| Chemical |
Hydrogen cyanide |
| CAS-number : |
74-90-8 |
| |
| Synonyms : |
| HCN |
| hydrocyanic acid |
| vetysyanidi |
| |
| Sumformula of the chemical : |
| CHN |
| EINECS-number : |
| 2008216 |
| |
| State and appearance : |
colourless gas or liquid
|
| |
| Molecular weight : |
27.03 |
| |
| Vapor pressure, mmHg : |
| 620 |
20°C |
| |
| Melting point, °C : |
| -13.3 |
|
| |
| Boiling point, °C : |
| 25.6 |
|
| |
| Photochemical degradation in air : |
Photooxidation half-life in air:
89.1d - 2.4yr,
scientific judgement based upon measured rate data for the
vapor phase reaction with hydroxyl radicals in air
(Howard 1991).
|
| |
| Half-life in air, days : |
| 89.1 |
89.1d - 2.4yr, |
| 876 |
based upon photooxidation half-life in air, |
| |
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, |
| 180 |
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 acclimated aerobic screening
test data (Howard 1991).
|
| |
| Anaerobic degradation in water : |
Anaerobic half-life:
16w - 24mo,
scientific judgement based upon estimated aqueous aerobic
biodegradation half-life (Howard 1991).
|
| |
| LD50 values to mammals in oral exposure, mg/kg : |
| 3.7 |
orl-mus, Lewis & Sweet 1984 |
| |
| LDLo values to mammals in oral exposure, mg/kg : |
| 0.57 |
orl-hmn, Lewis & Sweet 1984 |
| 2 |
orl-pig, - " - |
| |
| LCLo values to mammals in inhalation exposure, mg/kg : |
| 120 |
1 hr, ihl-hmn, Lewis & Sweet 1984 |
| |
| LCLo values to mammals in inhalation exposure, ppm : |
| 323 |
5 min, ihl-mus, Lewis & Sweet 1984 |
| |
| LC50 values to crustaceans, mg/l : |
| 0.17 |
96 hr, Gammarus pseudolimnaeous, |
| |
Verschueren 1983 |
| |
| LC50 values to fishes, mg/l : |
| 0.125 |
96hr, Pimephales promelas |
| 0.057 |
96 hr, Salmo gairdneri, Broderius & |
| |
Smith 1979 |
References |
| 191 | Broderius, S.J. & Smith, L.L. 1979.
Lethal and sublethal
effects of binary mixtures of cyanide and hexavalent chromium,
zinc, or ammonia to the fathead minnow (Pimephales
promelas) and rainbow trout (Salmo gairdneri).
J.
Fish.
Res.
Bd.
Can. 36: 164. |
| 3120 | Howard, P.H., Boethling, R.S., Jarvis, W.F., Meylan, W.M. &
Michalenko, E.M., Handbook of Environmental Degradation Rates,
1991.
Lewis Publicers, Inc., Chelsea, Michigan, U.S.A.,
pp. 725.
|
| 1589 | Lewis, R.J. & Sweet, D.V. 1984.
Registry of toxic effects of
chemical substances.
National Institute for Occupational Safety
and Health.
No. 83-107-4. |
| 1468 | Verschueren, K. 1983.
Handbook of environmental data of
organic chemicals.
Van Nostrand Reinhold Co.
Inc., New York.
1310 s. |
