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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Diss Factsheets

Administrative data

relative self-ignition temperature (solids)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2013-07-11 - 2013-07-12
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference Type:
study report
Report date:

Materials and methods

Test guideline
according to guideline
other: UN Recommendation on the TRANSPORT OF DANGEROUS GOODS: Manual of Tests and Criteria, Rev. 6 (2015) and UN-Model_Regulations, Rev. 19 (2015), \/Dl 2263 Sheet 1, Grewer-Oven (1990)
GLP compliance:
yes (incl. QA statement)

Test material

Constituent 1
Chemical structure
Reference substance name:
EC Number:
Cas Number:
Molecular formula:
Test material form:
solid: particulate/powder

Results and discussion

Relative self-ignition temperature (solids)open allclose all
Relative self-ignition temperature:
260 °C
Remarks on result:
no self ignition observed under the test conditions
Key result
Relative self-ignition temperature:
> 160 °C
Remarks on result:
no self-ignition observed up to the melting point

Any other information on results incl. tables

Before the performance of the Grewer-oven test, the test item was dried for 72 h in the vacuum drying oven at 60 °C (residual moisture: 8.2 wt. %). The dried test item was stored in the desiccator until the peformance of the test. 

The test item shows no exothermic effect up to 260 °C.

The temperature of the test item showed an endothermic effect in the temperature range 210 - 260 °C. Up to 260 °C no exothermic effect was observed. Above 260 °C the temperature in the test item wire-basket is slightly above the temperature of the reference item. The test item melts at 215.1 °C and therefore it is assumed that there is no test item in the wire-basket at temperatures above 260 °C. After the test the wire basket was empty. The measured temperature differences may be ascribed to uncertainities of the measurement. However, for an exclusion of the test item from class 4.2 "self-heating substances" the onset temperature in the Grewer-oven hast to be over 220 °C. 

Applicant's summary and conclusion

The test item shows no exothermic effect up to 260 °C.
UN transport classification: Due to these results the test item has not to be classified as "self-heating substance" of class 4.2 according to the transport regulations. EU-GHS-CLP: Due to these results the test item has not to be classified as "self-heating substance" according to EU-GHS/CLP.