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EC number: 216-263-1
CAS number: 1538-75-6
a flashpoint of 72.5 °C trimethylacetic anhydride is a non-flammable
liquid in the sense of the CLP-Guideline.
Pyrophoric properties: Trimethylacetic anhydride did not deliver
indications of pyrophoric properties during the realization of other
tests. The determination according to UN-MTC Procedure N.3
is not necessary.
Contact with water: A review of the structure suggests that there
are no chemical groups present that would imply pyrophoric properties or
flammability on contact with water. A review of handling and used
implies no pyrophoric properties or flammability on contact with water.
Self-heating substances: Trimethylacetic anhydride is known to be
stable in contact with air at room temperature for prolonged periods of
time (days) and hence, the classification procedure does not need to be
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