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Auto flammability

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auto-ignition temperature (liquids)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
17 - 23 May 2017
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)
GLP compliance:
Key result
Auto-ignition temperature:
320 °C
Atm. press.:
>= 1 004 - <= 1 014 hPa

Preliminary Test

An approximate value of the ignition temperature of the test item was first determined by a preliminary test. The following table summarizes the results of the preliminary test. An “ignition” is indicated as “+” and “no ignition” as “-“. 5 drops were added into the Erlenmeyer flask at each temperature.


Results of the preliminary test


Preliminary test

Temperature / °C






Ignition / +/-







Atmospheric pressure: 1014 hPa


In the preliminary test, an ignition was observed at 354 °C.


Main Test

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


322 °C

319 °C

1004 - 1014 hPa


322 °C

321 °C

1011 hPa


323 °C

320 °C

1010 hPa


Based on results of the main test series, the lowest auto-ignition temperature was 322 °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 320 °C.


Final Results

The test item has an auto-ignition temperature of 320 °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 320 °C (at 1004-1014 hPa) was determined for the test substance according to E.U. Method A.15.

Description of key information

Auto-ignition temperature: 320 °C at 1004-1014 hPa (E.U. Method A.15)

Key value for chemical safety assessment

Additional information