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Physical & Chemical properties

Flammability

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Description of key information

Key value for chemical safety assessment

Flammability:
non flammable

Additional information

Justification for classification or non-classification

Inorganic oxides in which the inorganic element is in its highest possible oxidation state are incapable of further reaction with oxygen and can thus be designated as non-flammable. The oxidation state of phosphorus in phosphoric acid is in its highest possible state (+5) and thus phosphoric acid can be considered as non flammable.

Based on the daily use and handling of phosphoric acid, it is concluded that this substance has no pyrophoric properties and is not flammable in contact with water.