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Physical & Chemical properties

Flammability

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Description of key information

Not flammable, buring rate test, EU Method A.10, Calmels 1995.

Key value for chemical safety assessment

Flammability:
non flammable

Additional information

The flammability of the test material was determined in a preliminary burning rate test by Calmels (1995), performed under GLP conditions and in line with the standardised guideline EU Method A.10. Based on the principles for assessing data quality defined by Klimisch et al (1997), this study was assigned a reliability score of 1.

The test material, as supplied, was made into a pile of 250 mm length then an attempt was made to ignite the sample using a hot flame (approximate temperature > 1,000°C) from a gas burner (small flame). The flame was applied to one end of the pile of powder for a maximum of 4 minutes. A total of two assays were performed.

No ignition of the test material was observed and no burning rate could be measured. No propagation of flame was recorded along 200mm of the test material train within the 4 minute period. In contact with the flame, sparks were observed. The test material became glowing and blackened. Then, a slight boiling was recorded at the surface of the test material train, near of the ignition source (gas burner).

It was not necessary to carry out further investigation as the preliminary results were considered sufficient for classification.

Under the conditions of the test, the test material is not considered to be highly flammable.

Justification for classification or non-classification

In accordance with criteria for classification as defined in Annex I, Regulation EC No. 1272/2008, the test material does not require classification for flammability.