Factories Act, 1948 Schedule II - Bare Act |
| State | Central Government |
| Year | 1948 |
| Section Title | The Second Schedule |
1 [THESECOND SCHEDULE]
(Seesection 41 F)
PERMISSIBLELEVELS OF CERTAIN CHEMICAL SUBSTANCES INWORK ENVIRONMENT
| Permissible Limits of exposure | |||||
| Serial No. | Substance | Time-weighted average concentration (TWA) (8 hrs) | Short-term exposure limit (STEL) (15 min)* | ||
| ppm. | mg/m3 ** | ppm | mg/m3 ** | ||
| 1 | 2 | 3 | 4 | 5 | 6 |
| 1. Acetaldehyde | 100 | 180 | 150 | 270 | |
| 2. Acetic acid | 10 | 25 | 15 | 37 | |
| 3. Acetone | 750 | 1780 | 1000 | 2375 | |
| 4. Acrolein | 0.1 | 0.25 | 0.3 | 0.8 | |
| 5. Acrylonitrile-Skin (S.C.) | 2 | 4.5 | -- | -- | |
| 6. Aldrin-skin | -- | 0.25 | -- | -- | |
| 7. Allychloride | 1 | 3 | 2 | 6 | |
| 8. Ammonia | 25 | 18 | 35 | 27 | |
| 9. Aniline-Skin | 2 | 10 | -- | -- | |
| 10. Anisidine (o-,p-isomers) Skin | 0.1 | 0.5 | -- | -- | |
| 11. Arsenic A soluble compounds (as As) | -- | 0.2 | -- | -- | |
| 2 [12. Benzene (S.C.) | 05 | 1.5 | 25 | 7.5 | |
| 13. Beryllium & Compound (as Be) (S.C.) | -- | 0.002 | -- | -- | |
| 14. Boron trifluoride-C | 1 | 3 | -- | -- | |
| 15. Bromine | 0.1 | 0.7 | 0.3 | 2 | |
| 16. Butane | 800 | 1900 | -- | -- | |
| 17. 2-Butanone (Methyl-ethyl Ketone-MEK) | 200 | 590 | 300 | 835 | |
| 18. n-Butyl acetate | 150 | 710 | 200 | 950 | |
| 19. n-Butyle alcohol-Skin-C | 50 | 150 | -- | -- | |
| 20. Sec/ tert. Butylacetate | 200 | 950 | -- | -- | |
| 21. Butyl mercaptan | 0.5 | 1.5 | -- | -- | |
| 22. Cadmium Dusts and salts (as Cd) | -- | 0.05 | -- | -- | |
| 23. Calcium oxide | -- | 2 | -- | -- | |
| 24. Carbaryl (Sevin) | -- | 5 | -- | -- | |
| 25. Carbofuran (Furadan) | -- | 0.1 | -- | -- | |
| 26. Carbon disulphade-Skin | 10 | 30 | -- | -- | |
| 27. Carbon monoxide | 50 | 55 | 400 | 440 | |
| 28. Carbon tetrachloride-Skin (S.C.) | 5 | 30 | -- | -- | |
| 29. Chlordane-Skin | -- | 0.5 | -- | -- | |
| 30. Chlorine | 1 | 3 | 3 | 9 | |
| 31. Chlorobenzene (Monochlorobenzene) | 75 | 350 | -- | -- | |
| 32. Chloroform (S.C.) | 10 | 50 | -- | -- | |
| 33. bis (Chloromethyl) ether (H.C.) | 0.001 | 0.005 | -- | -- | |
| 34. Chromic acid and chromates (as Cr) (Water Soluble) | -- | 0.05 | -- | -- | |
| 35. Chromous salts (as Cr) | -- | 0.05 | -- | -- | |
| 36. Copper Fume | -- | 0.2 | -- | -- | |
| 37. Cotton dust, raw3 | -- | 0.23 | -- | -- | |
| 38. Crosol, all isomers-Skin | 5 | 22 | -- | -- | |
| 39. Cyanides (as CN)--Skin | -- | 5 | -- | -- | |
| 40. Cyanogen | 10 | 20 | -- | -- | |
| 41. DDT (Dichlorodiphenyl trichloroethane) | -- | 1 | -- | -- | |
| 42. demeron-Skin | 0.01 | 0.1 | -- | -- | |
| 43. Diazinon-Skin | -- | 0.1 | -- | -- | |
| 44. Dibutyl phthalale | -- | 5 | -- | -- | |
| 45. Dichlorvos (DDVP)-Skin | 0.1 | 1 | -- | -- | |
| 46. Dieldrin-Skin | -- | 0.25 | -- | -- | |
| 47. Dinitrobenzene (all isomers)-Skin | 0.15 | 1 | -- | -- | |
| 48. Dinitrotolune-Skin | -- | 1.5 | -- | -- | |
| 49. Diphenyl-(Biphenyl) | 0.2 | 1.5 | -- | -- | |
| 50. Endosulfan (Thiodan)-Skin | -- | 0.1 | -- | -- | |
| 51. Endrin-Skin | -- | 0.1 | -- | -- | |
