Phenol, 4-(9H-carbazol-3-ylamino)-, reaction products with sodium sulfide (Na2(Sx)) and sulfur, leuco deriv.

Flammability

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

flammable solids

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2017-03-01 - 2017-05-18

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

UN Manual of Tests and Criteria: Test N.1 (Test method for readily combustible solids)

Version / remarks:

Revision 6 (2015)

Deviations:

no

Qualifier:

according to guideline

Guideline:

other: VDI 2263, sheet 1

Version / remarks:

1990

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Specific details on test material used for the study:

Test Item: Leuco Sulfur Blue 20
Appearance: Black powder
CAS No.: 85940-25-6
EC No.: 288-914-8

Key result

Test procedure:

burning rate test: preliminary screening test

Remarks on result:

substance does not ignite and propagate combustion either by burning with flame or smouldering along 200 mm of the powder train within the 2 minutes test period

Results

Preliminary Test

The test item did not ignite at room temperature using a flame as ignition source being applied for at least 2 minutes.

Main Test

In the preliminary test the test item could not be ignited by a flame. Thus, the performance of the main test was not necessary.

Interpretation of results:

GHS criteria not met

Conclusions:

Final Results:
The test item Leuco Sulfur Blue 20 could not be ignited applying a flame as ignition source for at least 2 minutes.

The test item is classified as follows:
UN Transport Regulation: The product has not to be classified as readily combustible solid in class 4.1 according to the UN Transport Regulation.
GHS (CLP Regulation EC 1272/2008: Annex 1: 2.7): The product has not to be classified as flammable solid according to GHS / CLP Regulation EC 1272/2008 Annex 1: 2.7.

Executive summary:

Summary

The test item Leuco Sulfur Blue 20 could not be ignited applying a flame as ignition source for at least 2 minutes.

The test item is classified as follows:
UN Transport Regulation: The product has not to be classified as readily combustible solid in class 4.1 according to the UN Transport Regulation.

GHS (CLP Regulation EC 1272/2008: Annex 1: 2.7): The product has not to be classified as flammable solid according to GHS / CLP Regulation EC 1272/2008 Annex 1: 2.7.

Reference 2

Endpoint:

self-heating substances / mixtures

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2017-03-01 - 2017-06-22

Reliability:

1 (reliable without restriction)

Qualifier:

according to guideline

Guideline:

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

Version / remarks:

Revision 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)

Key result

Test procedure:

100 mm sample cube at 140°C

Max. temp. reached:

150

Induction time (h):

11

Result:

negative outcome (no effect observed)

Remarks:

temperature increase of < 60 °C within 24 hours

Key result

Test procedure:

other: Onset temperature in the Grewer oven

Result:

negative outcome (no effect observed)

Remarks:

slight self-heating starting at a temperature of approx. 170 °C, which cannot be considered as a self-ignition of the test item.

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 40 – 90 °C, which may be caused by the drying of the test item. Starting at a temperature of approx. 170 °C the test item showed a slight self-heating, which did not led to a significant temperature increase in relation to the corresponding oven temperature. Due to this result the exothermic effect cannot be considered as a self-ignition of the test item. After the measurement a black residue remained in the basket.

For the test item in mixture with Kieselguhr an exothermic effect was detected, in the temperature range of 220 – 340 °C that led to a maximum temperature of approx. 710 °C (corresponding oven temperature 340 °C).

Table 1 summarizes the results of the Grewer Oven experiment.

Table1: Results of the screening test for self-ignition in the Grewer Oven

Experiment	Onset self- ignition / °C	Maximum temperature / °C	Remarks
Pure test item	---	---	Figure 4,Figure 5
Test item in mixture with Kieselguhr (1:1)	220	710

Bowes-Cameron-Cage Test (UN Test N.4) - 140 °C, 100 mm cube sample

The wire basket was only filled up to four fifths of the volume, due to a lack of test item. Nevertheless the filling level was considered as sufficient to verify the result of the Grewer oven test. The temperature in the centre of the sample exceeded the oven temperature by about 10 K within approximately 11 hours test time. Since the temperature increase is below threshold of 60 °C within 24 hours the result of the test is negative.

Interpretation of results:

GHS criteria not met

Conclusions:

Final Results / Classification:
In the Grewer oven the pure test item Leuco Sulfur Blue 20 indicated a slight self-heating at atmospheric pressure starting at a temperature of approx. 170 °C, which cannot be considered as a self-ignition of the test item.
In the Bowes-Cameron-Cage test with a 1 L wire basket at 140 °C the test showed a self-heating of the test item with a temperature increase of < 60 °C within 24 hours.

