Naphthalenesulfonic acid, di-C9-rich C8-10-branched alkyl derivs., calcium salts

Flammability

Link to relevant study record(s)

Reference

Endpoint:

flammable solids

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2013

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: GLP study without deficiencies

Reason / purpose for cross-reference:

reference to other study

Qualifier:

according to guideline

Guideline:

EU Method A.10 (Flammability (Solids))

Deviations:

no

Qualifier:

according to guideline

Guideline:

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

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Test procedure:

burning rate test: preliminary screening test

Burning time:

ca. 6 s

Remarks on result:

other: After removal of the ignition source, the flame extinguished after 6 seconds and no propagation of combustion was observed.

The flame of the gas burner did ignite the test substance pile. The test substance melted, burned with a yellow flame and turned into a black residue. Black smoke was observed. After removal of the ignition source, the flame extinguished after 6 seconds and no propagation of combustion was observed.

No propagation of combustion of the test substance along 200 mm length of the pile within 4 minutes was observed. According to the guidelines, performance of the burning rate test is not required. Based on the results obtained, the test substance is considered ‘not highly flammable’.

The composition of the test substance and the structure of the main component were evaluated. The test substance does not contain groups that might lead to ignition in contact with water and/or to the evolution of a flammable gas. Moreover the test substance was dissolved in water during the determination of the water solubility. It demonstrated that the test substance does not ignite spontaneously in contact with water.

Interpretation of results:

GHS criteria not met

Conclusions:

The test substance is considered ‘not highly flammable’ and is not flammable on contact with water.

Executive summary:

The flammability of barium bis(di C8 -C10, branched, C9 rich alkylnaphthalene sulfonate) determined following EC no. 440/2008, Part A: Methods for the Determination of Physico-Chemical Properties, Guideline A.10: “Flammability (Solids)”. The flammability of the substance on contact with water followed EC A.12 and UN N.5.

Methods 

Determination of Flammability

The test substance was loosely filled into an aluminum mould of 250 mm long with a triangular cross-section of inner height of 10 mm and width of 20 mm. On both sides of the mould in a longitudinal direction two metal plates were mounted as lateral limitations that project 2 mm beyond the upper edge of the triangular cross section. The mould was dropped three times from a height of 2 cm onto a solid surface. If necessary, the mould was filled up again. The lateral limitations were removed and the excess substance was scraped off. A non-combustible and non-porous plate was placed on top of the mould. The complete assembly was inverted and the mould removed. A flame of a gas burner was applied to one end of the test substance pile until the test substance ignited. The pile was visually interpreted for propagation of combustion either by burning with a flame or smouldering. If applicable, the time of burning over a distance of 200 mm was measured after the pile had burned a distance of 50 mm. If the test substance does not propagate combustion along 200 mm of the pile within the 4 minutes test period the test substance is considered ‘not highly flammable’.

Determination of Flammability on Contact with Water

A test substance is considered highly flammable when it ignites spontaneously in contact with water, or evolves a flammable gas at a minimum rate of ≥ 1 litre/kg of the substance per hour. The molecular structure of the test substance is archived in the raw data. The composition of the test substance and the structure of the main component are archived in the raw data. The test substance does not contain groups that might lead to ignition in contact with water and/or to the evolution of a flammable gas. Moreover the test substance was dissolved in water during the determination of the water solubility (see 4.8 Water solubility.001). It demonstrated that the test substance does not ignite spontaneously in contact with water.

Results

The flame of the gas burner did ignite the test substance pile. The test substance melted, burned with a yellow flame and turned into a black residue. Black smoke was observed. After removal of the ignition source, the flame extinguished after 6 seconds and no propagation of combustion was observed.

No propagation of combustion of the test substance along 200 mm length of the pile within 4 minutes was observed. According to the guidelines, performance of the burning rate test is not required.

Based on the results obtained, the test substance is considered ‘not highly flammable’.

The composition of the test substance and the structure of the main component were evaluated. The test substance does not contain groups that might lead to ignition in contact with water and/or to the evolution of a flammable gas. Moreover the test substance was dissolved in water during the determination of the water solubility. It demonstrated that the test substance does not ignite spontaneously in contact with water.

Description of key information

The test substance is considered ‘not highly flammable’ and is not flammable on contact with water.

Key value for chemical safety assessment

Flammability:

non flammable