Bile, extract

Auto flammability

Link to relevant study record(s)

Reference

Endpoint:

relative self-ignition temperature (solids)

Type of information:

experimental study

Adequacy of study:

key study

Study period:

from 2018-05-23 to 2018-11-13

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: VDI 2263, part 1 1990, test methods for the determination of the safety characteristics of dusts; UN Transport Regulations, Appendix 6, Screening Procedures (Substances which may be liable to spontaneous combustion (Division 4.2))

Deviations:

no

Qualifier:

equivalent or similar to guideline

Guideline:

EU Method A.16 (Relative Self-Ignition Temperature for Solids)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Key result

Remarks on result:

no self ignition observed under the test conditions

In the investigation of self-ignition in the Grewer Oven for the pure test item a first small endothermic process was detected starting at approx. 60 °C and a second, starting at approx. 200 °C. After the test, only half of the test item volume was present in the wire basket. The residue in the wire basket was black. No self-heating or self-ignition could be observed up to 400 °C.

Conclusions:

No self-heating or self-ignition could be observed up to 400 °C.

Executive summary:

A study was conducted according to VDI 2263, part 1 1990, test methods for the determination of the safety characteristics of dusts; UN Transport Regulations, Appendix 6, Screening Procedures (Substances which may be liable to spontaneous combustion (Division 4.2)) to determine the self-heating properties of the test item. 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 behaviour of five samples can be determined simultaneously. An additional basket was filled with a reference material (graphite). The temperature of the oven was increased with a constant heating rate (1.2 K/min) in an air stream of 100 to 120 L per hour and the temperature of the sample was recorded as a function of time at intervals of 10 seconds. In the investigation of self-ignition in the Grewer Oven for the pure test item a first small endothermic process was detected starting at approx. 60 °C and a second, starting at approx. 200 °C. After the test, only half of the test item volume was present in the wire basket. The residue in the wire basket was black. No self-heating or self-ignition could be observed up to 400 °C. In accordance with REACH Annex VII this test result exclude self-heating of the test item up to 400 °C and thus the test according to EU method A.16 was not conducted.

Description of key information

No self-heating or self-ignition could be observed up to 400 °C and the auto-ignition temperature was determined to be above 400 °C.

Additional information

A study was conducted according to VDI 2263, part 1 1990, test methods for the determination of the safety characteristics of dusts; UN Transport Regulations, Appendix 6, Screening Procedures (Substances which may be liable to spontaneous combustion (Division 4.2)) to determine the self-heating properties of the test item. 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 behaviour of five samples can be determined simultaneously. An additional basket was filled with a reference material (graphite). The temperature of the oven was increased with a constant heating rate (1.2 K/min) in an air stream of 100 to 120 L per hour and the temperature of the sample was recorded as a function of time at intervals of 10 seconds. In the investigation of self-ignition in the Grewer Oven for the pure test item a first small endothermic process was detected starting at approx. 60 °C and a second, starting at approx. 200 °C. No self-heating or self-ignition could be observed up to 400 °C. In accordance with REACH Annex VII this test result exclude self-heating of the test item up to 400 °C and thus the test according to EU method A.16 was not conducted.