Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information


Direct photolysis in air, water and soil

The UV Spectrum of the registration substance shows a small shoulder at >290 nm so that direct photolysis may occur.

Indirect photolysis in air, water and soil

Indirect photolysis via OH radical or ozone reaction is fast (Half-life 0.5 -1d). This means indirect photolysis is a possible fate pathway.


N-Methyl acetamide, CAS No. 79-16-3 has a half-life of 38000 years (pH7, 25 deg C, Reference: Mabey, W. and Mill, T.  1978.  Critical Review of Hydrolysis of Organic Compounds in Water Under Environmental Conditions.   J. Phys. Chem. Ref. Data  1978, 7(2): 383-415). Hall et al have compared the rate of the alkaline hydrolysis of cyclic imides e.g. N-Methyl succinimide, CAS No. 1121-07-9 with the rate measured for the corresponding acyclic substance e.g. N-Methyl acetamide. They found equal or slower hydrolysis for the cyclic compound. The registration substance contains a (cyclic) N-alkyl succinimide moiety and it can be concluded that hydrolysis under environmental conditions (pH 4 to 9, 12 deg C) is comparable to N-Methyl acetamide mentioned before. Because of this extremely long half-life a hydrolysis study is not warranted.