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Physical & Chemical properties

Auto flammability

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Description of key information

Screening information on the auto-flammability potential of solid substances at elevated temperatures according to EU-method A.16 is provided. According to "column 2" in Annex VII, of REGULATION (EC) No 1907/2006, no further studies need to be conducted if these preliminary results do exclude self-heating of the substance up to 400 °C.

Results:

Relative self-ignition temperature (EU-method A.16): >400 °C; no self-ignition observed, the test-item is not auto-flammable.

In conclusion, no further information on auto-flammability is needed.

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
400 °C

Additional information

EU-Method A.16 was performed to attain screening information on the auto-flammability potential of the solid submission substance at elevated temperatures. Using a linear increase in temperature of about 0.5 °C/min, the test item showed no relevant exothermic reaction. A slight exothermic effect was recorded at about 320 °C with the peak at 330 °C oven temperature (367 °C maximum sample temperature, i.e. 37 °C higher than the oven temperature). Afterwards, the sample temperature was approaching oven temperature within approximately 1 hour. This slight exothermic effect is not due to self-heating of the test item, because this oven temperature (330 °C) already approximately corresponds to the decomposition temperature (350 °C) of the submission substance. At the end of the measurement the test item was carbonized and coloured black.

According to (1), data from EU-method A.16 may be evaluated on the basis of the raw data in analogy to the Grewer Oven Test, and can then be used as a screening test on self-heating properties. The careful and detailed evaluation of the time-temperature plot attached to the study report conclusively demonstrates that for the submission substanceno classification requirements do exist with regard to self heating according to REGULATION (EC) No 1272/2008 (CLP).

 

(1) Guidance on the Application of the CLP Criteria; ECHA-15-G-05-EN, June 2015