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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

4,4’-Methylenedicyclohexyl diisocyanate hydrolyses rapidly in the presence of water. Hydrolysis product -, beside oligomeric and polymeric ureas - is methylene bis(4-cyclohexylamine). In water, a hydrolysis half-life for 4,4’‑methylenedicyclohexyl diisocyanate of approximately 2 hours was determined experimentally. Due to the rapid hydrolysis of 4,4’-methylenedicyclohexyl diisocyanate, equilibrium partitioning of the substance between environmental compartments is unlikely. Consequently, a calculation of the Henry’s Law Constant and of the distribution between the environmental compartments according to the Mackay fugacity model level 1 is not suitable.