Registration Dossier

Data platform availability banner - registered substances factsheets

Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Ecotoxicological information

Endpoint summary

Administrative data

Description of key information

Additional information

3-isocyanatomethyl-3,5,5-trimethylcyclohexyl isocyanate homopolymer hydrolyses upon contact with water. The diisocyanate groups of the substance react by forming amines and CO2. The amines formed may react further with unreacted diisocyanate groups of 3-isocyanatomethyl-3,5,5-trimethylcyclohexyl isocyanate homopolymer resulting in oligo- and subsequently polyurea components.Test substance solutions of 3 -isocyanatomethyl-3,5,5 -trimethylcyclohexyl isocyanate homopolymer were prepared at nominal concentrations that were some orders of magnitude higher than the maximum water solubility. The solutions were stirred for 18 to 24 hours and insoluble particles were filtered off. Substance concentrations were determined as DOC/TOC. No effects were observed in any of the tested species (Daphnia, algae, fish) up to the limit of the water solubility (1.5 mg/L) of the test substance. The lowest endpoint derived for fish (Cyprinus carpio) LC50, 96 h, was >1.5 mg/L. No mortaility of any fish was observed at this concentration (highest soluble loading of test substance).