| 52. Ethyl acetate | 400 | 1400 | -- | -- | |
| 53. Ethyl alcohol | -- | 1000 | 1900 | -- | |
| 54. Ethylamine | 10 | 18 | -- | -- | |
| 55. Fluorides (as F) | -- | 2.5 | -- | -- | |
| 56. Fluorine | 1 | 2 | 2 | 4 | |
| 57. Formaldehyde (S.C.) | 1.0 | 1.5 | 2 | 3 | |
| 58. Formic acid | 5 | 9 | -- | -- | |
| 59. Gasoline | 300 | 900 | 500 | 1500 | |
| 60. Hydrazine-- Skin (S.C.) | 0.1 | 0.1 | -- | -- | |
| 61. Hydrogen chloride -- C | 5 | 7 | -- | -- | |
| 62. Hydrogen cyanide -- Skin --C | 10 | 10 | -- | -- | |
| 63. Hydrogen fluoride (as F) --C | 3 | 2.5 | -- | -- | |
| 64. Hydrogen peroxide | 1 | 1.5 | -- | -- | |
| 65. Hydrogen sulphide | 10 | 14 | 15 | 21 | |
| 66. Iodine-C | 0.1 | 1 | -- | -- | |
| 67. Iron-Oxide Fume (Fe2O3) (as Fe) | -- | 5 | -- | -- | |
| 68. Isoamyl acetate | 100 | 525 | -- | -- | |
| 69. Isoamyl alcohol | 100 | 360 | 125 | 4500 | |
| 70. Isobutyl alcohal | 50 | 150 | -- | -- | |
| 71. Lead, inorg, dusts and fumes (as Pb) | -- | 0.15 | -- | -- | |
| 72. Lindane-Skin | -- | 0.5 | -- | -- | |
| 73. Malathion-Skin | -- | 10 | -- | -- | |
| 74. Manganese dust and compounds (as Mn)-C | -- | 5 | -- | -- | |
| 75. Manganese fume (as Mn) | -- | 1 | -- | 3 | |
| 76. Mercury (as Hg) -- Skin -- | |||||
| (i) Alkyl compounds | -- | 0.01 | -- | 0.03 | |
| (ii) All forms except alkyl vapour | -- | 0.05 | -- | -- | |
| (iii) Aryl and inorganic compounds | -- | 0.1 | -- | -- | |
| 77. Methyl alcohol (Methanol)--Skin | 200 | 260 | 250 | 310 | |
| 78. Methyl Cellosolve (2-Methoxy-ethanol) Skin | 5 | 16 | -- | -- | |
| 79. Methyl isobutyl ketone | 50 | 205 | 75 | 300 | |
| 80. Methyl isocyanate-Skin | 0.02 | 0.05 | -- | -- | |
| 81. Napthalene | 10 | 50 | 15 | 75 | |
| 82. Nickel carbonyl (as Ni) | 0.05 | 0.35 | -- | -- | |
| 83. Nitric acid | 2 | 5 | 4 | 10 | |
| 84. Nitric oxide | 25 | 30 | -- | -- | |
| 85. Nitrobenzene-Skin | 1 | 5 | -- | -- | |
| 86. Nitrogen dioxide | 3 | 6 | 5 | 10 | |
| 87. Oil mist-mineral | -- | 5 | -- | 10 | |
| 88. Ozone | 0.1 | 0.2 | 0.3 | 0.6 | |
| 89. Parathion--Skin | -- | 0.1 | -- | -- | |
| 90. Phenol-Skin | 5 | 19 | -- | -- | |
| 91. Phorate (Thimet)-- Skin | -- | 0.05 | -- | 0.2 | |
| 92. Phosgene (Carbonyl chloride) | 0.1 | 0.4 | -- | -- | |
| 93. Phosphine | 0.3 | 0.4 | 1 | 1 | |
| 94. Phosphoric acid | -- | 1 | -- | 3 | |
| 95. Phosphorus (yellow) | -- | 0.1 | -- | -- | |
| 96. Phosphorus pentachloride | 0.1 | 1 | -- | -- | |
| 97. Phosphorus trichloride | 0.2 | 1.5 | 0.5 | 3 | |
| 98. Picric acid-Skin | -- | 0.1 | -- | 0.3 | |
| 99. Pyridine | 5 | 15 | -- | -- | |
| 100. Silane (Silicon tetrahydride) | 5 | 7 | -- | -- | |
| 101. Sodium hydroxide-C | -- | 2 | -- | -- | |
| 102. Styrene, monomer (Phenylethylene) | 50 | 215 | 100 | 425 | |
| 103. Sulphur dioxide | 2 | 5 | 5 | 10 | |
| 104. Sulphur hexafluoride | 1000 | 6000 | -- | -- | |
| 105. Sulphuric acid | -- | 1 | -- | -- | |
| 106. Tetraethyl lead (as Pb)-- Skin | -- | 0.1 | -- | -- | |
| 107. Toluene (Toluol) | 100 | 375 | 150 | 560 | |
| 108. O-Toluidinz-Skin (S.C.) | 2 | 9 | -- | -- | |
| 109. Tributyl phosphate | 0.2 | 2.5 | -- | -- | |
