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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:
other: UN Manual of Tests and Criteria, 7th rev. edition, New York and Geneva, 2019: Part III, Section 33, Test N.4 Test method for self-heating substances (UN) and Appendix 6 Screening Procedures, A6.5.3.2 (a) Grewer Oven test
Qualifier:
according to guideline
Guideline:
other: VDI guideline 2263, Part 1, 1990: Test Methods for the Determination of the Safety Characteristic of Dusts, 1.4.1 Test according to Grewer
Qualifier:
according to guideline
Guideline:
other: UN Recommendations on the TRANSPORT OF DANGEROUS GOODS, Model Regulations, Vol. I, 21st rev. edition, New York and Geneva, 2019: Class 4, Division 4.2 – Substances liable to spontaneous combustion
GLP compliance:
yes (incl. QA statement)
Specific details on test material used for the study:
Batch C000363565
Key result
Relative self-ignition temperature:
> 410 °C
Remarks on result:
preliminary test
Conclusions:
The pure test item Ti3O5/Al2O3 Granulat 0.7-5mm indicated no self-ignition at atmospheric pressure up to a temperature of approx. 410 °C in a Screening test in the Grewer Oven. Due to this Screening test in the Grewer Oven, it can be assumed that the UN Test N.4 at 140 °C is negative.

On the basis to the results of the test on the self-ignition in the Grewer Oven the test item is classified as follows:
UN Transport Regulation: The test item does not have to be classified as self-heating substance in Class 4, Division 4.2 according to the UN Transport Regulation.
GHS / CLP Regulation (EC) No 1272/2008 Annex I: 2.11: The test item does not have to be classified as self-heating substance according to GHS/CLP Regulation (EC) No 1272/2008 Annex I: 2.11.
Executive summary:

The pure test item Ti3O5/Al2O3 Granulat 0.7-5mm indicated no self-ignition at atmospheric pressure up to a temperature of approx. 410 °C in a Screening test in the Grewer Oven. Due to this Screening test in the Grewer Oven, it can be assumed that the UN Test N.4 at 140 °C is negative.

On the basis to the results of the test on the self-ignition in the Grewer Oven the test item is classified as follows:

UN Transport Regulation: The test item does not have to be classified as self-heating substance in Class 4, Division 4.2 according to the UN Transport Regulation.

GHS / CLP Regulation (EC) No 1272/2008 Annex I: 2.11: The test item does not have to be classified as self-heating substance according to GHS/CLP Regulation (EC) No 1272/2008 Annex I: 2.11.

Description of key information

The pure test item Ti3O5/Al2O3 Granulat 0.7-5mm indicated no self-ignition at atmospheric pressure up to a temperature of approx. 410 °C in a Screening test in the Grewer Oven. Due to this Screening test in the Grewer Oven, it can be assumed that the UN Test N.4 at 140 °C is negative.

Key value for chemical safety assessment

Additional information