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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

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Environmental fate & pathways

Henry's Law constant

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Administrative data

Link to relevant study record(s)

Description of key information

Hydrolysis inhibits establishing a steady concentration in the aqueous phase. Therefore a study is technically not feasible.
Henry´s law constant was estimated using HENRYWIN v. 3.20 to be 1.25 Pa * 10 E-09 Pa m3/mol at a temperature of 25 °C. For the calculation the main constituent of HDI Trimer (Isocyanaurate , n=3) was chosen.

Key value for chemical safety assessment

Henry's law constant (H) (in Pa m³/mol):
at the temperature of:
25 °C

Additional information

Environmental distribution considerations for diisocyanate are of little relevance because the reaction with water is expected to eliminate the substance from the environment rapidly.