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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
Reference:
Composition 0
Qualifier:
according to
Guideline:
other: UN-Brennbarkeitstests Klasse 4.1.
Test material information:
Composition 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:
8.75 min
Remarks on result:
other: actual result: 8 min 44 sec.

The burning time was measured on a 100 mm powder train, and was found to be 8 minutes 44 seconds.

From this, a burning rate of 0.19 mm/s can be calculated.

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 8m 44s/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. Based on the observed burning rate of 0.19 mm/s for L-tyrosine, classification of the substance as a flammable solid is not required.

Description of key information

Burning rate: 0.19 mm/s.

Key value for chemical safety assessment

Flammability:
not classified

Additional information

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. Based on the observed burning rate of 0.19 mm/s for L-tyrosine, classification of the substance as a flammable solid is not required.