Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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


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Administrative data

Link to relevant study record(s)

Description of key information

Since the test substance is a liquid, the flammability is described by the flash point. 
Furthermore, testing for pyrophoric properties and flammability on contact with water is not necessary due to the absence of structural alerts and the existing experience with handling and use of the test substance (R.7a, ECHA, 2008).

Key value for chemical safety assessment

highly flammable

Additional information

Justification for classification or non-classification

Butyl isocyanate has a flash point of 11 °C (Chemsafe, 2000).

Butyl isocyanate does neither hold pyrophoric properties, nor emits flammable gases on contact with water.

Based on the available information, butyl isocyanate has to be classified as:

- highly flammable (R11), reacts violently with water (R14) (Directive 67/548/EEC)

- highly flammable liquid and vapour (Flam. Liquid 2, H225) (Regulation EC 1272/2008)