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Physical & Chemical properties

Auto flammability

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Reference
Endpoint:
auto-ignition temperature (liquids)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
from 2021-07-26 to 2021-07-30
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
EU Method A.15 (Auto-Ignition Temperature (Liquids and Gases))
Version / remarks:
2008
Deviations:
no
Qualifier:
according to guideline
Guideline:
DIN 51794 (Testing of mineral oil hydrocarbons - Determination of ignition temperature)
Version / remarks:
2005
Deviations:
no
GLP compliance:
no
Key result
Auto-ignition temperature:
250 °C
Atm. press.:
>= 999.2 - <= 1 001.4 hPa

Preliminary Test


An approximate value of the ignition temperature of the test item was first determined by a preliminary test. Table 1 gives the result of the preliminary test. An ignition is denoted as “+” and no ignition is denoted as “-“. 5 drops were put into the Erlenmeyer flask at each temperature.


Table 1: Results of the preliminary test (atmospheric pressure 999.2 hPa)


































































Temperature / °C



Ignition / +/-



206



-



255



-



306



-



358



+



350



+



337



+



326



+



316



+



307



+



396



+



287



+



276



+



267



+



258



-



In the preliminary test, the lowest temperature at which an ignition occurred was 267 °C.


 


Main Test


The lowest temperatures at which an ignition occurred in the main test are given Table 2.


Table 2: Lowest temperatures at which an ignition occurred






























Main test series



Lowest temperatures of an ignition



Highest temperatures without an ignition



Atmospheric Pressure



1



256 °C



255 °C



1000.2 – 1001.4 hPa



2



255 °C



253 °C



999.3 – 1000.9 hPa



3



261 °C



260 °C



999.2 hPa



Based on results of the main test series, the lowest auto-ignition temperature was 255 °C.


The auto-ignition temperature rounded down to the nearest multiple of 5 °C was determined as 250 °C.

Conclusions:
The auto-ignition temperature of the test item was determined to be 250 °C.
Executive summary:

An experimental study was conducted to determine the auto-ignition temperature of the test item according to Regulation (EC) No 440/2008 and DIN 51794. In the preliminary test, the lowest temperature at which an ignition occurred was 267 °C. Based on results of the main test series, the lowest auto-ignition temperature was 255 °C. The auto-ignition temperature rounded down to the nearest multiple of 5 °C was determined as 250 °C.

Description of key information

The auto-ignition temperature of the test item was determined to be 250 °C.

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
250 °C

Additional information

An experimental study was conducted to determine the auto-ignition temperature of the test item according to Regulation (EC) No 440/2008 and DIN 51794. In the preliminary test, the lowest temperature at which an ignition occurred was 267 °C. Based on results of the main test series, the lowest auto-ignition temperature was 255 °C. The auto-ignition temperature rounded down to the nearest multiple of 5 °C was determined as 250 °C.