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Reference
Endpoint:
relative self-ignition temperature (solids)
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
EU Method A.16 (Relative Self-Ignition Temperature for Solids)
Deviations:
yes
Remarks:
A 50mm3 (instead of 20 mm3) mesh cube was employed to keep sufficient mass of sample present to allow sustained ignition.
GLP compliance:
yes
Specific details on test material used for the study:
SOURCE OF TEST MATERIAL
- Lot/batch No.of test material: A0076
- Expiration date of the lot/batch: 2021

STABILITY AND STORAGE CONDITIONS OF TEST MATERIAL
- Storage condition of test material: Ambient (15±10°C), protected from light

TREATMENT OF TEST MATERIAL PRIOR TO TESTING
- Treatment of test material prior to testing: The test substance was tested as received
Key result
Relative self-ignition temperature:
206 °C
Remarks on result:
other: The temperature of self ignition was extrapolated from the temperature/time curve.

Table 1. Self-ignition results

 Time (min)  Kiln temperature (°C)  Sample temperature (°C)
 72.0  192.4  198.0
 74.0  194.9  200.1
 75.5  197.0  201.8
 77.0  198.3  202.9
 80.0  198.5  203.4
 83.5  198.3  204.5
 85.5  200.0  206.6
 87.0  202.4  209.2
 88.0  203.8  210.3
 89.5  205.4  212.1
 91.0  206.1  213.3
 92.0  206.3  214.3
 100.0  206.3  214.3
 130.0  193.4  375.9
 160.0  189.0  389.0
 220.0  179.5  400.5
Conclusions:
The self ignition temperature of the test item was determined to be 206°C.
Executive summary:

The self ignition temperature of the reaction mass of amines, hydrogenated tallow alkyl and azelaic acid and lithium hydroxide was determined according to EU A.16. A steel mesh cube (5 x 5 x 5 cm, #300 mesh / 0.045mm aperture) was filled with the test item and placed in an oven. The temperatures of the oven and sample were continuously recorded while the temperature of the oven was increased to the melting point of the substance at a rate of 0.5°C/min. The self ignition temperature of the test item was determined to be 206°C. This study is considered to be reliable without restrictions (Klimisch 1) as it was conducted according to a guideline method. Although the mesh cube was larger than recommended by guideline (50mm3 instead of 20mm3), it was required to keep sufficient mass of sample present to allow sustained ignition.

Description of key information

The self ignition temperature of the test item was determined to be 206°C.

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
206 °C

Additional information

The self ignition temperature of the reaction mass of amines, hydrogenated tallow alkyl and azelaic acid and lithium hydroxide was determined according to EU A.16. A steel mesh cube (5 x 5 x 5 cm, #300 mesh / 0.045mm aperture) was filled with the test item and placed in an oven. The temperatures of the oven and sample were continuously recorded while the temperature of the oven was increased to the melting point of the substance at a rate of 0.5°C/min. The self ignition temperature of the test item was determined to be 206°C. This study is considered to be reliable without restrictions (Klimisch 1) as it was conducted according to a guideline method. Although the mesh cube was larger than recommended by guideline (50mm3 instead of 20mm3), it was required to keep sufficient mass of sample present to allow sustained ignition.