Registration Dossier

Diss Factsheets

Physical & Chemical properties

Auto flammability

Currently viewing:

Administrative data

Link to relevant study record(s)

Description of key information

The auto-ignition temperature of the test material has been determined to be 570 °C at 1007.5 to 1024.2 hPa.

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
570 °C

Additional information

The auto-ignition temperature of the test material was determined in a study that was performed under GLP conditions and in accordance with the standardised guidelines EU Method A.15., DIN Guide 51794 and IEC standard 79-4. The study has been assigned a reliability score of 1 in line with the principles for assessing data quality as defined by Klimisch et al. (1997).

The auto-ignition temperature of the test material was determined using a commercially available auto-ignition temperature apparatus. In every ignition test, liquefied test material was introduced into a preheated test vessel using a volumetric pipette. It was observed visually whether a reaction (clearly perceptible flame and/or explosion) of the sample within five minutes after introduction took place at the prevailing temperature.

In the preliminary test, starting at 200 °C, for every 20 °C temperature rise, 70 µL test material was introduced into the test vessel until ignition of the test material was first observed (i.e. at 620 °C). Starting at 630 °C, for every 5 °C decrease, 70 µL test material was tested until no ignition had been observed. The temperature at which ignition was last observed is the estimated auto-ignition temperature.

Three main tests were performed with three volumes of test material per test. Starting at the “high temperature”, for every 2 °C decrease, the prevailing volume of test material was tested until no ignition of the test material had been observed. The temperature at which ignition was last observed is the auto-ignition temperature at the sample volume applied. This procedure was repeated with the other volumes until a minimum auto-ignition temperature for each test was obtained. With these results the auto-ignition temperature of the test material was determined.

Under the conditions of the study, the auto-ignition temperature of the test material has been determined to be 570 °C at 1007.5 to 1024.2 hPa.