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Physical & Chemical properties

Flammability

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Reference
Endpoint:
flammable solids
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
study well documented, meets generally accepted scientific principles, acceptable for assessment
Qualifier:
according to guideline
Guideline:
other: UN-Brennbarkeitstests Klasse 4.1.
Specific details on test material used for the study:
No further details available.
Key result
Test procedure:
burning rate test over 100 mm length
Burning time:
46 s
Remarks on result:
other: average of two measurements

The burning time was measured twice on a 100mm powder train.

Experiment 1: 48s

Experiment 2: 44s

Average burning rate: 46s/100mm.

Interpretation of results:
not classified based on GHS criteria
Conclusions:
The test substance was determined to be readily combustible.
Executive summary:

The burning rate of the test substance was determined via the propagation of combustion over a 100 mm long powder train. The average observed burning rate is 46s/100mm.

According to the criteria described in Regulation (EC) 1272/2008 on classification, labelling and packaging of substances and mixtures (CLP), classification as a flammable solid is required when the burning rate is more than 2.2 mm/s. This corresponds to a burning time of 45s/100mm or less. Based on an average observed burning rate of 46s/100 for L-isoleucine, classification of the substance as a flammable solid is not required.

Description of key information

The average observed burning rate for L-isoleucine is 46s/100mm.

Key value for chemical safety assessment

Flammability:
not classified

Additional information

The burning rate of the test substance was determined via the propagation of combustion over a 100 mm long powder train. The average observed burning rate is 46s/100mm.

Justification for classification or non-classification

According to the criteria described in Regulation (EC) 1272/2008 on classification, labelling and packaging of substances and mixtures (CLP), classification as a flammable solid is required when the burning rate is more than 2.2 mm/s. This corresponds to a burning time of 45s/100mm or less. Based on an average observed burning rate of 46s/100 for L-isoleucine, classification of the substance as a flammable solid is not required.