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Physical & Chemical properties

Auto flammability

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auto-ignition temperature (liquids)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
according to guideline
EU Method A.15 (Auto-Ignition Temperature (Liquids and Gases))
Principles of method if other than guideline:
The test is conducted in accordance with the procedure described in EU Regulation (EC) 440/2008, Annex Part A test A.15.

The test covers the determination of hot and cool flame autoignition temperatures of a liquid chemical in air at atmospheric pressure in a uniformly heated vessel. A small, metered sample of the product to be tested is inserted into a uniformly heated 500 ml glass flask containing air at a predetermined temperature. The contents of the flask are observed in a dark environment for 10 minutes following insertion of the sample, or until autoignition occurs. Autoignition is identified by the sudden appearance of a flame inside the flask and by a sharp rise in the temperature of the gas mixture. The lowest internal flask temperature at which the hot-flame ignition occurred for a series of prescribed sample volumes is taken to be the hot-flame autoignition (AIT) of the chemical in air at atmospheric pressure. Ignition delay times (ignition time lags) are measured in order to determine the ignition delay / ignition temperature relationship. The lowest temperature at which cool flames (CFT) are observed is also recorded. In all instances the ignition delay times are recorded.
GLP compliance:
yes (incl. QA statement)
Key result
Auto-ignition temperature:
257 °C
Atm. press.:
101.9 kPa
Remarks on result:
other: No cool flames were observed. Ignition produced an orange / pink flame.

Hot flame autoignition temperature (AIT, C) : 257

Including correction factor for barometric pressure (°C) : 257

Time lag to autoignition (s) : 131

Barometric pressure (kPa) : 101.9

Test Item quantity (μl) : 200

Relative Humidity (%) : 61

Description of key information

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
257 °C

Additional information