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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
Reason / purpose:
reference to same study
Qualifier:
equivalent or similar to
Guideline:
EU Method A.16 (Relative Self-Ignition Temperature for Solids)
Qualifier:
according to
Guideline:
other: VDI 2263 (1990), sheet 1, Grewer Oven
Deviations:
no
GLP compliance:
yes (incl. certificate)
Key result
Remarks on result:
other: No self-ignition up to 400 °C

Self-ignition in the Grewer Oven

In the investigation of self-ignition in the Grewer Oven for the pure test item a small endothermic effect could be observed at a temperature of approx. 220 °C, directly followed by an exothermic process starting at approx. 250 °C, which led to a maximum temperature of approx. 300 °C (30 °C above the corresponding temperature of the reference material). A second exothermic effect was observed from above 330 °C, which led to a maximum temperature of approx. 460 °C (60 °C above the corresponding temperature of the reference material). A black swelled residue remained in the wire basket after the test.

Table 1: Results of the screening test for self-ignition in the Grewer-Oven

Experiment

Onset self-ignition / °C

Maximum temperature / °C

Pure test item

Approx. 250

300

Approx. 330

460

Conclusions:
No self-ignition could be observed up to the maximum oven temperature of 400 °C.
Executive summary:

A study was conducted equivalent to Regulation (EC) No 440/2008 Part A, A.16 and according to VDI 2263, sheet 1.The self-ignition behavior of the test item was determined in the oven according to VDI 2263, sheet 1. For this purpose, the test item was filled in a small wire basket of a volume of 8 cm³ and this wire-basket was placed into the oven. In this oven, the self-ignition behavior of five samples can be determined simultaneously. An additional basket was filled with a reference material (graphite).
In the investigation of self-ignition in the Grewer Oven for the pure test item a small endothermic effect could be observed at a temperature of approx. 220 °C, directly followed by an exothermic process starting at approx. 250 °C, which led to a maximum temperature of approx. 300 °C (30 °C above the corresponding temperature of the reference material). A second exothermic effect was observed from above 330 °C, which led to a maximum temperature of approx. 460 °C (60 °C above the corresponding temperature of the reference material). A black swelled residue remained in the wire basket after the test. No self-ignition could be observed up to the maximum oven temperature of 400 °C. As the test conditions are quite similar to the method A.16, it was concluded that the results are transferable and no other result would be obtained by a study in accordance with Regulation (EC) No 440/2008 Part A, A.16.


Description of key information

No self-ignition could be observed up to the maximum oven temperature of 400 °C.

Key value for chemical safety assessment

Additional information

A study was conducted equivalent to Regulation (EC) No 440/2008 Part A, A.16 and according to VDI 2263, sheet 1.The self-ignition behavior of the test item was determined in the oven according to VDI 2263, sheet 1. For this purpose, the test item was filled in a small wire basket of a volume of 8 cm³ and this wire-basket was placed into the oven. In this oven, the self-ignition behavior of five samples can be determined simultaneously. An additional basket was filled with a reference material (graphite).
In the investigation of self-ignition in the Grewer Oven for the pure test item a small endothermic effect could be observed at a temperature of approx. 220 °C, directly followed by an exothermic process starting at approx. 250 °C, which led to a maximum temperature of approx. 300 °C (30 °C above the corresponding temperature of the reference material). A second exothermic effect was observed from above 330 °C, which led to a maximum temperature of approx. 460 °C (60 °C above the corresponding temperature of the reference material). A black swelled residue remained in the wire basket after the test. No self-ignition could be observed up to the maximum oven temperature of 400 °C. As the test conditions are quite similar to the method A.16, it was concluded that the results are transferable and no other result would be obtained by a study in accordance with Regulation (EC) No 440/2008 Part A, A.16.