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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

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Reference
Endpoint:
relative self-ignition temperature (solids)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2021-05-11 to 2021-09-17
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
other: UN Manual of Tests and Criteria, Rev. 7 (2019); UN Model Regulations, Rev. 21 (2019); VDI Guideline 2263, Part 1, Grewer Oven (1990)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Key result
Remarks on result:
no self ignition observed under the test conditions

For the pure test item a week endothermic effect was detected in the temperature range of approx. 240-260°C. No exothermic process was detected up to the test end temperature of ca. 410°C. A light brown residue remained in the wire basket after the test.

For the test item in mixture with Kieselguhr no exothermic process was detected up to the test end temperature of ca. 410°C.

Conclusions:
The test item indicated no self-ignition at atmospheric pressure up to the test end temperature of ca. 410°C. Therefore, the test item should not be classified as self-heating substance in Class 4, Division 4.2 according to the UN Transport Regulation. The test item should not be classified as self-heating substance according to GHS/CLP Regulation (EC) No 1272/2008 Annex I: 2.11.
Executive summary:

During the investigation of self-ignition in the Grewer Oven for the pure test item according to UN test N.4, a weak endothermic effect was detected in the temperature range of ca. 240-260°C. No exothermic process was detected up to the test end temperature of ca. 410°C. Thus, the pure test item indicated no self-ignition at atmospheric pressure up to the test end temperature of ca. 410°C. Melting of the test item was not observed.

Description of key information

The pure test item indicated no self-ignition at atmospheric pressure up to the test end temperature of ca. 410°C.

Key value for chemical safety assessment

Additional information