Reaction product of the mixture p-phenylenediamine and 4-(2-naphthalenylamino)phenol with sodium polysulfide

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Administrative data

Endpoint:

relative self-ignition temperature (solids)

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2017-10-25 - 2018-04-19

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2018

Report date:

2018

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

other: Recommendations on the TRANSPORT OF DANGEROUS GOODS: Manual of Tests and Criteria

Version / remarks:

Rev. 6, 2015

Deviations:

no

Test guideline 2

Qualifier:

according to guideline

Guideline:

other: VDI 2263, sheet 1, Grewer Oven

Version / remarks:

1990

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Test material

Test material information

Constituent 1

Reference substance name:

Reaction product of the mixture p-phenylenediamine and 4-​(2-​naphthalenylamino)​phenol with sodium polysulfide

EC Number:

947-876-9

Molecular formula:

not applicable

IUPAC Name:

Reaction product of the mixture p-phenylenediamine and 4-​(2-​naphthalenylamino)​phenol with sodium polysulfide

Test material form:

solid: particulate/powder

Details on test material:

Test item: Black DB
Appearance: black powder

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

Results and discussion

Relative self-ignition temperature (solids)

Key result

Remarks on result:

not measured/tested

Remarks:

see endpoint 4.13 self-heating substances

Any other information on results incl. tables

Self-ignition in the Grewer Oven

In the investigation of self-ignition in the Grewer Oven for the pure test item, showed a self-heating starting at a temperature of 130 °C that led to a maximum temperature of approx. 600 °C (corresponding oven temperature 265 °C). After the measurement a black residue remained in the basket.

For the test item in mixture with Kieselguhr a self-heating starting at a temperature of 130 °C was observed that led to a maximum temperature of approx. 620 °C (corresponding oven temperature 315 °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	130	600
Test item in mixture with Kieselguhr (1:1)	220	620

Applicant's summary and conclusion

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.

In the Grewer oven the pure test item Black DB indicated a self-heating starting at a temperature of 130 °C that led to a maximum temperature of approx. 600 °C (corresponding oven temperature 265 °C).

On the basis of the results of the screening test on the self-ignition in the Grewer Oven a classification of the test item as self-heating substance cannot be excluded. Further tests according to UN Test N.4 (Bowes-Cameron-Cage Test) have to be performed for the classification.

Executive summary:

Summary

The pure test item Black DB indicated a self-heating starting at a temperature of 130 °C that led to a maximum temperature of approx. 600 °C (corresponding oven temperature 265 °C).

On the basis of the results of the screening test on the self-ignition in the Grewer Oven a classification of the test item as self-heating substance cannot be excluded. Further tests according to UN Test N.4 (Bowes-Cameron-Cage Test) have to be performed for the classification.