethiol | 0.5 | 1 | - | - | - |
| Methanol | 200 | 260 | 250 | 310 | Sk |
| Methomyl (ISO) | - | 2.5 | - | - | Sk |
| Methoxychlor (ISO) | - | 10 | - | - | - |
| 1-Methoxypropan-2-ol | 100 | 360 | 300 | 1080 | Sk |
| Methyl acetate | 200 | 610 | 250 | 760 | - |
| Methyl acrylate | 10 | 35 | - | - | - |
| Methylal | 1000 | 3100 | 1250 | 3880 | - |
| Methyl alcohol | 200 | 260 | 250 | 310 | Sk |
| Methylamine | 10 | 12 | - | - | - |
| Methyl-n-amyl-ketone | 50 | 240 | - | - | - |
| N-Methylaniline | 0.5 | 2 | - | - | Sk |
| Methyl bromide | 5 | 20 | 15 | 60 | Sk |
| 3-Methylbutan-1-ol | 100 | 360 | 125 | 450 | - |
| 1-Methylbutyl acetate | - | - | 150 | 800 | - |
| Methyl-n-butyl ketone | 5 | 20 | - | - | Sk |
| Methyl chloride | 50 | 105 | 100 | 210 | - |
| Methyl chloroform | 350 | 1900 | 450 | 2450 | - |
| Methyl 2-cyanoacrylate | 2 | 8 | 4 | 16 | - |
| Methylcyclohexane | 400 | 1600 | 500 | 2000 | - |
| Methylcyclohexanol | 50 | 235 | 75 | 350 | - |
| 2-Methylcyclohexanone | 50 | 230 | 75 | 345 | Sk |
| Methylcyclopentadienyl manganese, tricarbonyl (as Mn) | - | 0.1 | - | 0.6 | Sk |
| 2-Methyl-4,6-dinitrophenol | - | 0.2 | - | 0.6 | Sk |
| 4,4'-Methylenebis-(2-chloroaniline) (MbOCA) | - | 0.005 | - | - | Sk |
| Methylene chloride | 100 | 350 | 250 | 780 | - |
| 4,4'-Methylene-diphenyl diisocyanate (MDI) | - | 0.02 | - | 0.07 | Sen |
| 4,4'-Methylenedianiline (MDA) | 0.1 | 0.8 | 0.5 | 4 | - |
| Methyl ethyl ketone (MEK) | 200 | 590 | 300 | 885 | - |
| Methyl ethyl ketone peroxides (MEKP) | - | - | 0.2 | 1.5 | - |
| Methyl formate | 100 | 250 | 150 | 375 | - |
| 5-Methylheptan-3-one | 25 | 130 | - | - | - |
| 5-Methylhexan-2-one | 50 | 240 | 75 | 360 | Sk |
| Methyl iodide | 5 | 28 | 10 | 56 | Sk |
| Methyl isoamyl ketone | 50 | 240 | 75 | 360 | - |
| Methyl isobutyl carbinol | 25 | 100 | 40 | 160 | Sk |
| Methyl isobutyl ketone (MIBK) | 50 | 205 | 75 | 300 | Sk |
| Methyl isopropyl ketone | 200 | 705 | - | - | - |
| Methyl isocyanate | - | 0.02 | - | 0.07 | Sen |
| Methyl mercaptan | 0.5 | 1 | - | - | - |
| Methyl methacrylate | 100 | 410 | 125 | 510 | - |
| Methyl parathion | - | 0.2 | - | 0.6 | Sk |
| 2-Methylpentane-2,4-diol | 25 | 125 | 25 | 125 | - |
| 4-Methylpentan-2-ol | 25 | 100 | 40 | 160 | Sk |
| 4-Methylpentan-2-one | 50 | 205 | 75 | 300 | Sk |
| 4-Methylpent-3-and-2-one | 15 | 60 | 25 | 100 | - |
| 4-Methyl-m-phenylene diisocyanate | - | 0.02 | - | 0.07 | Sen |
| 2-Methylpropan-1-ol | 50 | 150 | 75 | 225 | - |
| 2-Methylpropan-2-ol | 100 | 300 | 150 | 450 | - |
| Methyl propyl ketone | 200 | 700 | 250 | 875 | - |
| 1-Methyl-2-pyrrolidone | 100 | 400 | - | - | - |
| Methyl silicate | 1 | 6 | 5 | 30 | - |
| alpha-Methylstyrene | - | - | 100 | 480 | - |
| Methylstyrenes, all isomers except alpha-methylstyrene | 100 | 480 | 150 | 720 | - |
| N-Methyl-N, 2,4,6-tetranitroaniline | - | 1.5 | - | 3 | Sk |
| Mevinphos (ISO) | 0.01 | 0.1 | 0.03 | 0.3 | Sk |
| Mica | |||||
| total inhalable dust | - | 10 | - | - | - |
| respirable dust | - | 1 | - | - | - |
| Molybdenum compounds (as Mo) | |||||
| soluble compounds | - | 5 | - | 10 | - |
| insoluble compounds | - | 10 | - | 20 | - |
| Monochloroacetic acid | 0.3 | 1 | - | - | Sk |
| Morpholine | 20 | 70 | 30 | 105 | Sk |