AdvocateKhoj
Login : Advocate | Client
Home Post Your Case My Account Law College Law Library
    

Factories Act, 1948


Schedule II : Permissible Levels of Certain Chemical Substances in Work Environment

[Section 41F]

S. No

Substance

Permissible limits of exposure

Time-weighted average Concentration (8hrs)M

Short-term exposure limit (15min)*

 

 

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.

Acrylo nitrile-Skin

2

4.5

-

-

6.

Aldrin-skin

-

0.25

-

-

7.

Allylchloride

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 and Soluble com- pounds (as)

-

0.2

-

-

12.

Benzene(S.C.)

10

30

-

-

13.

Beryllium and 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-Butane (methylethyl Ketone-MEK)

200

590

300

835

18.

n-Butyl acetate

150

710

200

950

19.

n-Butyl alcohol-Skin-C

50

150

-

-

20.

Sec./tert.Butyl acetate

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 disulphide-Skin

10

30

-

-

27.

Carbon monoxide

50

55

400

440

28.

Carbon tetrachloride Skin (S.C)

5

30

-

-

29.

Chlordene-Skin

-

0.5

-

2

30.

Chlorine

1

3

3

9

31.

Chlorobenzene (Monochloro benzene)

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.)

-

0.05

-

-

35.

Chromous salts (as Cr)

-

0.5

-

-

36.

Copper Fume

-

0.2

-

 

37.

Cotton dust, raw*

-

0.2*

-

-

38

Creosol, all isomers - Skin

5

22

-

-

39.

Cyanides (as CN)-Skin

-

5

-

-

40.

Cyanogen

-

10

20

-

41.

DDT (Dichlorodi phenyl trichloroethane)

-

1

-

-

42.

Demeton-Skin

0.01

0.1

-

-

43.

Diazinon-Skin

-

0.1

-

-

44.

Dibutyl phthalate

-

5

-

-

45.

Dicholorvos (DDVP)-Skin

0.1

1

-

-

46.

Dieldrin-Skin

-

0.25

-

-

47.

Dinitrobenzene (all isomers)-Skin

0.15

1

-

-

48.

Dinitrotoluene-Skin

-

1.5

-

-

49.

Diphenyl-(Biphenyl)

0.2

1.5

-

-

50.

Endosulfan (Thiodan)-Skin

-

0.1

-

-

51.

Endrin-Skin

-

0.1

-

-

52.

Ethylacetate

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 flouride (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.

Isomyl alcohol

100

360

125

4500

70.

Isobutyl alcohol

50

150

-

-

71.

Lead, inorg Dusts, dusts and fumes (as Pb).

-

0.15

-

-

72.

Lindane-Skin

-

0.5

-

-

73.

Malathion Skin

-

10

-

-

74.

Manganese (as Mn ) dust and compounds-C

-

5

-

-

75.

Manganese fume (as Mn)

-

1

-

3

76.

Mercury (as Hg)-Skin-

(i) Alkyl compounds

(ii) All forms except alkyl vapor

-

-

0.01

0.05

-

-

0.03

-

77.

Aryl and inorganic compounds

-

0.1

-

-

78.

Methyl alcohol (Methanol)-Skin

200

260

250

310

79.

Methyl Cellosolve (2-Methoxy ethanol)-Skin

5

16

-

-

80.

Methyl isobutyl ketone

50

205

75

300

81.

Methyl isocyanate ketone

0.02

0.05

-

-

82.

Naphthalene

10

50

15

75

83.

Nickel carbonyl (as Ni)

0.05

0.35

-

-

84.

Nitric acid

2

5

4

10

85.

Nitric oxide

25

30

-

-

86.

Nitrobenzene-Skin

1

5

-

-

87.

Nitrogen dioxide

3

6

5

10

88.

Oil mist-mineral

-

5

-

10

89.

Ozone

0.1

0.2

0.3

0.6

90.

Parathion-Skin

-

0.1

-

-

91.

Phenol-Skin

5

19

-

-

92.

Phorate (Thimet)-Skin

-

0.05

-

0.2

93.

Phosgene (Carbonyl chloride)

0.1

0.4

-

-

94.

Phosphine

0.3

0.4

1

1

95.

Phosphoric acid

-

1

-

3

96.

Phosphorus (yellow)

-

0.1

-

-

97.

Phosphorus pentachloride

0.1

1

-

-

98.

Phosphorus trichloride

0.2

1.5

0.5

3

99.

Picric acid - Skin

-

0.1

-

0.3

100.

Pyridine

5

15

-

-

101.

Silane (Silicon tetrahydride)

5

7

-

-

102.

Sodium Hydroxide-C

-

2

-

-

103.

Styrene, monomer (Phenyl-ethylene)

50

215

100

425

104.

Sulphur dioxide

2

5

5

10

105.

Sulphur hexaflouride

1000

6000

-

-

106.

Sulphuric acid

-

1

-

-

107.

Tetraethyl lead (as Pb)-Skin

-

0.1

-

-

108.

Toluene (Toluol)

100

375

150

560

109.

o-Toluidine-Skin(S.C)

2

9

-

-

110.

Tributyl phosphate

0.2

2.5

-

-

111.

Trichloro-ethylene

50

270

200

1080

112.

Uranium, natural (as U)

-

0.2

-

0.6

113.

Vinyl chloride (H.C.)

5

10

-

-

114.

Welding fumes

-

5

-

-

115.

Xylene (o,m,p-isomers)

100

435

150

655

116.

Zinc oxide

(i) Fume

(ii) Dust

(Total dust)

-

-

5

10

-

-

10

-

117.

Zirconium compounds (as Zr)

-

5

-

10

 

ppm 3 Parts of vapor or gas per million parts of contaminated air by volume at 25oC and 760 torr. (mm of mercury)

Mg/ m2 milligrams of substance per cubic meter of air.

* Not more than 4 times a day with at least 60 min. interval between successive exposures.

** mg/ m3 = Molecular weight * 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.

Substances

SPermissible time-weighted average concentration (TWA) (8 hours)

Silica, SiO2

 

(a) Crystalline

 

(i) Quartz

 

(1) In terms of dusts count

10600 mppcm % Quartz +10

(2) In terms of respirable dust

10 mg/ m2

respirable Quartz +2

(3) In terms of total dust

30 mg/ m2

% Quartz +3

(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

10mg/ m3, total dust

Asbestos (H.C.)

*2 fibers/ ml, greater than 5 um in length and less than 3 um in breadth.

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 meter of air, based on impinger samples counted by light-field techniques. *As determined by the membrane filter method at 400 -

450 x magnification (4 mm objective ) phase contrast illumination.

Respirable Dust:

Fraction passing a size-selector with the following characteristics:

 

Aerodynamic Diameter (um)

(Unit density sphere)

% passing selector

< 2

90

2.5

75

3.5

50

5.0

25

10

0



Factories Act, 1948 Back




Client Area | Advocate Area | Blogs | About Us | User Agreement | Privacy Policy | Advertise | Media Coverage | Contact Us | Site Map
powered by nubia  |  driven by neosys