Registration Dossier
Registration Dossier
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EC number: 201-058-1 | CAS number: 77-78-1
Water solubility
Administrative data
Link to relevant study record(s)
Description of key information
Water solublity of DMS: 28 g/L at 18°C (reliable handbook data)
(remark: DMS hydrolyses in water)
Key value for chemical safety assessment
Additional information
According to the EU RAR (2002), the half-life of DMS at room temperature and pH 7 is ca. 24 hour; at room temperature and pH 10 it is ca. 86 seconds. Other observed degradation times are: >70 hours at 8°C, 14 hours at 23°C, and 70 min. at 40°C. A second author states a half-life of 1.2 hours for the hydrolysis of DMS under neutral conditions (approx. pH 7) at 25°C. According to Lee et al. (1980) the first methylgroup is removed much more rapidly than the second with hydrolysis of dimethyl sulphate being complete in a 24-hour period in water dilute acid or dilute base; the monomethyl species persists over a period of several weeks. For more information please refer to section 5.1.2 of this technical dossier.
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