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Diss Factsheets

Physical & Chemical properties

Auto flammability

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Administrative data

Link to relevant study record(s)

Reference
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:
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 affected the quality of the study. Purity is specified in the report, and isomers composition is available from the notifier. 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:
Inspected on 31 January 1994. Signed on 16 March 1994
Key result
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.

Description of key information

No particular hazard is anticipated in normal conditions of storage.

Key value for chemical safety assessment

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

Additional information

A fully reliable experimental study, conducted according to a recognized EU/IEC method and under GLP, is available. Therefore, it is considered as a key study, and the result is retained as key data.

It should be noted that, due to the multi-isomers nature of the substance tested, this result may refer to the most flammable one.

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