Fatty acids, C14-18 and C18-unsatd., branched and linear, 2-ethylhexyl esters

Auto flammability

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

auto-ignition temperature (liquids)

Type of information:

experimental study

Adequacy of study:

weight of evidence

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

guideline study without detailed documentation

Qualifier:

according to guideline

Guideline:

ASTM E659 (Standard test method for autoignition temperature of liquid chemicals)

GLP compliance:

no

Key result

Auto-ignition temperature:

326 °C

Atm. press.:

747 mm Hg

Conclusions:

The auto flammability was determined at 326°C at the pressure of 747 hPa according to ASTM E659 method.

Reference 2

Endpoint:

auto-ignition temperature (liquids)

Type of information:

read-across based on grouping of substances (category approach)

Adequacy of study:

weight of evidence

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: Read across category

Key result

Auto-ignition temperature:

>= 235 - <= 240 °C

Atm. press.:

1 013 hPa

Table1 :Results of key studies on source chemicals for auto flammability

Name of the substance	CAS	Fatty acids chain length	Type of alcohol	MW	Appareance	Auto flammability
Fatty acids, C8-16, 2- ethylhexyl esters	135800-37-2	C8-16	2-ethylhexanol	256.42 – 368.65	Liquid	235°C at 1013hPa
Fatty acids, coco, 2-ethylhexyl esters	92044-87-6	C12-14	2-ethylhexanol	312.53 – 340.60	liquid	240°C at 1013hPa
2-Ethylhexyl palmitate	29806-73-3	C16	2-ethylhexanol	368.65	Liquid	No data
Fatty acids, C16-18 and C18-unsatd., 2-ethylhexyl esters	85049-37-2	C16-18, C18:1	2-ethylhexanol	368.65 – 396.7	Liquid	No data
Fatty acids, C16-18, 2-ethylhexyl esters	91031-48-0	C16-18	2-ethylhexanol	368.65 - 396.7	Liquid	No data
2-Ethylhexyloleate	26399-02-0	C18:1	2-ethylhexanol	394.67	Liquid	No data
2-Ethylhexylstearate	22047-49-0	C18	2-ethylhexanol	396.7	Liquid	236°C at 1013hPa

 

The physico-chemical properties of the category members are similar or follow a regular pattern over the category. Several members of the category have been tested for their auto flammability and they show values between 235 and 240°C. These very close and high values are related to the similarity of structures of the category members and to the lack of flammability hazard.

Since the target substance is surrounded by the categories members with experimental values, it can be deduced that its auto flammability will be ≥ 235°C.

Conclusions:

Based on the experimental results of the source chemicals of the category, the auto flammability of the target substance "isostearate 2-ethylhexyl is considered to be ≥ 235°C.

Description of key information

The auto flammability of the target substance "isostearate 2-ethylhexyl is considered to be  ≥ 235°C.

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:

235 °C

Additional information

Justification and rationale of the category approach for the isostearate 2-ethyl hexyl :

This category group covers 2-ethyl hexyl esters linked with fatty acid chains (C8 to C18) unsatured and satured. This category includes monoconstituent substances and UVCB substances varying fatty acid chain length. This category was made in order to provide sufficient information for physicochemical, ecotoxicological and toxicological caracterisation of the Fatty acids, C14-18 and C18-unsatd., branched

and linear, 2-ethylhexyl esters (CAS No 85186-76-1).

The category group includes:

- Fatty acids, C8-16, 2-ethylhexyl esters (CAS No 135800-37-2)

- Fatty acids, coco, 2-ethylhexyl esters (CAS No 92044-87-6)

- 2-Ethyl hexyl palmitate (29806-73-3)

- Fatty acids, C16-18 and C18-unsatd., 2-ethylhexyl esters (CAS No 85049-37-2)

- Fatty acids, C16-18, 2-ethylhexyl esters (CAS No 91031-48-0)

- 2-Ethylhexyl oleate (CAS No 26399-02-0)

- 2-Ethyl hexyl stearate (CAS No 22047-49-0)

Target substance for Category Approach : Fatty acids, C14-18 and C18-unsatd., branched and linear,

2-ethylhexyl esters (CAS No 85186-76-1)

In accordance with article 13 (1) of Regulation (EC) No. 1907.2006, “information on intrinsic properties of substances may be generated by means other than tests, provided that the conditions set out in Annex XI are met. In particular for human toxicity, environmental fate and ecotoxicity, information shall be generated whenever possible by means other than vertebrate animal tests which includes the use of information from structurally related substances (grouping or read across)”. Therefore, the available experimental data were collected and evaluated according to Annex XI requirements.

Summary of available information

Experimental results were obtained from key studies performed on Fatty acids C8-16, 2 -ethylhexyl esters, on Fatty acids coco, 2 -ethylhexyl esters and on Stearate 2 -ethylhexyl. The auto flammability values at atmospheric pression obtained for these category members are quite close, between 235 and 240°C. These very close and high values are related to the similarity of structures of the category members and to the lack of auto -flammability hazard. Since the target substance is surrounded by the categories members, it can be deduced that its auto-flammability will be between 235 and 240°C.

An experimental study on the target substance, isostearate 2 -ethylhexyl, was also  performed according to the ASTM E659 method (only  method and results provided) and it gives a value of 326°C at 995,9 hPa

Conclusion

According to the Regulation (EC) NO. 1907/2006, Annex XI, 1.5, A Read-Across Category for " "Long Chain Fatty Acids, 2 -ethylhexyl esters" was performed in order to provide information on Isostearate 2 -Ethylhexyl .

This category was based on common and shared properties as:

- common functional group,

- common precursors and the likelihood of common impurities resulting from common process of manufacturing

- chemically structurally similar breakdown products obtained via the same biological processes into the organisms, and

- constant pattern in the changing of the potency of the properties across the category.

Based on the auto-flammability values obtained with the category members, it can be deduced that the target substance as a high auto-flammability between 235 and 240°C and doesn't present any hazard. Moreover an experimental study on the target substance, isostearate 2 -ethylhexyl, was also performed and it gives a higher value of 326 °C (at quite lower vapor pressure), which nevertheless confirms the lack of auto flammability hazard. On the basis of a conservative approach applied to the very uniform results obtained on the category member, the lowest experimental result of the category ≥ 235°C at 1013 hPa is chosen as the representative auto flammability value for the substance "isostearate 2 -ethylhexyl".

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