2-Naphthalenesulfonic acid, 5(or 8)-amino-, reaction products with 4-aminophenol and sodium sulfide (Na2(Sx))

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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 guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

other: Recommendations on the TRANSPORT OF DANGEROUS GOODS: Manual of Tests and Criteria

Version / remarks:

Rev. 6, 2015

Deviations:

no

Test guideline 2

Qualifier:

according to guideline

Guideline:

other: VDI 2263, sheet 1, Grewer Oven

Version / remarks:

1990

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Test material

Test material information

Constituent 1

Reference substance name:

2-Naphthalenesulfonic acid, 5(or 8)-amino-, reaction products with 4-aminophenol and sodium sulfide (Na2(Sx))

EC Number:

309-304-0

EC Name:

2-Naphthalenesulfonic acid, 5(or 8)-amino-, reaction products with 4-aminophenol and sodium sulfide (Na2(Sx))

Cas Number:

100208-97-7

Molecular formula:

not applicable

IUPAC Name:

2-Naphthalenesulfonic acid, 5(or 8)-amino-, reaction products with 4-aminophenol and sodium sulfide (Na2(Sx))

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.