On the basis of the results of the tests on the self-ignition in the Grewer Oven test and the Bowes-Cameron-Cage test with a 1 L wire basket at 140 °C the item is classified as follows:
UN Transport Regulation: The test item has not to be classified as self-heating substance in class 4, division 4.2 according to the UN Transport Regulation.
GHS / CLP Regulation EC 1272/2008 Annex 1: 2.11: The test item has not to be classified as self-heating substance according to GHS/CLP Regulation EC 1272/2008 Annex 1: 2.11.

Executive summary:

Summary

In the Grewer oven the pure test item Leuco Sulfur Blue 20 indicated a slight self-heating at atmospheric pressure starting at a temperature of approx. 170 °C, which cannot be considered as a self-ignition of the test item.

In the Bowes-Cameron-Cagetest with a 1 L wire basket at 140 °C the test showed a self-heating of the test item with a temperature increase of < 60 °C within 24 hours.

According to the results of the tests on the self-ignition in the Bowes-Cameron-Cage Test (UN-Test N.4) the test item is classifiedas follows:

On the basis of the results of the tests on the self-ignition in the Grewer Oven test and the Bowes-Cameron-Cage test with a 1 L wire basket at 140 °C the item is classified as follows:

UN Transport Regulation: The test item has not to be classified as self-heating substance in class 4, division 4.2 according to the UN Transport Regulation.

GHS / CLP Regulation EC 1272/2008 Annex 1: 2.11: The test item has not to be classified as self-heating substance according to GHS/CLP Regulation EC 1272/2008 Annex 1: 2.11.

Description of key information

The test item Leuco Sulfur Blue 20 could not be ignited applying a flame as ignition source for at least 2 minutes.

The product has not to be classified as flammable solid according to GHS / CLP Regulation EC 1272/2008 Annex 1: 2.7

Key value for chemical safety assessment

Flammability:

not classified

Additional information

Flammable solids

A study was conducted according Test N.1 (Test method for readily combustible solids) of the UN Manual of Tests and Criteria to determine the flammability of the test substance. The test item could not be ignited with a flame in the preliminary test. Therefore the performance of the main test was not necessary

Then test item was not considered for classification as flammable solid.

Flammable gases

The test item is a solid at ambient conditions. This hazard class is only applicable for gases. Thus, the substance was not considered for classification as flammable gas.

 

Flammable liquid

The test item is a solid at ambient conditions. This hazard class is only applicable for liquids. Thus, the substance was not considered for classification as flammable liquid.

 

Pyrophoric solids

The study does not need to be conducted because the substance is known to be stable in contact with air at room temperature for prolonged periods of time (days). Thus, no study was conducted and the substance was not considered for classification as pyrophoric solids.

Pyrophoric liquids

The test item is a solid at ambient conditions. This hazard class is only applicable for liquids. Thus, the substance was not considered for classification as pyrophoric liquid.

 

Self-heating substances and mixtures

A study was conducted according to UN-Test N.4 (Bowes-Cameron-Cage Test). On the basis of this result the test item has not to be classified as self-heating substance.

 

Substances which, in contact with water, emit flammable gases

In accordance with column 2 of REACH Annex VI and with Regulation (EC) No 1272/2008 Annex I section 2.12.4 and ECHA guidance on the application of CLP Criteria section 2.12.4.2 the classification procedure for this hazard class need not to be applied. Based on the experience in handling and use the substance does not react with water and in addition the test substance is not pyrophoric. Thus, no study was conducted and the substance was not considered for classification.

Flammable Aerosols

Section 2.4.2 of Guidance on the application on the CLP Criteria state as follows:

“Aerosols, this means aerosol dispensers, are any non-refillable receptacles made of metal, glass or plastics and containing a gas compressed, liquefied or dissolved under pressure, with or without a liquid, paste or powder, and fitted with a release device allowing the contents to be ejected as solid or liquid particles in suspension in a gas, as a foam, paste or powder or in a liquid state or in a gaseous state." Thus, as the substance does not meet the definition for aerosol, the test for aerosols was waived. Consequently the substance has not to be considered for classification for this hazard class.

In conclusion the substance has not to be considered as flammable gas, flammable liquid, flammable solid, flammable in contact with water, flammable aerosol, pyrophoric solid, pyrophoric liquid or self-heating substance.

Justification for classification or non-classification

In accordance with Annex I Section 2.2, Section 2.3, Section 2.6, Section 2.7, Section 2.9, Section 2.10 Section 2.11, Section 2.12 of Regulation (EC) No 1272/2008 and UN GHS Rev 6 (2015) the test item has not to be classified as flammable liquid, readily combustible solid in class 4 Division 4.1, self-heating substance in Class 4 Division 4.2, substances which in contact with water emit flammable gases in Class 4 Division 4.3, pyrophoric liquid, pyrophoric solid in class 4 Division 4.2, flammable gases in class 2 or as aerosol in class 2.