Quaternary ammonium compounds, (hydrogenated tallow alkyl)trimethyl, chlorides

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 16 January 2019 t0 13 February 2019

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.10 (Flammability (Solids))

Deviations:

no

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:

ca. 236.06 s

Key result

Test procedure:

burning rate test over 100 mm length

Burning time:

ca. 83.34 - ca. 102.88 s

Results

Safety Pre-Test

First, a safety test was performed. A small amount of the test substance was heated on a magnesia groove with a gas burner in order to derive safety precautions. The test substance melted into a clear and white-coloured liquid. The liquid burned with an orange flame. Light black-coloured residue was observed.

Preliminary Screening Test

In the preliminary screening test following the EU and UN method, the test item was heated with the flame of a teclu burner. When ignited with the flame of a teclu burner, the test substance started to burn with an orange and sooting flame. The test item melted and carbonized. Black residue was observed. The combustion with flame of the test item propagated the 200 mm within 3 min and 56.06 sec. Therefore, a burning rate for EU-regulations were performed. The burning rate showed the combustions propagated the 100 mm between 1 min 23.34 sec and 1 min 42.88 sec. Therefore, the burning rate according to the EU-regulation was determined.

Determination of BurningRate

Six experiments were performed. The data are given in the table below.

Performing	Time
1	1 min 40.41 sec
2	1 min 23.34 sec
3	1 min 34.76 sec
4	1 min 42.88 sec
5	1 min 29.90 sec
6	1 min 31.12 sec

Discussion

The burning rate of the preliminary screening test showed the combustions propagated the 200 mm in more than 2 minutes (UN-regulations) but less than 4 minutes (EU-regulations). The shortest burning time showed the combustions propagated the 100 mm in more than 45 seconds. Therefore, the test item RM1008688 should be considered as not highly flam- mable (for EU regulations) and as non-flammable solid (for UN regulations). No observations were made which might cause doubts concerning the validity of the study outcome.

Conclusions:

Under the study conditions, the test substance was determined to be not highly flammable.

Executive summary:

A study was conducted to determined the flammability of the test substance, C16-18 TMAC (100% active), according to the EU Method A10, in compliance with GLP. During the study, the burning rate of the preliminary screening test showed the combustions propagated the 200 mm in more than 2 minutes (3 min and 56.06 sec) (UN-regulations) but less than 4 minutes (EU-regulations). The shortest burning time showed the combustions propagated the 100 mm in more than 45 seconds (1 min 23.34 sec and 1 min 42.88 sec). Therefore, the test substance should be considered as not highly flammable (for EU regulations) and as non-flammable solid (for UN regulations). No observations were made which might cause doubts concerning the validity of the study outcome. Under the study conditions, the test substance was determined to be not highly flammable (Krebs, 2019).

Reference 2

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 3

Endpoint:

pyrophoric liquids

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

Description of key information

The flammability of the test substance was determined according to EU Method A.10 (Krebs, 2019).

Key value for chemical safety assessment

Flammability:

not classified

Additional information

A study was conducted to determined the flammability of the test substance, C16-18 TMAC (100% active), according to the EU Method A10, in compliance with GLP. During the study, the burning rate of the preliminary screening test showed the combustions propagated the 200 mm in more than 2 minutes (3 min and 56.06 sec) (UN-regulations) but less than 4 minutes (EU-regulations). The shortest burning time showed the combustions propagated the 100 mm in more than 45 seconds (1 min 23.34 sec and 1 min 42.88 sec). Therefore, the test substance should be considered as not highly flammable (for EU regulations) and as non-flammable solid (for UN regulations). No observations were made which might cause doubts concerning the validity of the study outcome. Under the study conditions, the test substance was determined to be not highly flammable (Krebs, 2019).

Justification for classification or non-classification

Based on the results of the recently conducted study, the test substance does not warrant a classification for flammability according to the EU CLP criteria (Regulation EC 1272/2008).