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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

According to the ICCA HPV-SIDS from 2002, hydrolysis of chloromethane in water is relatively slow with a half-life ranging from 62 days to about 1.1 year but chloromethane is a gas, most industrial releases would be expected to be to the air and the hydroxyl radical atmospheric half-life is estimated to be approximately one year. Any chloromethane released to surface water or surface soil would be expected to evaporate because its Henry’s law constant and vapour pressure are high. The principal sink for chloromethane in the troposphere is chemical reaction with hydroxyl radicals. Surface deposition and washout are unimportant sinks for methyl chloride (Graedel and Keene, 1995; CICAD, 2000).

The measured octanol/water partition coefficient (log Kow of 0.91) is low, indicating a low potential for bioaccumulation and low tendency of adsorption to soil and sediment.