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Physical & Chemical properties

Auto flammability

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Reference
Endpoint:
relative self-ignition temperature (solids)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
27 APR 2021
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:
no
GLP compliance:
no
Relative self-ignition temperature:
281.2 °C

FINDINGS

Weight of cube

empty: 5.0347 g

with test item: 8.8045 g

Temperature Data

The temperatures which were measured in the experiment are presented in the following table. As many values were recorded, only the values every 60 minutes are presented.

 Time [min.]  Temperature of test item [°C] Temperature of oven [°C]
 5 (Start)  22.8  21.4
 60  38.0  52.0
 120  63.5  88.7
 180  104.8  124.3
 240  140.7  159.2
 300  183.7  194.3
 360  251.0  238.4
 420  267.3  262.8
 480  400.0  281.2

After the test, the test item was darker and clumped together.

A sharp increase in the temperature of the test substance in comparison to that of the oven could be detected; also signs of ignition could be observed.

The test item is considered as auto-flammable with a relative self-ignition temperature of 281.2 °C under the test conditions.

Conclusions:
A sharp increase in the temperature of the test substance in comparison to that of the oven could be detected; also signs of ignition could be observed.
The test item is considered as auto-flammable with a relative self-ignition temperature of 281.2 °C under the test conditions.
Executive summary:

The self-ignition temperature of the test item was assessed in a non-GLP study according to EU Method A.16. A sharp increase in the temperature of the test substance in comparison to that of the oven could be detected; also signs of ignition could be observed. The test item is considered as auto-flammable with a relative self-ignition temperature of 281.2 °C under the test conditions.

Description of key information

The self-ignition temperature of the test item was assessed in a non-GLP study according to EU Method A.16. A sharp increase in the temperature of the test substance in comparison to that of the oven could be detected; also signs of ignition could be observed. The test item is considered as auto-flammable with a relative self-ignition temperature of 281.2 °C under the test conditions.

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
281.2 °C

Additional information

No pressure indicated in the study, but room conditions were available. A slight difference from the standard pressure (1013.25 hPa) does not affect the result of the study.