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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:
1995-06-30 to 1995-07-26
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study
Remarks:
The study was conducted according to an internationally recognised method, and under GLP. No deviation affected the quality of the study. Purity is specified in the report, and isomers composition is available from the notifier.
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:
Inspected on 31 January 1994 / Signed on 16 March 1994
Auto-ignition temperature:
248 °C
Atm. press.:
100.86 - 102.23 kPa

The results detailed below were obtained during testing:

Test temperature
(°C)
Test volume
(µL)
Ignition delay
(s)
Observations
50 70 > 300 No ignition.
100 70 > 300 No ignition.
150 70 > 300 No ignition.
200 70 > 300 No ignition.
250 70 > 300 No ignition.
300 70 > 300 No ignition. Grey vapour emitted.
350 70 > 300 Yellow flame. Grey vapour emitted.
340 (clean flask) 70 6 Yellow flame. Grey vapour emitted.
320 (clean flask) 70 > 300 No ignition. Grey vapour emitted.
330 70 6 Yellow flame, loud 'pop'. Grey vapour emitted.
324 (clean flask) 70 2 Yellow flame, loud 'pop'. Grey vapour emitted.
322 (clean flask) 70 9 Yellow flame, loud 'pop'. Grey vapour emitted.
320 (clean flask) 200 3 Yellow flame, loud 'pop'. Grey vapour emitted.
310 (clean flask) 200 3 Yellow flame, loud 'pop'. Grey vapour emitted.
300 200 4 Yellow flame, loud 'pop'. Grey vapour emitted.
290 200 6 Yellow flame, loud 'pop'. Grey vapour emitted.
280 200 8 Yellow flame, loud 'pop'. Grey vapour emitted.
270 200 15 Yellow flame, loud 'pop'. Grey vapour emitted.
260 200 26 Yellow flame, loud 'pop'. Grey vapour emitted.
250 200 > 300 No ignition. Grey vapour emitted.
254 200 79 Yellow flame, loud 'pop'. Grey vapour emitted.
252 (clean flask) 200 > 300 No ignition. Grey vapour emitted.
252 (clean flask) 400 > 300 No ignition. Grey vapour emitted.
252 (clean flask) 600 96 Yellow flame, small 'pop'. Grey vapour emitted.
250 (clean flask) 600 > 300 No ignition. Grey vapour emitted.
250 (clean flask) 800 > 300 No ignition. Grey vapour emitted.
250 (clean flask) 1000 152 Yellow flame, small 'pop'. Grey vapour emitted.
248 (clean flask) 1000 121 Yellow flame, small 'pop'. Grey vapour emitted.
246 (clean flask) 1000 > 300 No ignition. Grey vapour emitted.
246 (clean flask) 1200 > 300 No ignition. Grey vapour emitted.
246 (clean flask) 1400 > 300 No ignition. Grey vapour emitted.
246 (clean flask) 1600 > 300 No ignition. Grey vapour emitted.
246 (clean flask) 1800 > 300 No ignition. Grey vapour emitted.

Room temperature: 19 -25°C

precision: +/-5°C

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 were injected into a heated flask, until the lowest temperature at which ignition occurs was determined. Volume, time lag for ignition and atmospheric pressure were recorded.

The auto-ignition temperature of the test substance is 248°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 (the target substance is one of the constituents of the source substance, together with isomers) and comparing normal flash points, respectively 160°C for the tested substance (multiconstituent, racemate pairs of three isomers; Toxicol 1992), and 173°C for the present dossier (single optical isomer; Firmenich 2010; please refer to IU section 4.11), both substances are not expected to have a significantly different AIT, or the target isomer may be slightly higher. 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:
>= 248 °C
Atm. press.:
>= 100.86 - <= 102.23 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 were injected into a heated flask, until the lowest temperature at which ignition occurs was determined. Volume, time lag for ignition and atmospheric pressure were recorded.

The auto-ignition temperature of the test substance is 248°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 = 248°C for the source reaction mass of isomers; expected similar, or slightly higher for the target isomer.

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
248 °C

Additional information

No data is available on the dossier substance itself, but a fully reliable experimental study, conducted according to a recognized EU/IEC method and under GLP, is available on an analogue substance (reaction mass of isomers).

Therefore, it is considered as a key study. It should be noted that, due to the multi-isomers nature of the substance tested, this result may refer to the most flammable one.

The present dossier substance is one of the components of the substance tested, together with isomers. Comparing their flash points, it is not anticipated to be more auto-flammable, so the experimental auto-ignition temperature result should be considered as a minimum value.

It is retained as a worst-case key data.

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