Trisodium bis[4-[4,5-dihydro-4-[(2-hydroxy-5-nitrophenyl)azo]-3-methyl-5-oxo-1H-pyrazol-1-yl]benzene-1-sulphonato(3-)]cobaltate(3-)

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 August 28th to 30th, 2019

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

other: Recommendations on the TRANSPORT OF DANGEROUS GOODS: Manual of Tests and Criteria: Appendix 6 Screening Procedures, Division 4.2: Substances which may be liable to spontaneous combustion

Version / remarks:

6th edition, New York and Geneva, 2015

GLP compliance:

yes (incl. QA statement)

Relative self-ignition temperature:

240 °C

Remarks on result:

preliminary test

Remarks:

pure test item

Relative self-ignition temperature:

260 °C

Remarks on result:

preliminary test

Remarks:

test item in mixture with Kieselguhr (1:1)

Self-ignition in the Grewer oven

In the investigation of self-ignition in the Grewer oven the pure test item showed first an endothermic effect starting at a temperature of approx. 80 °C. A self-ignition could be oberserved starting at a temperature of 240 °C and lead to a maximum temperature of 455 °C. After the measurement a black residual remained in the basket.

The test item in mixture with Kieselguhr showed a self-heating starting at 260 °C with a maximum temperature of 520 °C. After the measurement a grey powder remained in the basket.

Final results / classification

The pure test item indicated a self-ignition at atmospheric pressure starting at a temperature of 240 °C, which led to a maximum temperature of 455 °C. In mixture with Kieselguhr, the test item indicated a self-ignition at atmospheric pressure starting at a temperature of 260 °C, which led to a maximum temperature of 520 °C.

Classification:

UN Transport Regulation: test item is not classified as self-heating substance in class 4, division 4.2.

GHS / CLP Regulation EC 1272/2008 Annex 1: 2.11: test item is not classified as self-heating substance

Conclusions:

The pure test item indicated a self-ignition at atmospheric pressure starting at a temperature of 240 °C, which led to a maximum temperature of 455 °C. In mixture with Kieselguhr, the test item indicated a self-ignition at atmospheric pressure starting at a temperature of 260 °C, which led to a maximum temperature of 520 °C.

Executive summary:

The self-ignition behaviour of test item is determined in the Grewer oven and classification is decided according to UN Transport Regulation (Class 4, Division 4.2) and GHS as specified in EC 1272/2008 (CLP Regulation, Annex 1: 2.11), respectively.

The pure test item indicated a self-ignition at atmospheric pressure starting at a temperature of 240 °C, which led to a maximum temperature of 455 °C. In mixture with Kieselguhr, the test item indicated a self-ignition at atmospheric pressure starting at a temperature of 260 °C, which led to a maximum temperature of 520 °C.

Test item is not classified as self-heating substance in class 4, division 4.2 according to the UN Transport Regulation.

Test item is not classified as self-heating substance according to GHS/CLP Regulation (EC 1272/2008) Annex 1: 2.11, respectively.

Description of key information

Pure test item: self-ignition at 240 °C, leading to a maximum temperature of 455 °C.

Test item in mixture 1:1 with Kieselguhr: self-ignition at 260 °C, leading to a maximum temperature of 520 °C.

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:

240 °C

Additional information

Grewer oven test - UN division 4.2 test 4 and appendix 6.

Classification:

UN Transport Regulation: test item is not 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: test item is not classified as self-heating substance according to GHS/CLP Regulation (EC 1272/2008) Annex 1: 2.11, respectively.