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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:
February and March 2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Remarks:
The study was conducted according to an internationally recognised method. No deviation affected the quality of the study. The substance is considered to be adequately characterised with composition. Therefore validation applies without restrictions.
Qualifier:
according to
Guideline:
EU Method A.15 (Auto-Ignition Temperature (Liquids and Gases))
Version / remarks:
Regulation (EC) n°440/2008
Qualifier:
according to
Guideline:
other: NF T 20-037
Version / remarks:
(now repealed)
Qualifier:
equivalent or similar to
Guideline:
other: IEC 79-4
Version / remarks:
(1975)
Qualifier:
equivalent or similar to
Guideline:
DIN 51794 (Testing of mineral oil hydrocarbons - Determination of ignition temperature)
Qualifier:
equivalent or similar to
Guideline:
BS-4056 (Method of test for ignition temperature of gases and vapours)
GLP compliance:
no
Remarks:
not required for physchem data, unless relating to CLP
Key result
Auto-ignition temperature:
274 °C
Atm. press.:
97.3 kPa

Preliminary test

The lowest auto-ignition temperature was found around 275 °C (corrected value) with a volume of 150 μL. Time lag was 106 seconds, atmospheric pressure was 97.9 kPa, and 34% relative humidity.

Main test

The volume of test item injected in the oven was 150 μL.

Only the self ignition runs for each assay are summarized in the table below:

 Assay n°  Auto-Ignition Temperature (corrected) °C  Time lag (s)  Atmospheric pressure (kPa)  Relative humidity (%)
 1  274  123  97.4  44
 2  274  117  97.3  40
 3  277  97  97.2  31
 4  276  123  97.1  32
 5  275  98  97.0  27

For safety reasons, the retained Ignition temperature was the lowest temperature at which ignition occurs, i.e. 274 °C ± 3 °C (corrected temperature ± accuracy).

Conclusions:
This parameter/method is not relevant for classification, however the information is useful regarding process safety and potential additional fire hazard. No particular hazard is anticipated in normal conditions of storage.
Executive summary:

The auto-ignition temperature of the test substance was measured according to NF T 20-037 method (listed in EU A15 guideline).

Test material was injected into a heated flask, until the lowest temperature at which ignition occurs was determined. The relevant parameters (volume, time lag, atmospheric pressure) were recorded for the final result. The lowest value of five consistent replicates was retained.

The test substance has been determined to have an auto-ignition temperature of 274 °C.

Description of key information

Experimental Auto-Ignition Temperature = 274 °C under 97.3 kPa.

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
274 °C

Additional information

A fully reliable experimental study, conducted according to a recognized EU/NF method, is available. It is considered as a key study, and the result is retained as key data.

This parameter is not relevant for classification, however the information is useful regarding process safety and potential additional fire hazard.

No particular hazard is anticipated in normal conditions of storage.