Substance name

TLV- TWA
ACGIH,1998mg/m3

U.S.EPA
Unit Risk
(per1m g/m3)

 AR (w)/1 E-05

1,2-dichloroethane

40

1996

2.6 E-05

1.3 E-01

13000

1,3-butadiene

4.4

1994

2.8 E-04

1.5 E-01

15400

Acetaldehyde

45

1993

2.2 E-06

1.2 E-02

1237.5

Acrylonitrile

4.3

1984

6.8 E-05

3.7 E-02

3655

Benzene

1.6

8.3 E-06

1.7 E-03

166

Beryllium

0.01

2.4 E-03

6.0 E-04

60

Carbon tetrachloride

31

1996

1.5 E-05

5.8 E-02

5812.5

Chloroform

49

1996

2.3 E-05

1.4 E-01

14087.5

Dichloromethane

174

1996

4.7 E-07

1.0 E-02

1022.2

Dichloromethyl-ether

0.001

1981

6.2 E-02

7.7 E-03

775

Epichlorohydrin

1.9

1.2 E-06

0.7 E-04

7

Formaldehyde

0.37

1992

1.3 E-05

6.0 E-04

60.1

Heptachlor

0.05

1994

1.3 E-03

8.1 E-03

812.5

Heptachlor epoxide

0.05

1994

2.6 E-03

1.6 E-02

1625

Hexachlorobenzene

0.025

4.6 E-04

1.2 E-04

12

P,pdichlorodiphenyl- trichlorethane (DDT)

1

1996

9.7 E-05

1.2 E-02

1212.5

Propilene oxide

48

1996

3.7 E-06

2.2 E-02

2220

Toxaphene

0.5

1996

3.2 E-04

2.0 E-02

2000