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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Boiling point

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Description of key information

To fulfil its technical function the substance is designed to decompose before boiling into the de-blocked isocyanate. This behaviour is described in: Macromolecular Research Vol. 13, No. 5, pp 427-434 (2005), Jung Min Lee, Sankaraiah, Young Soo Lee and Jung Hyun Kim, "Thermal Decomposition Behaviour of blocked Diisocyanates Derived from Mixture of Blocking Agents". The temperature range of deblocking ε-caprolactams is reported to be 155 – 180 °C. Actually, the melting point is determined at 177 °C, hence it is obvious and scientifically reasonable that the decomposition will occur before boiling. So, testing of boiling point is scientifically not reasonable and technically not feasible.

Key value for chemical safety assessment

Additional information