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relative self-ignition temperature (solids)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
Between 20 May 2012 and 04 October 2012.
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Study conducted in compliance with agreed protocols, with no or minor deviations from standard test guidelines and/or minor methodological deficiencies, which do not affect the quality of the relevant results. The study report was conclusive, done to a valid guideline and the study was conducted under GLP conditions, however no formal claim of GLP compliance was made.
according to guideline
EU Method A.16 (Relative Self-Ignition Temperature for Solids)
Version / remarks:
30 May 2008
GLP compliance:
Key result
Remarks on result:
no self ignition observed under the test conditions
The test item has been determined not to have a relative self-ignition temperature below 400°C


The test item was a white granular solid. Whilst heating the test item, a sharp rise in the temperature of the sample, with a peak at an oven temperature of approximately 115°C was registered on the temperature curve (see attached temperature curve). This indicates self-heating but it is not regarded as self-ignition as the temperature of the peak was below 400°C. On completion of the test, the cube was empty and a dark brown solid was observed on the base of the cube stand.

ATMP-N-Oxide-H has been determined not to have a relative self-ignition temperature below 400°C. The result is considered to be reliable.
Executive summary:

Testing was conducted using a procedure designed to be compatible with Method A16 Relative Self-Ignition Temperature for Solids of Commission Regulation (EC) No 440/2008 of 30 May 2008.



The test item has been determined not to have a relative self-ignition temperature below 400°C.

Description of key information

Relative self-ignition temperature [ATMP-N-Oxide-H)]: No evidence of relative self-ignition observed below the 400°C (Atwal, 2012). Self-heating occurred at approximately 115˚C, but is not regarded as self-ignition. This result is read across to the registration substance.

Key value for chemical safety assessment

Additional information

The relative self-ignition temperature of the parent acid, ATMP-N-Oxide-H was attempted in accordance with a relevant test method. Under the conditions of the study, no relative self-ignition below 400˚C was observed for ATMP-N-Oxide-H. Self-heating occurred at approximately 115˚C, but this is not regarded as self-ignition (Atwal, 2012). This result is read-across to ATMP-N-Oxide-5K.