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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:
2017-03-16 to 2017-03-17
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reference:
Composition 0
Qualifier:
according to
Guideline:
other: UN Manual of Tests and Criteria:UN Division 4.2, Test N.4 and Appendix 6 (Grewer oven)
Version / remarks:
Rev. 6 (2015)
Deviations:
no
Qualifier:
according to
Guideline:
other: VDI 2263, Sheet 1, Grewer Oven
Version / remarks:
1990
Deviations:
no
GLP compliance:
yes (incl. certificate)
Remarks:
signed 2017-02-28
Test material information:
Composition 1
Key result
Relative self-ignition temperature:
320 °C

In the investigation of self-ignition in the Grewer Oven for the pure test item, an endothermic process was detected at approximately 130 °C, which can be assigned to the melting of the test item. An exothermic effect was observed at approximately 320 °C, which led to a maximum temperature of 550 °C. After the measurement the basket was empty.

For the test item in mixture with Kieselguhr an exothermic effect was observed at approximately 320 °C, which led to a maximum temperature of 560 °C.

Results of the screening test for self-ignition in the Grewer Oven

Experiment Onset self- ignition / °C Maximum temperature / °C
Pure test item 320 550
Test item in mixture with Kieselguhr (1:1) 320 560
Conclusions:
The pure test item indicated a self-ignition at atmospheric pressure at a temperature of approximately 320 °C. The test in accordance with VDI sheet 1 (Grewer-Oven) is a screening test only. However, test results indicate that no full test should be initiated and no classification and labelling is required for that substance as follows:

UN Transport Regulation:
The test item has not to be classified as self-heating substance in class 4, division 4.2 according to the UN Transport Regulation.

GHS / CLP Regulation EC 1272/2008 Annex 1: 2.11:
The test item has not to be classified as self-heating substance according to GHS/CLP Regulation EC 1272/2008 Annex 1: 2.11.

Description of key information

The test in accordance with VDI sheet 1 (Grewer-Oven) is a screening test only. However, test results indicate that no full test should be initiated and no classification and labelling is required for that substance.

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
320 °C

Additional information

The pure test item indicated a self-ignition at atmospheric pressure at a temperature of approximately 320 °C. The test in accordance with VDI sheet 1 (Grewer-Oven) is a screening test only. However, test results indicate that no full test should be initiated and no classification and labelling is required for that substance as follows:

UN Transport Regulation:

The test item has not to be classified as self-heating substance in class 4, division 4.2 according to the UN Transport Regulation.

GHS / CLP Regulation EC 1272/2008 Annex 1: 2.11:

The test item has not to be classified as self-heating substance according to GHS/CLP Regulation EC 1272/2008 Annex 1: 2.11.