Betaines, C12-16 (even numbered) -alkyldimethyl

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:

16/04/2010

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

GLP compliance:

yes

Test procedure:

burning rate test: preliminary screening test

Burning time:

345 s

Remarks on result:

other: From the preliminary screening test the sample was seen to burn in a time > 4 minutes and therefore no further testing is required.

Results of Preliminary Screening Test Rate of burning (over 200 mm) : 345 sec

From the preliminary screening test the sample was seen to burn in a time > 4 minutes and therefore no further testing is required.

Classification of substance : Not Highly Flammable

Comments: Initially on heating, the sample ignited with an orange flame slowly propagated along the sample train.

Interpretation of results:

not classified based on GHS criteria

Reference 2

Endpoint:

flammable solids

Type of information:

read-across from supporting substance (structural analogue or surrogate)

Adequacy of study:

key study

Justification for type of information:

1. HYPOTHESIS FOR THE ANALOGUE APPROACH
Both the source and target substances are UVCB alkyldimethyl betaines. The Source substance has an alkyl chain length distribution comprising mainly C12-14, whilst the target chain length distribution is C12-16. It is considered that the presence of a greater percentage of C16 chain lengths in the target will not affect the flammability of the substance compared to the C12-14 source.

2. SOURCE AND TARGET CHEMICAL(S) (INCLUDING INFORMATION ON PURITY AND IMPURITIES)
Source: betaines, C12-14 (even numbered) -alkyldimethyl [EC 931-700-2]
Target: betaines, C12-16 (even numbered) -alkyldimethyl [EC 947-036-1, CAS n/a]. Composition information per section 1.2

3. ANALOGUE APPROACH JUSTIFICATION
The Target substance contains approximately 30-35% of the Source substance (C12-14 betaines) in terms of betaines content, with the remaining 65-70% being the closely related C16 betaine. No data are available for the C16 betaine with regards to flammability. It is condered justified to read across from the C12-14 to the C12-16 betaines as the C16 betaine is not expected to contribute to the potential flammability of the substance.

4. DATA MATRIX
Source: betaines, C12-14 (even numbered) -alkyldimethyl [EC 931-700-2]: Not flammable; EU Method A.10
Target: betaines, C12-16 (even numbered) -alkyldimethyl [EC 947-036-1]: No data

Reason / purpose for cross-reference:

read-across source

Test procedure:

burning rate test: preliminary screening test

Burning time:

345 s

Remarks on result:

other: From the preliminary screening test the sample was seen to burn in a time > 4 minutes and therefore no further testing is required.

Description of key information

The substance is not flammable based on read-across to C12-14 betaines.

The substance is not pyrophoric, and does not release flammable gases in contact with water based on experience in use.

Key value for chemical safety assessment

Flammability:

not classified

Additional information

No studies are available for the substance itself. Data are read across from a study performed according to EU Method A.10 using the analogue substance C12 -14 betaines. In the preliminary screening test the sample was seen to burn in a time > 4 minutes and no further testing was required. The substance was not highly flammable.

Experience in use demonstrates that the substance in not pyrophoric and does not release flammable gases in contact with water.

Justification for classification or non-classification

Based on the results of a study performed using the C12 -14 betaines analogue, the substance is not flammable.

The substance is not pyrophoric, and does not release flammable gases in contact with water based on experience in use. Therefore, classification according to CLP is not required.