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Diss Factsheets

Physical & Chemical properties

Auto flammability

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Description of key information

Under the conditions of the study, the auto-ignition temperature of the test material was determined to be 365 ± 5 °C.

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
365 °C

Additional information

The auto flammability of the test material was investigated in a study which was performed under GLP conditions and in accordance with the standardised guidelines EU Method A.15 and ASTM-E 659-78. The study was assigned a reliability score of 1 in accordance with the criteria for assessing data quality set forth by Klimisch et al. (1997).

The apparatus consisted of an insulated, round bottomed, wide necked flask contained within an oven. A recording thermocouple, coupled to a chart recorder, was fitted to monitor the temperature of the flask interior. The required volume (initially 100µL) of test substance was injected as droplets from a syringe into the centre of the flask, taking care to avoid wetting the walls of the flask during injection. The syringe was then withdrawn and the chart recorder started. The time when a flame was observed was recorded on the chart recorder, and the test was run for at least five minutes if ignition was not observed. The procedure was repeated at different temperatures and with different sample volumes until the minimum value of the ignition temperature was obtained. Between each test, the flask was flushed completely with air, and after flushing, a sufficient time interval was allowed before the next sample was injected to ensure that the flask contents re-equilibrated with air, and were stabilised at the desired temperature. The tests were made at appropriate temperatures until the lowest temperature at which ignition occurs had been determined. The auto-ignition temperature of the test material was 365 ± 5 °C, the atmospheric pressure at time of testing was 99.7 kPa.

Under the conditions of the study, the auto-ignition temperature of the test material was determined to be 365 ± 5 °C.