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auto-ignition temperature (liquids)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
19 to 21 October 2016
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
according to guideline
EU Method A.15 (Auto-Ignition Temperature (Liquids and Gases))
according to guideline
DIN 51794 (Testing of mineral oil hydrocarbons - Determination of ignition temperature)
according to guideline
other: DIN EN 14522 (2005): Determination of the Ignition Temperature of gases and liquids
GLP compliance:
Key result
Auto-ignition temperature:
270 °C
Atm. press.:
ca. 1 000 hPa



Preliminary Test

An approximate value of the ignition temperature of the test item was first determined by a preliminary test. The results of the preliminary test are summarized in the table below. An “ignition” is indicated as “+” and “no ignition” as “-“. 5 drops were added into the Erlenmeyer flask at each temperature. In the preliminary test, an ignition was observed at 290 °C.


Results of the preliminary test

Temperature / °C






Ignition / +/-







Atmospheric pressure: 1004.7 hPa


Main Test

The lowest temperatures at which an ignition occurred in the main tests are given in the following table.


Lowest temperatures at which an ignition occurred

Main test series

Lowest temperatures of an ignition

Highest temperatures without an ignition

Atmospheric Pressure


274 °C

270 °C

1000.2 – 1000.7 hPa


274 °C

270 °C

999.9 hPa


274 °C

271 °C

1001.4 hPa


Based on results of the main test series, the lowest auto-ignition temperature was 274 °C.

Regulation EC No. 440/2008 and DIN 51794: The auto-ignition temperature rounded down to the nearest multiple of 5 °C was determined as 270 °C.


Final Results

The test item has an auto-ignition temperature of 270 °C according to the Regulation EC No. 440/2008 Method A.15. Auto-Ignition Temperature (Liquids and Gases) and DIN 51794 (2003): Determination of Ignition Temperature.

An auto-ignition temperature value of 270 °C (at ca. 1000 hPa) was determined for the test substance according to E.U. Method A.15.

Description of key information

Auto-ignition temperature: 270 °C at 1000 hPa (EU Method A.15)

Key value for chemical safety assessment

Additional information