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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

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Physical & Chemical properties

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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:
no
GLP compliance:
yes (incl. QA statement)
Key result
Remarks on result:
other: No relative self-ignition of the test substance was observed below 400°C.

Prior to heating, the test sample was a yellow free-flowing powder. No exotherm of sufficient magnitude to constitute a self-ignition temperature is visible. After heating, a black free-flowing powder of approximately the same volume remained.

No relative self-ignition of the test substance was observed below 400°C.

Conclusions:
No relative self-ignition of the test substance was observed below 400°C.
Executive summary:

The objective of the study was to determine the self-ignition temperature of the test substance according to EU method A.16.

The apparatus consists of a temperature-programmed laboratory oven with natural air circulation and explosion relief. A 20 mm cube, made from stainless steel wire mesh with 0.045 mm openings, and secured with fold back clips, was filled with test substance. This was suspended in the oven and a thermocouple inserted into the test substance. A second thermocouple was mounted in the oven between the cube and the wall. A two-channel, direct temperature-reading chart recorder was used to monitor the temperature of the two thermocouples. The oven was set to perform a ramp rate of 0.5°C/min up to 400°C. The temperatures of the oven and the sample were recorded using the chart recorder. If a substance ignites, the sample trace will show a sharp temperature rise above the oven temperature. The chart recorder was programmed to automatically read the temperature of the oven when the sample temperature reaches 400°C. The sample was viewed before and after the test and any observations noted. No relative self-ignition of the test substance was observed below 400°C.

Description of key information

Key study: EC method A.16. GLP study.

No relative self-ignition of the test substance was observed below 400°C.

Key value for chemical safety assessment

Additional information

Key study: EC method A.16. GLP study.

No relative self-ignition of the test substance was observed below 400°C.