Naphthenic acids

Flammability

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

flammable solids

Data waiving:

study technically not feasible

Justification for data waiving:

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

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 organic substance does not contain metals or metalloids and hence, the classification procedure does not need to be applied

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

other:

Reference 4

Endpoint:

self-heating substances / mixtures

Data waiving:

study technically not feasible

Justification for data waiving:

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

Description of key information

waiver

Key value for chemical safety assessment

Flammability:

not classified

Additional information

Flammability is usually seen as the ease with which the substance can burn or be ignited. However it also includes spontaneously flammability (pyrophoricity) and ignition on contact with water. As is stated in the "Guidance on information requirements and chemical safety assessment, Chapter R.7a: Endpoint specific guidance" p 123-124, the absence of structural alerts makes testing unnecessary.

Pyrophoricity In the daily use and handling of naphthenic acid during which continuous exposure to air can occur, no spontaneous ignition is observed. The absence of structural alerts furthermore confirms that it is highly unlikely that naphthenic acid has pyrophoric properties.

Flammability in contact with water Under conditions where Naphthenic acids are in contact with water no ignition and/or liberation of flammable gases is observed. The absence of structural alerts furthermore confirms that it is highly unlikely that naphthenic acids are flammable in contact with water.

Flammability The flash point of naphthenic acids is determined to be >100°C (see IUCLID endpoint 4.11) which is well above the criteria for classification as a flammable liquid in accordance with Annex I, 2.6.2.1 of Regulation 1272/2008. It can be concluded that naphthenic acid is a non-flammable liquid.