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Physical & Chemical properties

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Reference
Endpoint:
relative self-ignition temperature (solids)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
Study starting date: 2017-09-25; Experimental starting date: 2017-11-28; Experimental completion date: 2017-11-29
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
other: UN Test N.4, Class 4, Division 4.2
GLP compliance:
yes (incl. QA statement)
Key result
Relative self-ignition temperature:
240 °C
Key result
Relative self-ignition temperature:
240 °C
Remarks on result:
other:
Remarks:
test item mixed with Kieselguhr

In the investigation of self-ignition in the Grewer-oven an endothermic process was observed for the pure test item and the test item in mixture with Kieselguhr in the temperature range of 100 to 155 C.

For the pure test item a self-ignition was observed at a temperature of 240 °C, which led to a maximum temperature of 555 °C.

In the investigation of self-ignition in the Grewer-oven for the test item in mixture with Kieselguhr a self-ignition was observed at a temperature of 240 °C, which led to a maximum temperature of 670 °C.

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

Experiment

Onset self
ignition / °C

Maximum temperature / °C

 

Pure test item

240

555

Test item in mixture
with Kieselguhr (1:1)

240

670
Conclusions:
In the investigation of self-ignition in the Grewer-oven for the pure test item and for the test item in mixture with Kieselguhra self-ignition could be oberserved at a temperature of 240 °C.
Executive summary:

In the investigation of self-ignition in the Grewer-oven for the pure test item and for the test item in mixture with Kieselguhra self-ignition could be oberserved at a temperature of 240 °C.

Based on the results of the test in the Grewer oven the test item is classified as follows:

UN Transport Regulation

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

GHS and EC 1272/2008 (CLP Regulation) Annex 1: 2.11:

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

Description of key information

In the investigation of self-ignition in the Grewer-oven for the pure test item and for the test item in mixture with Kieselguhra self-ignition could be oberserved at a temperature of 240 °C.

Based on the results of the test in the Grewer oven the test item is classified as follows:

UN Transport Regulation

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

GHS and EC 1272/2008 (CLP Regulation) Annex 1: 2.11:

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

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
240 °C

Additional information

This study was GLP compliant and followed UN Test N.4, Class 4, Division 4.2. The study was given a reliability rating of 1 (reliable without restrictions).