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Description of key information

The lower and upper flammability limits of buta-1,2-diene is 1.6-18% by volume in air.

Key value for chemical safety assessment

extremely flammable

Additional information

The Chemsafe (2009) database is supported by BAM (The Federal Institute for Materials Research and Testing. B

AM operates as a national institute for metrology in chemistry in agreement with the Federal Institute of Physics and Metrology (Physikalisch-Technische Bundesanstalt, PTB). On this basis this data is considered reliable and suitable for use as a key study.

Justification for classification or non-classification

On the basis of these upper and lower flammability limits buta-1,2-diene is classified as a Category 1 flammable gas under GHS as it is flammable when in a mixture of 1.6 -18% of less by volume in air, with the hazard statement 'extremely flammable gas'.