Phenol, 4-amino-, reaction products with 4-(2-naphthalenylamino)phenol and sodium sulfide (Na2(Sx))

Flammability

Administrative data

Endpoint:

self-heating substances / mixtures

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2017-10-25 - 2018-04-23

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:

UN Manual of Tests and Criteria: Test N.4 (Test method for self-heating substances)

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:

Phenol, 4-amino-, reaction products with 4-(2-naphthalenylamino)phenol and sodium sulfide (Na2(Sx))

EC Number:

291-833-0

EC Name:

Phenol, 4-amino-, reaction products with 4-(2-naphthalenylamino)phenol and sodium sulfide (Na2(Sx))

Cas Number:

90480-94-7

Molecular formula:

not applicable

IUPAC Name:

Reaction product of 4-aminophenol with 4-​(2-​naphthalenylamino)​phenol and sodium polysulfide

Test material form:

solid

Details on test material:

Test item: Leuco Sulphur Black 11
Appearance: black solid
CAS No: 90480-94-7
EC No: 291-833-0

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

Self-heating substances / mixtures

Key result

Test procedure:

other: Onset temperature in the Grewer oven

Max. temp. reached:

500

Result:

positive outcome (effect observed)

Remarks on result:

other:

Remarks:

The pure test item showed a self-heating starting at a temperature of 170 °C

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 170 °C that led to a maximum temperature of approx. 500 °C (corresponding oven temperature 290 °C). A second exothermic effect was observed starting at a temperature of approx. 340 °C that led to a maximum temperature of approx. 500 °C (corresponding oven temperature 400 °C). After the measurement a grey residue remained in the basket.

For the test item in mixture with Kieselguhr a self-heating starting at a temperature of 170 °C was observed that led to a maximum temperature of approx. 650 °C (corresponding oven temperature 350 °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	170 340	500 500
Test item in mixture with Kieselguhr (1:1)	170	650

Applicant's summary and conclusion

Interpretation of results:

study cannot be used for classification

Conclusions:

The pure test item Leuco Sulphur Black 11 indicated a self-heating starting at a temperature of 170 °C that led to a maximum temperature of approx. 500 °C (corresponding oven temperature 290 °C). A second exothermic effect was observed starting at a temperature of approx. 340 °C that led to a maximum temperature of approx. 500 °C (corresponding oven temperature 400 °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 Leuco Sulphur Black 11 indicated a self-heating starting at a temperature of 170 °C that led to a maximum temperature of approx. 500 °C (corresponding oven temperature 290 °C). A second exothermic effect was observed starting at a temperature of approx. 340 °C that led to a maximum temperature of approx. 500 °C (corresponding oven temperature 400 °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.