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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:
11.11.2008 - 22.01.2009
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
equivalent or similar to
Guideline:
EU Method A.16 (Relative Self-Ignition Temperature for Solids)
Deviations:
no
Qualifier:
according to
Guideline:
other: Screening test - Grewen oven
Deviations:
no
GLP compliance:
no
Key result
Remarks on result:
no self ignition observed under the test conditions

The test item showed an endothermic effect in the temperature range of approx. 55 – 80 °C (melting) and no exothermal reaction of the test item was observed up to a maximum temperature of 435 °C

Conclusions:
The test item melted and no self-ignition temperature was observed up to 435 °C.
Executive summary:

A study was conducted to determine the relative self-ignition temperature of the test item using the Grewer Oven. The test is designed to determine the relative auto-ignition temperature of a product in a hot air-stream (100 - 120 L/h). 8 cm of the test item were placed in a cylindrical fine wire mesh container and in a Grewer oven at 24 °C; the temperature/time curve relating to conditions in the centre of the sample and the reference item (graphite powder) was recorded while the temperature of the oven was increased to 435 °C at a rate of 1.8 °C/min, while a hot air stream was blown through them. The test item showed an endothermic effect in the temperature range of approx. 55 – 80 °C (melting) and no exothermal reaction of the test item was observed up to a maximum temperature of 435 °C. Thus, no self-ignition temperature could be stated.

Description of key information

The test item melted and no self-ignition temperature was observed up to 435 °C.

Key value for chemical safety assessment

Additional information

A study was conducted to determine the relative self-ignition temperature of the test item using the Grewer Oven. The test is designed to determine the relative auto-ignition temperature of a product in a hot air-stream (100 - 120 L/h). 8 cm of the test item were placed in a cylindrical fine wire mesh container and in a Grewer oven at 24 °C; the temperature/time curve relating to conditions in the centre of the sample and the reference item (graphite powder) was recorded while the temperature of the oven was increased to 435 °C at a rate of 1.8 °C/min, while a hot air stream was blown through them. The test item showed an endothermic effect in the temperature range of approx. 55 – 80 °C (melting) and no exothermal reaction of the test item was observed up to a maximum temperature of 435 °C. Thus, no self-ignition temperature could be stated (reference 4.12-1).

 

Additionally, in accordance with column 2 of REACH Annex VII, the auto-flammability study does not need to be conducted as the substance is a solid with a melting point <160 °C (reference 4.12-2).