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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Physical & Chemical properties

Stability in organic solvents and identity of relevant degradation products

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Administrative data

Link to relevant study record(s)

Description of key information

 In protic solvents like alcohols, isocyanates react rapidly. Stablility is expected with non-protic solvents like toluene, acetone, dioxane etc. Isocyanates form urethanes in alcohol. The concentration of HDI trimer in an acetonitrile solution without addition of water was stable within 26 hours.

Additional information


- Beyer, 2004

- Bayer AG, 1999


"in house" method "Determination of the NCO-content by dibutylamine titration"