reaction mass of sodium 1-amino-4-[[3,5-bis[[(chloroacetyl)amino]methyl]-2,4,6-trimethylphenyl]amino]-9,10-dihydro-9,10-dioxoanthracene-2-sulphonate and sodium 1-amino-4-[[3-[[(chloroacetyl)amino]methyl]-2,4,6-trimethylphenyl]amino]-9,10-dihydro-9,10-dioxoanthracene-2-sulphonate

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 22, 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 godds: 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

Deviations:

no

Qualifier:

according to guideline

Guideline:

other: VDI 2263, sheet 1

Deviations:

no

GLP compliance:

no

Relative self-ignition temperature:

190 °C

Remarks on result:

preliminary test

Remarks:

(onset temperature)

In the investigation of self-ignition in the Grewer Oven for the test item an exothermic process was detected starting at a temperature of approx. 190 °C that led to a maximum temperature of approx. 405 °C (corresponding oven temperature 290 °C). No further thermal effects could be observed up to the maximum test temperature of approx. 410 °C. After the measurement a grey to black residue remained in the wire basket.

For the test item in mixture with Kieselguhr an exothermic process was detected starting at a temperature of approx. 190 °C that led to a maximum temperature of approx. 520 °C (corresponding oven temperature 265 °C). A further exothermic process was detected starting at a temperature of approx. 320 °C that led to a maximum temperature of approx. 430 °C (corresponding oven temperature 410 °C).

Experiment	Onset self-heating / °C	Maximum temperature / °C
Test item	190	405
Test item in mixture with Kieselguhr (1:1)	190	520
	320	430

Conclusions:

Self-heating starting from 190 °C

Executive summary:

The self-ignition behavior of the test item was determined by Grewer test method in the oven according to VDI 2263, sheet 1. The test item was filled in a small wire basket of a volume of 8 cm³ and this wire-basket was placed into the oven. In this oven, the self-ignition behavior of five samples can be determined simultaneously. 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 and the temperature of the sample was recorded as a function of time at intervals of 10 seconds. The self-ignition behavior of the pure test item was indicated as a deviation between sample temperature and reference temperature.

In addition, the self-ignition behavior of the sample blended with 50 wt.-% Kieselguhr was investigated in a third wire basket simultaneously.

The test item indicated a self-heating at atmospheric pressure starting at a temperature of 190 °C; this self-heating process led to a maximum temperature of approx. 405 °C (corresponding oven temperature 290 °C).

On the basis of the results of the tests on the self-ignition in the Grewer Oven a classification of the test item as self-heating substance cannot be excluded.

Conclusion

Self-heating starting from 190 °C

Description of key information

Self-heating starting from 190 °C

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:

190 °C

Additional information

VDI 2263 - Grewer test method