Equimolecular mixture of - Disodium 2-Hexadecylsulfanyl-1-(4-sulfo-butyl)-1H- benzoimidazole-5-sulfonate - Disodium 2-Hexadecylsulfanyl-3-(4-sulfo-butyl)-1H- benzoimidazole-5-sulfonate

Flammability

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

substances / mixtures which in contact with water emit flammable gases

Type of information:

other: Statement (based on the composition, the molecular structure of the major component and the minor components) + experimental result

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: Statement based on molecular structure

Qualifier:

according to guideline

Guideline:

EU Method A.12 (Flammability (Contact with Water))

GLP compliance:

yes

Test procedure:

other: Addition of water to test sample

Remarks on result:

no reaction with water observed

The molecular structure of the major component in the test substance does not contain groups that might lead to evolution of highly flammable gases in dangerous quantities when coming into contact with damp air of water.
Furthermore, no boron or silicon is present.
The minor components are about 5 wt% V123093 (a test substance related component), about 3 wt% V3661 (C6H12O2
containing a monohydroxy alcohol and a ketone group) and about 1 mol% of the water soluble dimethylacetamide. Examination
of the composition of the test substance and the molecular structures of the minor components establish beyond reasonable doubt that the test substance is incapable of developing highly flammable gas(es) in dangerous quantities when coming into contact with water or damp air. It is also not to be expected that an interaction between the different
components occur.

In order to obtain some additional information, an experiment was performed in which double distilled water was added to a small amount of test substance (0.5g/50ml) : no spontaneous ignition took place and no evolution of gas occurred.

Interpretation of results:

not classified based on GHS criteria

Conclusions:

No reaction with water was observed.

Reference 2

Endpoint:

flammable solids

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.10 (Flammability (Solids))

Version / remarks:

at 100°C

Qualifier:

according to guideline

Guideline:

other: VDI2263 at 100°C

GLP compliance:

yes

Test procedure:

burning time (test type not further specified)

Remarks:

or specified in description of method (migrated information)

Burning time:

> 45 s

According to VDI2263:

- result parameter: combustibility behaviour (type of reaction)

- result: no spreading of fire - brief ignition and rapid extinction

Interpretation of results:

not classified based on GHS criteria

Remarks:

Migrated information

Conclusions:

Interpretation of results:
* not highly flammable (according to A.10);
* class 2 (brief ignition and rapid extinction) (according to VDI2263)

Reference 3

Endpoint:

flammable solids

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.10 (Flammability (Solids))

Qualifier:

according to guideline

Guideline:

other: VDI2263 at room temperature

GLP compliance:

yes

Test procedure:

burning time (test type not further specified)

Remarks:

or specified in description of method (migrated information)

Burning time:

> 45 s

According to VDI2263:

- result parameter: combustibility behaviour (type of reaction)

- result: no spreading of fire - no ignition

Interpretation of results:

not classified based on GHS criteria

Remarks:

Migrated information

Conclusions:

Interpretation of results:
* not highly flammable (according to A.10)
* class 1 (no ignition) (according to VDI2263)

Reference 4

Endpoint:

pyrophoric solids

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.13 (Pyrophoric Properties of Solids and Liquids)

GLP compliance:

yes

Test procedure:

ignition time on contact with air

Remarks:

Ignition on contact with air refers to either Pyrophoric solids or Pyrophoric liquids depending on physical state (migrated information).

Remarks on result:

no ignition on contact with air (not further specified)

Remarks:

corresponding to 'no' in migrated source record.

The molecular structure of the major component does not contain any chemical group that might lead to spontaneous ignition a short time after coming into contact with air.

The minor components are about 5wt% v123093 (a test substance related component), about 3wt% v3661 (C6H12O2 containing a monohydroxyalcohol and a ketone group) and about 1mol% dimethylacetamide. Examination of the composition of the test substance and the molecular structures of the minor components establish beyond reasonable doubt that the test substance is not pyrophoric. it is not expected that an interaction between the different components occur making the test substance pyrophoric.

Furthermore, experience in handling during other Notox projects (e.g. Notox Project 407879 and 408443) shows that the test substance does not ignite spontaneously after coming in contact with air at room temperature (circa 20°C).

Interpretation of results:

not classified based on GHS criteria

Conclusions:

Based on the structure, no spontaneous ignition after coming into contact with air is expected.

Key value for chemical safety assessment

Flammability:

non flammable

Justification for classification or non-classification

Non-classification is based on the results of all performed studies: flammability at room temperature and at 100°C, flammability (contact with water) and pyrophoric properties.