Registration Dossier

Administrative data

Endpoint:
relative self-ignition temperature (solids)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2017-05-02 - 2017-09-15
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2017
Report Date:
2017

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to
Guideline:
other: Recommendations on the TRANSPORT OF DANGEROUS GOODS: Manual of Tests and Criteria
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)

Test material

Reference
Name:
Unnamed
Type:
Constituent
Test material form:
solid: particulate/powder
Details on test material:
Test Item: Leuco Sulfur Blue 15
Appearance: Dark, near black powder
Specific details on test material used for the study:
Reagents: Kieselguhr
Batch No.: TA2082010
Identity and content: Conforms
Certificate of analysis: Certificate of Analysis dated 2016-10-20; Merck KGaA, Frankfurter Straße 250, 64293 Darmstadt
Expiry date: 2021-10-31

Results and discussion

Relative self-ignition temperature (solids)
Key result
Remarks on result:
other: Grewer oven screening
Remarks:
Onset temperature is 240 °C, which is above the threshold of 220 °C for classification.

Any other information on results incl. tables

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 was detected in the temperature range of 110 – 130 °C, which may be caused by the drying of the test item. A first exothermic effect was observed in the temperature range of 240 – 300 °C that led to a maximum temperature of approx. 300 °C (corresponding oven temperature 280 °C). A second exothermic effect was detected in the temperature range of 320 – 420 °C that led to a maximum temperature of approx. 510 °C (corresponding oven temperature 420 °C). After the measurement the wire basket was empty.

For the test item in mixture with Kieselguhr also a small endothermic effect was detected in the temperature range of 110 – 130 °C, which may be caused by the drying of the test item. An exothermic effect was observed, in the temperature range of 230 – 400 °C that led to a maximum temperature of approx. 500 °C (corresponding oven temperature 320 °C).

Table 1summarizes the results of the Grewer Oven experiment.

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

Experiment

Onset self-
ignition / °C

Maximum temperature / °C

Remarks

Pure test item

240
320

300
510

Test item in mixture
with Kieselguhr (1:1)

230

500

Applicant's summary and conclusion

Conclusions:
Instead of the test on the relative self-ignition temperature according EC A.16. the test for self-heating substances according to Recommendations on the TRANSPORT OF DANGEROUS GOODS: Manual of Tests and Criteria: UN Test N.4 and the screening test in the Grewer oven according to VDI 2263, sheet 1 were performed, since these are now recommended for evaluation and classification.

In the Grewer oven the pure test item Leuco Sulfur Blue 15 indicated a first self-heating at atmospheric starting at a temperature of 240 °C that that led to a maximum temperature of approx. 300 °C (corresponding oven temperature 280 °C). A second exothermic effect was observed in the temperature range of 320 – 420 °C that led to a maximum temperature of approx. 510 °C (corresponding oven temperature 420 °C).

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 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.
Executive summary:

Summary

The pure test item Leuco Sulfur Blue 15 indicated a first self-heating at atmospheric starting at a temperature of 240 °C that that led to a maximum temperature of approx. 300 °C (corresponding oven temperature 280 °C). A second exothermic effect was observed in the temperature range of 320 – 420 °C that led to a maximum temperature of approx. 510 °C (corresponding oven temperature 420 °C).

On the basis of the results of the tests on the self-ignition in theGrewer Oven the test item is classified 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 RegulationEC 1272/2008 Annex 1: 2.11: The test item has not to be classified as self-heating substance according to GHS/CLP RegulationEC 1272/2008 Annex 1: 2.11.