Naphthenic acids, bismuth salts

Flash point

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

flash point of flammable liquids

Data waiving:

study scientifically not necessary / other information available

Justification for data waiving:

other:

Reference 2

Endpoint:

flash point of flammable liquids

Type of information:

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

Adequacy of study:

supporting study

Reliability:

4 (not assignable)

Rationale for reliability incl. deficiencies:

secondary literature

Justification for type of information:

Data widely used worldwide - regularly reviewed (last review July 22nd 2015, last update July 1st 2014)

Qualifier:

equivalent or similar to guideline

Guideline:

ASTM D1310 (Standard test method for flash point and fire point of liquids by tag open-cup apparatus)

Deviations:

not specified

GLP compliance:

not specified

Type of method:

open cup

Specific details on test material used for the study:

Not specified in NIOSH report

Flash point:

ca. 149 °C

Atm. press.:

ca. 1 atm

Interpretation of results:

GHS criteria not met

Conclusions:

The flash point of naphthenic acids (organic moiety resulting from hydrolysis of bismuth naphthenate) is reported as 149 °C (open cup method) in the NIOSH, International Chemical Safety Cards (ICSC) # 1654; in conclusion it can be stated that bismuth naphthenate will not meet the criteria for being a flammable liquid, respectively flammable solid considering the low melting point of the substance.

Executive summary:

Bismuth naphthenate is an inorganic salt of an organic acid, derived from crude oil. Whereas naphthenic acids may vary in composition being UVCB substances, depending on the crude oil feedstock they have been derived from, in literature flash points are reported above 100 °C and typically in the range of 140 - 150 °C. In NIOSH International Chemical Safety Cards (ICSC) # 1654 a value of 149 °C (open cup method) is reported supporting the above. Thus, it can be reasonably assumed that bismuth naphthenate, either as such, being a low melting solid, or in solution as placed on the market, does not fulfill the criteria in CLP (Regulation EC No 1272/2008) for a flammable liquid / solid.

Description of key information

The flash point of naphthenic acids (organic moiety resulting from hydrolysis of bismuth naphthenate) is reported as 149 °C (open cup method) in the NIOSH, International Chemical Safety Cards (ICSC) # 1654; in conclusion it can be stated that bismuth naphthenate will not meet the criteria for being a flammable liquid, respectively flammable solid considering the low melting point and the extremely low vapour pressure (< 1 Pa) of the substance. For hazard and risk assessment the worst-case value for naphthenic acids (flashpoint ~149 °C) is used.

Key value for chemical safety assessment

Flash point at 101 325 Pa:

149 °C