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Physical & Chemical properties

Flammability

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Description of key information

No propagation of combustion if contact with a flame.

Key value for chemical safety assessment

Flammability:
non flammable

Additional information

No data is available on the reference substance (anhydrous form), but a reliable experimental study was conducted on analogue, showing no propagation of combustion. Despite the test substance was an hydrated grade, the study is considered suitable for purpose, and then retained as key, because heating will vaporise the crystallisation water, as shown under 4.2, leaving the parent compound.

Moreover, supporting literature data indicates that the substance is used as a fireproofing agent, therefore as a weight of evidence, it should not have flammable properties.

Based on the chemical structure and experience, no flammable properties are anticipated if contact with air or water, therefore studies were deemed unnecessary.

Justification for classification or non-classification

According to Directive 67/548/EEC (DSD) criteria, the substance as solid failed to propagate combustion in the preliminary test, therefore it is not classified as highly flammable.

According to Regulation (EC) No.1272/2008 (CLP) criteria, for the same reason (UN N1 preliminary test identical to EC A10), the substance is not classified as a flammable solid.