| Chemical |
Dimethyl sulfate |
| CAS-number : |
77-78-1 |
| |
| Synonyms : |
| Dimetyylisulfaatti |
| |
| Sumformula of the chemical : |
| C2H6O4S |
| EINECS-number : |
| 2010581 |
| |
| Molecular weight : |
126.14 |
| |
| Photochemical degradation in air : |
Photooxidation half-life in air:
1.5d - 15.2d,
based upon estimated rate constant for vapor phase reaction
with hydroxyl radicals in air (Howard 1991).
|
| |
| Hydrolysis in water : |
First-order hydrolysis half-life:
1.2hr,
based upon overall rate constant (Kh = 1.6 x 10-4sec-1)
at pH 7 and 25°C (Howard 1991).
|
| |
| Half-life in air, days : |
| 1.5 |
1.5d - 15.2d |
| 15.2 |
scientific judgement based upon estimated |
| |
photooxidation half-life in air, |
| |
Howard 1991 |
| |
| Half-life in soil, days : |
| 0.05 |
1.2hr - 12hr, |
| 0.5 |
Low t1/2 based upon measured overall hydrolysis |
| |
rate constant pH 7 at 25°C, |
| |
Howard 1991 |
| |
| Half-life in water, days : |
| 0.05 |
1.2hr - 12hr, |
| 0.5 |
in surface water, Low t1/2 based upon measured |
| |
overall hydrolysis rate constant for pH 7 at 25°C, |
| 0.05 |
1.2hr - 12hr, |
| 0.5 |
in ground water, low t1/2 based upon measured |
| |
overall hydrolysis rate constant for pH 7 at 25°C, |
| |
Howard 1991 |
| |
| Aerobic degradation in water : |
Aerobic half-life:
7d - 4w,
scientific judgement (Howard 1991).
|
| |
| Anaerobic degradation in water : |
Anaerobic half-life:
28d - 16w,
scientific judgement (Howard 1991).
|
| |
| Health effects : |
Skin and eye irritation data:
Skin, rabbit: 10 mg, 24 hr, open, severe;
eye, rabbit; 100 mg, 4 s, rinse, severe;
eye, rabbit, 0.05 mg, 24 hr, severe (Sweet 1987).
|
| |
| Carcinogenicity : |
Carcinogenic (Anon. 1974).
|
| |
| LC50 values to fishes, mg/l : |
| 7.5 |
srv,act, 96 hr, Lepomis macrochirus, |
| 15 |
srv,act, 96 hr, Menidia audens, |
| |
Dawson et al. 1977 |
References |
| 61 | Anon. 1974a.
Federal Register 39 (125), June 1974-subpart G:
Occupational health and environmental control. |
| 327 | Dawson, G.W., Jennings, A.L., Drozdowski, D. & Rider, E.
1977a.
The acute toxicity of 47 industrial chemicals to fresh
and saltwater fishes.
J.
Hazardous Materials 1 (1975/77): 303
- 318. |
| 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.
|
| 2101 | Sweet, D. 1987.
Registry of toxic effects of chemical
substances 1985 - 1986 edition.
U.S.
Department of health and
human services. |
