Sodium 1-amino-9,10-dihydro-9,10-dioxo-4-[(2,2,4-trimethylcyclohexyl)amino]anthracene-2-sulphonate

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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:

February from 19th to 20th, 2018

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

test procedure in accordance with generally accepted scientific standards and described in sufficient detail

Qualifier:

according to guideline

Guideline:

other: Recommendations on the Transport of dangerous goods: Manual of Tests and Criteria, 6th edition, New York and Geneva, 2015: Appendix 6 Screening Procedures, Division 4.2: Substances which may be liable to spontaneous combustion

Qualifier:

according to guideline

Guideline:

other: VDI 2263 Sheet 1 Grewer Oven

Version / remarks:

1990

GLP compliance:

yes (incl. QA statement)

Remarks on result:

preliminary test

Remarks:

not to be classified as self-heating substance

In the investigation of self-ignition in the Grewer Oven for the pure test item, an endothermic effect was detected in the temperature range of 50 – 160 °C, which may be caused by the drying of the test item (3.2 % water). Starting at a temperature of approx. 210 °C the test item showed an exothermic effect, which leaded to a maximum temperature of 230 °C (reference temperature 225 °C). A second exothermic effect was observed at a temperature of 230 °C, which leaded to a maximum temperature of 245 °C (reference temperature 240 °C). No further exothermic effects were observed until the maximum test temperature of 410 °C. After the measurement a black residue remained in the basket.

For the test item in mixture with Kieselguhr no exothermic effects were detected.

Experiment	Onset self-heating / °C	Maximum temperature / °C
Pure test item	210	230
	230	245
Test item in mixturewith Kieselguhr (1:1)	--	--

Conclusions:

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

Executive summary:

The self-ignition behavior of the product was determined in the Grewer Oven according to VDI 2263, sheet 1 and with respect to the classification procedures of both the UN Transport Regulation (Class 4, Division 4.2). The test equipment consisted of an oven with six wire baskets with a volume of 8 cm³, a temperature controller and a temperature recorder. The wire baskets including the test item and the reference material (graphite) were heated at a rate of 1.2 K/min at atmospheric pressure in an air stream of 100 to 120 l per hour. The surrounding temperature at which the temperature of the test item begins to exceed the temperature of the reference material was considered as onset temperature of the self-ignition.

The pure test item showed a negligible self-heating at atmospheric pressure starting at a temperature of approx. 210 and 230 °C, which leaded to a maximum temperature of 230 and 245 °C, respectively.

Conclusion

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

Description of key information

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

Additional information

VDI 2263 - Grewer test