Permissible levels of certain chemical substances in work environment

Permissible levels of certain chemical substances in work environment
S.No.
Name of the chemical
Permissible limits of exposure
Time-Weighted Average Concentration (8 Hrs)
Short Term Exposure Limit (15 min)
IDLH
 ppm
 mg/m3
ppm
mg/m3
ppm
1
Acetaldehyde
100
180
150
270
2000
2
Acetic Acid
10
25
15
37
50
3
Acetone
750
1780
1000
2375
*
4
Ammonia
25
18
35
27
300
5
Boron Tri Floride
1
3
*
*
*
6
Bromine
0.1
0.7
0.3
2
*
7
Chlorine
1
3
3
9
10
8
Chloroform
10
50
*
*
10
9
Ethyl Acetate
400
1400
*
*
*
10
Ethyl Alcohol
1000
1900
*
*
*
11
Formaldehyde
1.1
1.5
2
3
20
12
Hydrogen chloride
5
7
*
*
50
13
Hydrogen Peroxide
1
1.5
*
*
*
14
Iso Butyl Alcohol
50
150
75
*
*
15
Methyl Alcohol
200
260
250
310
*
16
Methyl Iso Butyl Ketone
50
205
75
300
*
17
Nitric Acid
2
5
4
10
25
18
Ozone
0.1
0.2
0.3
0.6
*
19
Phenol
5
19
*
*
*
20
Phosgene
0.1
0.4
*
*
2
21
Phosporous Pentachloride
0.1
1
*
*
*
22
Phosporous Trichloride
0.2
1.5
0.5
3
25
23
Pyridine
5
15
*
*
*
24
Sodium Hydroxide
*
2
*
*
*
25
Sulfuric Acid
*
1
*
*
*
26
Toluene
100
375
150
560
500
27
Xylene
100
435
150
655
900