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Description of key information

3.0 % (lower limit) and 16.0 % (upper limit) at room temperature

Key value for chemical safety assessment

highly flammable

Additional information

NFPA (2002) published flammable limits of 3.0 % (lower limit) and 16.0 % (upper limit) for acetonitrile at room temperature. Grayson (1985) and Sax (1989) published flammable limits of 4.4% (lower limit) and 16% (upper limit) for acetonitrile.

Justification for classification or non-classification

Acetonitrile is classified as a Category 2 Flammable Liquid (H225: Highly flammable liquid and vapour). This is based on the CLP criteria (EC 1272/2008) of flash point <23 deg C and initial boiling point >35 deg C.