Naphthalenesulfonic acid, bis(1-methylethyl)-, Me derivs., sodium salts

Flammability

Administrative data

Endpoint:

flammable solids

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2017-01-03 - 2017-06-30

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2017

Report date:

2017

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:

Revision 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:

Naphthalenesulfonic acid, bis(1-methylethyl)-, Me derivs., sodium salts

EC Number:

272-715-8

EC Name:

Naphthalenesulfonic acid, bis(1-methylethyl)-, Me derivs., sodium salts

Cas Number:

68909-82-0

Molecular formula:

UVCB substance

IUPAC Name:

tetrasodium 2,4,5,7-tetramethylnaphthalene-1-sulfonate 6-methyl-2,4-bis(propan-2-yl)naphthalene-1-sulfonate sulfate

Test material form:

solid: particulate/powder

Details on test material:

Test Item:
Chemical name: Naphthalenesulfonic acid, bis(1-methylethyl)-, methyl derivs., sodium salt
Batch No.: 1452486
CAS No.: 68909-82-0
EC No.: 272-715-8
Molecular weight: 320 g/mol (mean value)
Appearance: Tan powder
Content: 75.98 % Actives
15.61 % Salt (alcohol insoluble)
7.42 % Unsulfonated oil
0.99 % Moisture
Certificate of analysis: Certificate of Analysis from AkzoNobel Surface Chemistry EMEIA, RD&I, dated, 2016-08-15 and MSDS
Storage conditions: Ambient temperature, store dry in original container
Date of production: 2016-06-08
Expiry date: 2021-06-07

Results and discussion

Any other information on results incl. tables

Results

In the investigation of self-ignition in the Grewer Oven for the pure test item an exothermic process was detected from above 200 °C, which led to a maximum temperature of approx. 650 °C (395 °C above the corresponding temperature of the reference material). A black grey residue remained in the wire basket after the test.

For the test item in mixture with Kieselguhr also an exothermic process was detected from above 200 °C, which led to a maximum temperature of approx. 645 °C (360 °C above the corresponding temperature of the reference material).

Table 1 summarises 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	200	650	---
Test item in mixture with Kieselguhr (1:1)	200	645

Applicant's summary and conclusion

Interpretation of results:

Category 2 (self-heating substances and mixtures) based on GHS criteria

Conclusions:

Final Results / Classification:
The pure test item indicated self-ignition at atmospheric pressure starting at a temperature of 200 °C. Due to the high onset temperature in the Grewer Oven, it can be assumed that the UN Test N.4 using the 25 mm cube sample at 140 °C is negative.

On the basis of the results of the tests on the self-ignition in the Grewer Oven the test item is classified as follows:

UN Transport Regulation: The test item is not classified as self-heating substance in class 4, division 4.2 according to the UN Transport Regulation, if the test item is handled in containers with a volume of < 3 m³.
If the test item is handled in containers > 3 m³ it is classified as self-heating substance in class 4, division 4.2 and assigned to packing group III.

GHS / CLP Regulation EC 1272/2008 Annex 1: 2.11: The test item is not classified as self-heating substance according to GHS/CLP Regulation EC 1272/2008 Annex 1: 2.11, respectively, if the test item is handled in containers with a volume of < 3 m³.
If the test item is handled in containers > 3 m³, it must be classified as a self-heating substance and assigned to category 2.

Executive summary:

Summary

The pure test item indicated self-ignition at atmospheric pressure starting at a temperature of 200 °C. Due to the high onset temperature in the Grewer Oven, it can be assumed that theUN Test N.4 using the 25 mm cube sample at 140 °C is negative.

On the basisof the results of the tests on theself-ignition in theGrewer Oven the test item is classified as follows:

UN Transport Regulation: The test item is not classified as self-heating substance in class 4, division 4.2 according to the UN Transport Regulation, if the test item is handled in containers with a volume of < 3 m³.

If the test item is handled in containers > 3 m³ it is classified as self-heating substance in class 4, division 4.2 and assigned to packing group III.

GHS / CLP Regulation EC 1272/2008 Annex 1: 2.11: The test item is not classified as self-heating substance according to GHS/CLP Regulation EC 1272/2008 Annex 1: 2.11, respectively, if the test item is handled in containers with a volume of < 3 m³.

If the test item is handled in containers > 3 m³, it must be classified as a self-heating substance and assigned to category 2.