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Reference
Endpoint:
auto-ignition temperature (liquids)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2008-09-17 to 2008-10-17
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:
EEC Directive 92/96, Annex, Part A
Deviations:
no
Qualifier:
according to guideline
Guideline:
DIN 51794 (Testing of mineral oil hydrocarbons - Determination of ignition temperature)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Key result
Auto-ignition temperature:
355 °C
Atm. press.:
98 600 Pa

The requirements for repeatability of the DIN standard are stated as follows: Three lowest values of the main study have to lie within a range of 10 K (if auto ignition temperature is below 300 °C) respectively 20 K (if auto-ignition temperature is above 300 °C).


The following lowest values were recorded:






















Experiment



Value



First Test Series



367 °C



Determination of Lowest Value



358.5 °C



Repetition



365 °C



The lowest value of the auto-ignition temperature is 358.5 °C. This value was determined using 20 drops test item. The test item showed auto-ignition after 8 seconds. The auto-ignition temperature (result of determination) is the lowest value from the lowest values of the three experiments, rounded down to a whole multiple of 5 °C. Therefore, the auto-ignition temperature is stated as 355 °C. The three lowest values of the main study lay within a range of 20 K (as required for auto-ignition temperatures above 300 °C).

Conclusions:
The auto-ignition temperature was determined to be 355 °C under the test conditions.
Executive summary:

The study was conducted according to procedure and demands of EU-Method A. 15 and DIN 51794. The lowest value of the auto-ignition temperature is 358.5 °C. This value was determined using 20 drops test item. The test item showed auto ignition after 8 seconds. The auto-ignition temperature (result of determination) is the lowest value from the lowest values of the three experiments, rounded down to a whole multiple of 5 °C. Therefore, the auto-ignition temperature is stated as 355 °C.

Description of key information

An auto-ignition temperature of 355 °C at 98600 Pa was determined in accordance with EU-Method A.15 and DIN 51794.

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
628.15 K

Additional information

The study was conducted according to procedure and demands of EU-Method A. 15 and DIN 51794. The lowest value of the auto-ignition temperature is 358.5 °C. This value was determined using 20 drops test item. The test item showed auto-ignition after 8 seconds. The auto-ignition temperature (result of determination) is the lowest value from the lowest values of the three experiments, rounded down to a whole multiple of 5 °C. Therefore, the auto-ignition temperature is stated as 355 °C.