USGS

Preliminary Conceptual Models of the Occurrence, Fate, and Transport of Chlorinated Solvents in Karst Regions of Tennessee

Table 2. Properties of selected chlorinated organic compounds

[values are at 20° Celsius; mg/L, milligrams per liter; g/cm3 , grams per cubic centimeter; cP, centipoise; mm Hg, millimeters of mercury; NA, not applicable; data from Cohen and Mercer, 1993, and Lucius and others, 1992]

Compound

Molecular
weight
(grams)

Solubility
in water
(mg/L)

Density
(g/cm3)

Absolute
viscosity
(cP)

Vapor
pressure
(mm Hg)

Relative
vapor
density1

Tetrachloroethylene
(PCE)

165.8

200

1.62

0.89

14

1.09

Trichloroethylene
(TCE)

131.4

1,100

1.46

0.57

58

1.27

cis-1,2-Dichloroethylene
(cis-DCE)

96.9

3,500

1.28

0.48

160

1.63

trans-1,2-Dichloroethylene
(trans-DCE)

96.9

6,300

1.26

0.40

260

1.83

1,1-Dichloroethylene
(1,1-DCE)

96.9

400

1.22

0.36

490

2.54

1,1,2,2-Tetrachloroethane

167.8

2,900

1.60

1.75

5.0

1.03

1,1,1-Trichloroethane
(1,1,1-TCA)

133.4

1,300

1.34

1.20

100

1.48

1,1,2-Trichloroethane
(1,1,2-TCA)

133.4

4,400

1.44

0.12

19

1.09

1,1-Dichloroethane
(1,1-DCA)

99.0

5,500

1.17

0.44

180

1.58

1,2-Dichloroethane
(1,2-DCA)

99.0

8,700

1.25

0.80

64

1.21

Carbon tetrachloride
(CTET)

153.8

800

1.59

0.97

90

1.52

Trichlorofluoromethane
(TCFM)

137.4

1,100

1.49

0.42

690

4.91

Dichloromethane
(DCM)

84.9

20,000

1.33

0.44

340

1.90

Water

18.0

NA

1.00

1.00

17.5

1.0

1 Relative vapor density is calculated as the weighted mean formula weight of compound-saturated air relative to the mean formula weight of moist air (Schwille, 1988).


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