| Chemical |
Hexachloroethane |
| CAS-number : |
67-72-1 |
| |
| Synonyms : |
| etyleeniheksakloridi |
| heksakloorietaani |
| perchloroethane |
| |
| Sumformula of the chemical : |
| C2Cl6 |
| EINECS-number : |
| 2006664 |
| |
| Uses : |
Manufacturing smoke candles and grenades; by-product of
industrial chlorination processes; plasticizer for cellulose
esters.
|
| |
| State and appearance : |
solid rhombic crystals
|
| |
| Molecular weight : |
236.76 |
| |
| Vapor pressure, mmHg : |
| 0.4 |
20°C |
| |
| Water solubility, mg/l : |
| 50 |
22°C |
| 50 |
22.3°C, MITI 1992 |
| |
| Boiling point, °C : |
| 186.8 |
MITI 1992 |
| |
| Henry's law constant, Pa x m3/mol : |
| 2267 |
calc. Yaws et al. 1991 |
| |
| Volatilization : |
Measured half-life for evaporation from 1 ppm aqueous solution at
25 °C: 40.7 min.
(Verschueren 1983).
|
| |
| Photochemical degradation in air : |
Photooxidation half-life in air:
>7.3yr - >73yr,
scientific judgement based upon an estimated maximum rate
constant for reaction with hydroxyl radical (Howard 1991).
|
| |
| Half-life in air, days : |
| 2555 |
>7.3yr - >73yr, |
| 26645 |
scientific judgement based upon an estimated |
| |
maximum rate constant for reaction with |
| |
hydroxyl radical, |
| |
Howard 1991 |
| |
| Half-life in soil, days : |
| 28 |
4w - 6mo, |
| 180 |
scientific judgement based upon estimated |
| |
aqueous aerobic biodegradation half-life, |
| |
Howard 1991 |
| |
| Half-life in water, days : |
| 28 |
4w - 6mo, |
| 120 |
in surface water, scientific judgement based |
| |
upon estimated aqueous aerobic biodegradation |
| |
half-life, |
| 56 |
8w - 12mo, |
| 360 |
in ground water, scientific judgement based |
| |
upon estimated aqueous aerobic biodegradation |
| |
half-life, |
| |
Howard 1991 |
| |
| Aerobic degradation in water : |
Aerobic half-life:
4w - 6mo,
scientific judgement based upon aqueous screening studies
(Howard 1991).
|
| |
| Anaerobic degradation in water : |
Anaerobic half-life:
16w - 24mo,
scientific judgement based upon estimated aqueous aerobic
biodegradation half-life (Howard 1991).
|
| |
| Total degradation in water : |
Biodegradation:
0% by BOD
period: 14d
substance: 100 mg/l
sludge: 30 mg/l
(MITI 1992)
|
| |
| Bioconcentration factor, fishes : |
| 756 |
32d, Pimephales promelas, USEPA 1984 |
| 1.4 |
1.4 - 8.5, 6w, Cyprinus carpio, conc 0.005 mg/l, |
| 8.5 |
|
| 1 |
1.0 - 6.8, 6w, Cyprinus carpio, conc 0.0005 mg/l, |
| 6.8 |
MITI 1992 |
| |
-- |
| 139 |
Lepomis macrochirus, AQUIRE 1994 |
| |
| Other information of bioaccumulation : |
Confirmed to be non-accumulative or low accumulative (Anon.
1987).
|
| |
| LD50 values to mammals in oral exposure, mg/kg : |
| 6000 |
orl-rat, Lewis & Sweet 1984 |
| 4970 |
orl-gpg, - " - |
| |
| Carcinogenicity : |
NCI carcinogenesis bioassay completed: results positive, mus;
results negative, rat (Lewis & Sweet 1984).
|
| |
| EC50 values to microorganism, mg/l : |
| 8.3 |
Microtox, Tarkpea et al. 1986 |
| |
| EC50 values to algae, mg/l : |
| 7.75 |
96hr, algae, BUA 1989 |
| |
| LC50 values to crustaceans, mg/l : |
| 8.1 |
48hr, Daphnia magna, LeBlanc 1980 |
| |
-- |
| 2.9 |
48hr, unfed, Daphnia magna |
| 2.35 |
48hr, fed, Daphnia magna |
| |
USEPA 1984 |
| |
| EC50 values to crustaceans, mg/l : |
| 2.1 |
48hr, unfed, Daphnia magna |
| 1.81 |
48hr, fed, Daphnia magna |
| |
USEPA 1984 |
| |
| LC50 values to fishes, mg/l : |
| 1.23 |
96hr, Pimephales promelas |
| 0.97 |
96hr, Lepomis macrochirus |
| 0.97 |
96 hr, Salmo gairdneri |
| |
Phipps & Holcombe 1985 |
| |
-- |
| 1.5 |
96hr, Pimephales promelas |
| |
Veith et al. 1983 |
| |
-- |
| 0.98 |
96hr, Lepomis macrochirus |
| |
Buccafusco et al. 1981 |
| |
-- |
| 2.4 |
96hr, Cyprinodon variegatus |
| |
Heitmüller et al. 1981 |
| |
-- |
| 1.51 |
96hr, flow-through, Pimephales promelas |
| 0.84 |
96hr, Salmo gairdneri |
| |
USEPA 1984 |
| |
-- |
| 1.9 |
48hr, Oryzias latipes, MITI 1992 |
| |
-- |
| 1.53 |
96 hr, Pimephales promelas |
| 1.32 |
96 hr, Pimephales promelas, Geiger et al. 1985 |
| |
| EC50 values to fishes, mg/l : |
| 0.84 |
96hr, Salmo gairdneri, USEPA 1984 |
| |
| NOEC values to fishes, mg/l : |
| 0.069 |
0.069 - 0.207, 32d, Pimephales promelas |
| 0.207 |
USEPA 1984 |
References |
| 1848 | Anon. 1987a.
The list of the existing chemical substances tested
on biodegradability by microorganisms or bioaccumulation in
fish body by Chemicals Inspection & Testing Institute.
Ministry
of International Trade and Industry, MITI.
Japan. |
| 3107 | AQUIRE 1993 -.
Aquatic Toxity Information Retrieval Database.
U.S.Environmental Protection Agency, Office of Pesticides and
Toxic Substances, Washington, D.C.
|
| 3183 | BUA 1989a.
BUA-Stoffberich 34: Hexachloroethane.
Gesellschaft
Deutscher Chemiker.
|
| 207 | Buccafusco, R.J., Ells, S.J. & LeBlanc, G.A. 1981.
Acute
toxicity of priority pollutants to bluegill (Lepomis
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|
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Environm.
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| 1123 | Phipps, G.L. & Holcombe, G.W. 1985.
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| 2418 | Tarkpea, M. et al. 1985.
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