| 110. Trichloroethylene | 50 | 270 | 200 | 1080 | |
| 111. Uranium, natural (as U) | -- | 0.2 | -- | 0.6 | |
| 112. Vinyl chloride (H.C.) | 5 | 10 | -- | -- | |
| 113. Welding fumes | -- | 5 | -- | -- | |
| 114. Xylene (o-, m-, p-isomers) | 100 | 435 | 150 | 655 | |
| 115. Zinc oxide-- | |||||
| (i) Fume | -- | 5.0 | -- | 10 | |
| (ii) Dust (Total dust) | -- | 10.0 | -- | -- | |
| 116. Zirconium compounds (as Zr) | -- | 5 | -- | 10 | |
| ppm | Parts of vapour or gas per million parts of contaminated air by volume at 25C and 760 (mm of mercury). | ||||
| mg/m3 | milligrams of substance per cubic metre of air. | ||||
| * | Not more than 4 times a day with at least 60 min. interval between successive exposures. | ||||
| ** | mg/m3 = Molecular weight X ppm 24.45 | ||||
| C | denotes ceiling limit. | ||||
| Skin | denotes potential contribution to the overall exposure by the cutaneous route including mucous membranes and eye. | ||||
| S.C. | denotes Suspected human carcinogens. | ||||
| H.C. | denotes confirmed human carcinogens. | ||||
| Substance | Permissible time-weighted average concentration (TWA) (8 hours) | ||||
| Silica, SiO2 | |||||
| (a) Crystalline | |||||
| (i) Quartz | |||||
| (1) In term of dusts count | 10600 mppcm %Quartz+10 | ||||
| (2) In terms of respirable dust | 10 mg/m3 %respirable Quartz+2 | ||||
| (3) In terms of total dust | 30 mg/m3 % Quartz+3 mg/m2 | ||||
| (ii) Cristobalite | Half the limits given against quartz | ||||
| (iii) Tridymite | Half the limits given against quartz | ||||
| (iv) Silica, fused | Same limits as for quartz | ||||
| (v) Tripoli | Same limit as in formula in item (2) given against quartz | ||||
| (b) Amorphous Silicate | 10 mg/m3 , Total dust | ||||
| 2 [Asbestos (H.C.) |
| ||||
| (a) Amosite | 0.5 fibre/cc*** | ||||
| (b) Chrystolite | 1.0 fibre/cc*** | ||||
| (c) Crocidolite | 0.2 fibre/cc*** | ||||
| *** | (i) For fibres greater than 5 um in length and less than 5 um in breadth with length to breadth ratio equal to or greater than 3 : 1. (ii) As determined by the membrane filter method at 400-450X magnification (4mm objective) phase contrast illumination.] | ||||
| Portland cement | 10 mg/m3 , Total dust containing less than 1% Quartz | ||||
| Coal Dust | 2 mg/m3 , respirable dust fraction containing less than 5% quartz | ||||
| mppcm | Million particles per cubic metre of air based on impinger samples counted by light-field techniques. | ||||
| *As determined by the membrane-liter method at 400--450 x megnification (4 mm objective) phase contrast illumination. | |||||
| Respirable Dust: | |||||
| Fraction passing a size-selector with the following characteristics: | |||||
| Aerodynamic Diameter (u.m.) | % passing sector | ||||
| (Unit density sphere) | |||||
| < 2 | 90 | ||||
| 2.5 | 75 | ||||
| 3.5 | 50 | ||||
| 5.0 | 25 | ||||
| 10 | 0] | ||||
____________________
1.Substituted by S.O. 170 (E), dated 2nd March, 1989.
2.Substituted by S.O. 342 (E), dated 19th April, 2001 (w.e.f. 19-4-2001).
3.Lint-free dust as measured by the vertical clutricator cotton-dust sampler.