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auto-ignition temperature (liquids)
Type of information:
experimental study
Adequacy of study:
supporting study
Study period:
From 29 June 2009 to 01 July 2009
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
The study was conducted according to an internationally recognised method, and under GLP. No deviation was reported. Substance ID is adequately specified with purity. Therefore full validation applies.
according to
EU Method A.15 (Auto-Ignition Temperature (Liquids and Gases))
Version / remarks:
Regulation (EC) No 440/2008
according to
IEC 60079-4 (Electrical apparatus for explosive gas atmospheres. Part 4: Method of test for ignition temperature)
Version / remarks:
Anon (1987), Electrical apparatus for explosive gas atmospheres. Part 4: Method of test for ignition temperature. IEC Publications 79-4, p1-19.
GLP compliance:
yes (incl. certificate)
inspection 19/08/2008, signature 4/3/2009
Specific details on test material used for the study:
Storage conditions: approximately 4ºC in the dark under nitrogen
Key result
Auto-ignition temperature:
400 °C
Atm. press.:
101.79 - 102.18 kPa

Detailed determinations are available in the experimental report.

accuracy: +/-5°C

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 under GLP according to IEC 79-4 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 were recorded for the final result.

The test material has been determined to have an auto-ignition temperature of 400 ± 5 °C.

relative self-ignition temperature (solids)
Data waiving:
study scientifically not necessary / other information available
Justification for data waiving:
the study does not need to be conducted because the substance is a solid having a melting point <= 160°C
Justification for type of information:
In accordance with column 2 of REACh Annex VII, the study does not need to be conducted for solids, if the substance has a melting point ≤ 160 °C, or if preliminary results exclude self-heating of the substance up to 400 °C. As presented under Section 4.2, the substance has a melting point of 35°C, therefore no additional information is required.
Reason / purpose:
data waiving: supporting information

Description of key information

AIT = 400°C, tested as liquid (melted substance)

No further testing required.

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
400 °C

Additional information

Based on the melting point of 35°C (refer to point 4.2), testing for self-ignition can be waived (solid with mp<160°C). Moreover, considering the ignition failure in the flammability test, in the presence of a flame (under 4.13), self-ignition seems unlikely for the substance in common conditions of storage, handling and use.

However, a fully reliable study, conducted according to a recognized EU method and under GLP, is available for the melted (liquid) substance. The result supports the above predicted behaviour towards heating, and is retained as key value.