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Physical & Chemical properties

Stability in organic solvents and identity of relevant degradation products

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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

Reference:

- Beyer, 2004

- Bayer AG, 1999

Guideline:

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