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Physical & Chemical properties

Auto flammability

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Endpoint:
auto-ignition temperature (liquids)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
From 2013-05-02 to 2013-05-03
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Remarks:
The study was conducted according to an internationally recognised method, and under GLP. No deviation was reported. The test substance is considered to be adequately characterised. Therefore full validation applies.
Qualifier:
according to guideline
Guideline:
EU Method A.15 (Auto-Ignition Temperature (Liquids and Gases))
Qualifier:
according to guideline
Guideline:
IEC 60079-4 (Electrical apparatus for explosive gas atmospheres. Part 4: Method of test for ignition temperature)
Version / remarks:
Anon (1987), Electrical apparatus for explosive gas atmospheres. Part 4: Method of test for ignition temperature. IEC Publications 79-4, p1-19.
GLP compliance:
yes (incl. QA statement)
Remarks:
UK GLP Compliance Programme (inspected on 10 July 2012 / signed on 30 Nov. 2012)
Auto-ignition temperature:
388 °C
Atm. press.:
101.2 - 102.1 kPa

Results of the auto-ignition temperature determination are shown in the following table:

Test temperature
(°C)
Test volume
(µL)
Ignition delay
(s)
Observations
200 (clean flask) 70 > 300 No ignition.
250 (clean flask) 70 > 300 No ignition. Grey fumes were emitted.
300 (clean flask) 70 > 300 No ignition. Grey fumes were emitted.
350 70 > 300 No ignition. Grey fumes were emitted.
400 70 8 An orange flame. Grey fumes were emitted.
380 (clean flask) 70 > 300 No ignition. Grey fumes were emitted.
390 (clean flask) 70 10 An orange flame. Grey fumes were emitted.
384 (clean flask) 70 > 300 No ignition. Grey fumes were emitted.
388 70 11 An orange flame. Grey fumes were emitted.
386 (clean flask) 70 > 300 No ignition. Grey fumes were emitted.
386 (clean flask) 200 > 300 No ignition. Grey fumes were emitted.
386 (clean flask) 400 > 300 No ignition. Grey fumes were emitted.
386 (clean flask) 600 > 300 No ignition. Grey fumes were emitted.
386 (clean flask) 800 > 300 No ignition. Grey fumes were emitted.
386 (clean flask) 1000 > 300 No ignition. Grey fumes were emitted.

Room temperature: 19 to 20 °C

Atmospheric pressure: 101.2 to 102.1 kPa

Conclusions:
This parameter/method is not relevant for classification, however the information is useful regarding process safety and potential additional fire hazard.
No particular hazard is anticipated in normal conditions of storage.
Executive summary:

The auto-ignition temperature of the test substance was measured, under GLP, according to IEC 79-4 method (listed in EU A15 guideline).

Different volumes of test substance were injected into a heated flask, until the lowest temperature at which ignition occurs was determined. The relevant parameters were recorded for the final result.

The measured auto-ignition temperature of the test substance is 388°C.

Endpoint:
auto-ignition temperature (liquids)
Type of information:
read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
key study
Justification for type of information:
Based on structural similarity (same isomers in a different ratio) and comparing normal flash points, respectively 99°C for the test substance (single isomer(cis); Firmenich 2013), and 104°C for the present dossier (multiconstituent, two isomers cis/trans; Harlan 2013d; please refer to IU section 4.11), the trans isomer is expected to have a slightly higher AIT. Therefore the result of the study will be considered as a limit value for the target substance.

Further information is included in IUCLID Section 13.
Reason / purpose for cross-reference:
read-across source
Reason / purpose for cross-reference:
read-across: supporting information
Reason / purpose for cross-reference:
read-across: supporting information
Key result
Auto-ignition temperature:
>= 388 °C
Atm. press.:
ca. 101 325 kPa
Conclusions:
This parameter/method is not relevant for classification, however the information is useful regarding process safety and potential additional fire hazard.
(from analogue) No particular hazard is anticipated in normal conditions of storage.
Executive summary:

The auto-ignition temperature of the analogue test substance was measured, under GLP, according to IEC 79-4 method (listed in EU A15 guideline).

Different volumes of test substance were injected into a heated flask, until the lowest temperature at which ignition occurs was determined. The relevant parameters were recorded for the final result.

The measured auto-ignition temperature of the test substance is 388°C.

A similar, or slightly higher, AIT is anticipated for the target substance.

Description of key information

No particular hazard is anticipated in normal conditions of storage. (from analogue)

AIT = 388°C for the cis-isomer; expected similar, or slightly higher for the target reaction mass.

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
388 °C

Additional information

No data is available on the substance itself. However, a reliable experimental study, conducted according to a recognized IEC/EC method and under GLP, is available on an analogue (single isomer). Based on compared flash points, minor difference is anticipated with the present dossier multiconstituent substance, the read-across is considered justified for a key study, and the result is retained as key data for purpose of CSA.

This parameter is not relevant for classification, however the information is useful regarding process safety and potential additional fire hazard.