Registration Dossier
Registration Dossier
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EC number: 235-002-2 | CAS number: 12053-27-9
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Administrative data
Link to relevant study record(s)
- Endpoint:
- relative self-ignition temperature (solids)
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2017-09-20 to 2017-09-21
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Reason / purpose for cross-reference:
- reference to same study
- Qualifier:
- according to guideline
- 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
- Guideline:
- other: VDI 2263, Sheet 1, Grewer Oven
- Version / remarks:
- 1990
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Remarks:
- signed 2017-02-28
- Key result
- Remarks on result:
- no self ignition observed under the test conditions
- Conclusions:
- The pure test item dDichromium nitride indicated no self-ignition in the Grewer oven test. Oonly a self-heating, which started at 260 °C at atmospheric pressure up to the maximum test temperature of 410 °C was observed. Due to the high onset temperature, >220 °C in the Grewer Oven, it can be assumed that the UN Test N.4 using the 25 mm cube sample at 140 °C is negative.
On the basis of the results of the tests on the self-ignition in the Grewer Oven the test item is classified as follows:
UN Transport Regulation: The test item does not meet the classification criteria 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 does not meet the classification criteria has not to be classified as self-heating substance according to GHS/CLP Regulation EC 1272/2008 Annex 1, Section 2.11.
Reference
Self-ignition in the Grewer Oven
The investigation of self-ignition in the Grewer Oven for the pure test item shows no self-ignition. Only a self-heating, which started at 260 °C and lead to the maximum temperature of 430 °C (reference temperature 410 °C) was observde. After the measurement the test item in the basket remained unchanged.
The test item in mixture with Kieselguhr shows no self-ignition. Only a self-heating starting at 260 °C was observed and lead to the maximum temperature of 425 °C (reference temperature 410 °C).
Results of the screening test for self-ignition in the Grewer Oven
| Experiment | Start of effects [°C] | Maximum temperature [°C] |
| Pure test item | 260 | 430 |
| Test item in mixture with Kieselguhr (1:1) | 260 | 425 |
Final Results / Classification
The pure test item dichromium nitride indicated no self-ignition in the Grewer oven test. Only a self-heating, which started at 260 °C at atmospheric pressure up to the maximum test temperature of 410 °C was observed. Due to the high onset temperature, >220 °C in the Grewer Oven, it can be assumed that theUN Test N.4 using the 25 mm cube sample at 140 °C is negative.
On the basis of the results of the tests on theself-ignition in theGrewer Oven the test item is classified as follows:
UN Transport Regulation:The test item does not meet the classification criteria 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 does not meet the classification criteria as self-heating substance according to GHS/CLP RegulationEC 1272/2008 Annex 1, Section 2.11.
Description of key information
The test item dichromium nitride has no self-ignition temperature.
Key value for chemical safety assessment
Additional information
Summary:
The pure test item dichromium nitride indicated no self-ignition in the Grewer oven test. Only a self-heating, which started at 260 °C at atmospheric pressure up to the maximum test temperature of 410 °C was observed. Due to the high onset temperature, >220 °C in the Grewer Oven, it can be assumed that the UN Test N.4 using the 25 mm cube sample at 140 °C is negative.
On the basis of the results of the tests on the self-ignition in the Grewer Oven the test item is classified as follows:
UN Transport Regulation:The test item does not meet the classification criteria 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 does not meet the classification criteria as self-heating substance according to GHS/CLP RegulationEC 1272/2008 Annex 1, Section 2.11.
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