Registration Dossier
Registration Dossier
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EC number: 234-217-9 | CAS number: 10599-90-3
Endpoint summary
Administrative data
Description of key information
Additional information
Few data are available on the stability of the substance. Monochloramine is produced in aqueous solution and used primarily in water treatment and water cooling system. Thus, surface water is considered as the target compartment of the substance and most of the available data concern kinetics of the substance in water. The substance is considered as unstable in water since Margerum (1978) has shown that hydrolysis of monochloramine results in the release of active chlorine in the form of HOCl in slightly basic and slightly acidic solutions which are considered as representative of environmental conditions. In these conditions, the rate constant equals 1.9E-5 s-1 which corresponds to a T1/2 of 10 hours. This constant rate is confirmed by a study of Vikesland (2001) which mentioned a constant rate of 7.6 x 10E-2 h-1 equivalents to a T1/2 of 9 hours. Moreover, Lin (1983) has shown that the rate constant obtained in first order reaction is influence by pH as well as temperature and it was shown that kinetics of monochloramine in water are different under dark conditions or light conditions.
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