Dodecyltrimethylammonium bromide

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:

from 2018-05-23 to 2018-11-13

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)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Key result

Test procedure:

burning rate test: preliminary screening test

Burning time:

120 s

Moisture (wt %):

0

Preliminary test

The test item could be ignited at a room temperature when flame source was applied for at least 2 minutes. The test item burned over 200 mm within more than 120 s (120 s for 35 mm). The test item melted and the melt also burned.

Main test

No main test was performed as the test item burned very slowly in the preliminary test.

Interpretation of results:

not classified based on GHS criteria

Conclusions:

The test item is not classified as flammable solid.

Executive summary:

A preliminary test according to UN N.1 was performed to determine the flammability of the test substance. The test item was formed into a powder train. The flame from a gas burner was applied to one end of the powder train for 2 minutes. The burning of the pile was observed. The test item could be ignited at room temperature using a flame as ignition source being applied for at least 2 minutes. The test item burned over 200 mm within more than 120 s (120 s for 35 mm). The test item melted and the melt did also burn. The test item burned very slowly, therefore, the test item is not classified as readily combustible solid in class 4.1 or as flammable solid according to GHS / CLP Regulation EC 1272/2008 Annex 1: 2.7.

Reference 2

Endpoint:

pyrophoric liquids

Data waiving:

study technically not feasible

Justification for data waiving:

the study does not need to be conducted because the substance is a solid

Reference 3

Endpoint:

flammable gases

Data waiving:

study technically not feasible

Justification for data waiving:

the study does not need to be conducted because the substance is a solid

Reference 4

Endpoint:

substances / mixtures which in contact with water emit flammable gases

Data waiving:

study scientifically not necessary / other information available

Justification for data waiving:

the study does not need to be conducted because the experience in production or handling shows that the substance does not react with water, e.g. the substance is manufactured with water or washed with water

Reference 5

Endpoint:

pyrophoric solids

Data waiving:

study scientifically not necessary / other information available

Justification for data waiving:

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) and hence, the classification procedure does not need to be applied

Reference 6

Endpoint:

self-heating substances / mixtures

Type of information:

experimental study

Adequacy of study:

key study

Study period:

from 2018-05-23 to 2018-11-13

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Reason / purpose for cross-reference:

reference to same study

Qualifier:

according to guideline

Guideline:

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

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Key result

Test procedure:

25 mm sample cube at 140°C

Max. temp. reached:

400

Result:

other: Based on this result, self-ignition in a 1 L sample volume at 140 °C cannot be excluded

Interpretation of results:

study cannot be used for classification

Conclusions:

The pure test item indicated a self-ignition at atmospheric pressure at approx. 150 °C. Based on this result, self-ignition in a 1 L sample volume at 140 °C can’t be excluded.

Executive summary:

A screening test using the Grewer oven was perfomed to determined the self-ignition and self-heating properties of the pure substance. The pure test item indicated a self-ignition at atmospheric pressure at approx. 150 °C. Based on this result, self-ignition in a 1 L sample volume at 140 °C cannot be excluded. For a classification according to UN Transport regulation and GHS / CLP regulation further tests have to be performed according to UN Test N.4.

Description of key information

The substance has not to be classified as flammable solid, flammable gas, flammable liquid, pyrophoric solid, pyrophoric liquid, flammable in contact with water, flammable aerosol or self-heating substance.

Key value for chemical safety assessment

Flammability:

not classified

Additional information

Flammable solids (reference 4.13-1)

A preliminary test according to UN N.1 was performed to determine the flammability of the test substance. The test item was formed into a powder train. The flame from a gas burner was applied to one end of the powder train for 2 minutes. The burning of the pile was observed.The test item could be ignited at room temperature using a flame as ignition source being applied for at least 2 minutes. The test item burned over 200 mm within more than 120 s (120 s for 35 mm). The test item melted and the melt did also burn. The test item burned very slowly, therefore, the test item is not classified as readily combustible solid in class 4.1 or as flammable solid according to GHS / CLP Regulation EC 1272/2008 Annex 1: 2.7.

Flammable liquids (reference 4.11-1)

In accordance with column 2 Annex VII section 7.9 of Regulation (EC) No 1907/2006 (REACH), the test on flash point does not need to be conducted as the test substance is solid.

Flammable gases (4.13-3)

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.

Pyrophoric liquids (reference 4.13-5)

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.

Pyrophoric solids (reference 4.13-4)

In accordance with section 2.10.4.1, Annex I of Regulation (EC) No 1272/2008, the classification procedure for pyrophoric solids need not to be applied when experience in manufacture or handling shows that the substance or mixture does not ignite spontaneously on coming into contact with air at normal temperatures (i.e. the substance is known to be stable at room temperature for prolonged periods of time (days)). Thus, no study was conducted and the substance was not considered for classification as pyrophoric solid.

Self-heating substances and mixtures (reference 4.13-2)

A screening test using the Grewer oven was perfomed to determined the self-ignition and self-heating properties of the pure substance. The pure test item indicated a self-ignition at atmospheric pressure at approx. 150 °C. Based on this result, self-ignition in a 1 L sample volume at 140 °C cannot be excluded. For a classification according to UN Transport regulation and GHS / CLP regulation further tests have to be performed according to UN Test N.4.

Substances which, in contact with water, emit flammable gases (4.13-6)

In accordance with column 2 of REACH Annex VII and with Regulation (EC) No 1272/2008 Annex I, section 2.12.4.1(b) the classification procedure for this hazard class need not 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.

Justification for classification or non-classification

Classification, Labelling, and Packaging Regulation (EC) No. 1272/2008

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, as amended for tenth time in Regulation (EC) No. 2017/776, and UN GHS Rev 7 (2017) 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.