Disodium 3-[[4-amino-9,10-dihydro-9,10-dioxo-3-[sulphonato-4-(1,1,3,3-tetramethylbutyl)phenoxy]-1-anthryl]amino]-2,4,6-trimethylbenzenesulphonate

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:

February 27, 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: VDI 2263, sheet 1, Grewer Oven

Version / remarks:

1990

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:

no

Remarks on result:

no self ignition observed under the test conditions

The pure test item showed an exothermic effect starting at a temperature of 235 °C, which led to a maximum temperature of approx. 290 °C (corresponding temperature of the reference material 260 °C). After this, the temperature of the test item was permanent over the temperature of the reference material and led to a maximum temperature of approx. 490 °C (corresponding oven temperature 405 °C). After the test a black residue was left inside the wire basket.

For the test item in mixture with Kieselguhr an multistage exothermic process was detected starting at a temperature of approx. 240 °C, which led to a maximum temperature of approx. 470 °C (corresponding temperature of the reference material 370 °C).

Experiment	Onset self-ignition / °C	Maximum temperature / °C	Corresponding reference temperature / °C
Pure test item	235	290 (1^stPeak)	260 (1^stPeak)
		490 (2^ndPeak)	405 (2^ndPeak)
Test item in mixture with Kliselguhr (1:1)	240	290 (1^stPeak)	270 (1^stPeak)
		430 (2^ndPeak)	300 (2^ndPeak)
		470 (3^rdPeak)	370 (3^rdPeak)

The pure test item indicated a self-heating at atmospheric pressure starting at a temperature of 235 °C, which led to a maximum temperature of 290 °C. Then, the temperature of the test item was permanent over the temperature of the reference material and led to a maximum temperature of approx. 490 °C (corresponding oven temperature 405 °C).

Conclusions:

Not classified as self-heating substance

Executive summary:

The self-ignition behavior of the test item was determined in the oven according to VDI 2263, sheet 1. For this purpose, the test item was filled in a small wire basket and was placed into the oven; 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. Since very often, the test item melts before a self-ignition takes place, the self-ignition behavior of the sample blended with 50 wt.-% Kieselguhr was investigated in a third wire basket simultaneously. Kieselguhr has a high specific surface area and prevents the test item from flowing out of the baskets.

The pure test item indicated a self-heating at atmospheric pressure starting at a temperature of 235 °C, which led to a maximum temperature of 290 °C. Then, the temperature of the test item was permanent over the temperature of the reference material and led to a maximum temperature of approx. 490 °C (corresponding oven temperature 405 °C).

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

Conclusion

Not classified as self-heating substance

Description of key information

Not classified as self-heating substance

Additional information

VDI 2263 - Grewer Oven screening test