Acetamide, N-(2,4-dinitrophenyl)-, reaction products with p-phenylenediamine, sodium sulfide (Na2(Sx)) and sulfur, leuco deriv.

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:

2017-07-13 - 2018-03-06

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, 6th edition, New York and Geneva, 2015: Appendix 6 Screening Procedures, Division 4.2: Substances which may be liable to spontaneous combustion

Version / remarks:

Rev. 6 (2015)

Deviations:

no

Qualifier:

according to guideline

Guideline:

other: VDI 2263, sheet 1, Grewer Oven

Version / remarks:

1990

Deviations:

no

GLP compliance:

yes (incl. QA statement)

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

Key result

Remarks on result:

not measured/tested

Remarks:

see Endpoint 4.13 Self-Heating Substances

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 20 – 80 °C, which may be caused by the drying of the test item. At a temperature of 120 °C the self-ignition of the test item could be observed, which lead to a maximum temperature of 480 °C and a corresponding oven temperature of 310 °C. After the measurement the wire basket was empty.

For the test item in mixture with Kieselguhr a weak endothermic effect could be oberserved in the temperature range of 40 – 50 °C, which may be caused by the drying of the test item.. A self-ignition of the test item could be observed starting at a temperature of 130 °C, which lead to a maximum temperature of 415 °C and a corresponding oven temperature of 295 °C.

Table 1 summarizes 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	120	480
Test item in mixture with Kieselguhr (1:1)	130	415

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.

The pure test item Olive BW indicated a self-ignition starting at a temperature of 120 °C at atmospheric pressure.

Due to the self-ignition in the Grewer oven starting at 120 °C, a classification according to UN Transport Regulation or CLP Regulation EC 1272/2008 Annex 1: 2.11, respectively, cannot be excluded. To exclude self-heating properties, further studies according to UN N.4 are necessary.

Executive summary:

Summary

The pure test item Olive BW indicated a self-ignition starting at a temperature of 120 °C at atmospheric pressure.

Due to the self-ignitionin the Grewer oven starting at 120 °C, a classification according to UN Transport Regulation or CLP RegulationEC 1272/2008 Annex 1: 2.11, respectively, cannot be excluded. To exclude self-heating properties, further studies according to UN N.4 are necessary.

Description of key information

The pure test item Olive BW indicated a self-ignition starting at a temperature of 120 °C at atmospheric pressure. Due to the self-ignition in the Grewer oven starting at 120 °C, self-heating classification cannot be excluded. Further studies according to UN N.4 are necessary.

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:

120 °C