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Physical & Chemical properties

Auto flammability

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Reference
Endpoint:
auto-ignition temperature (liquids)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2000-04-19 to 2000-10-31
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study without detailed documentation
Remarks:
The study was conducted according to an internationally recognised method, and under GLP. Purity is specified, and isomers composition is available from the notifier. However, some informations are missing. Therefore full validation cannot apply.
Qualifier:
according to
Guideline:
EU Method A.15 (Auto-Ignition Temperature (Liquids and Gases))
GLP compliance:
yes (incl. certificate)
Remarks:
France, GIPC (inspection on February 23, 2000, signed on June 07, 2000)
Specific details on test material used for the study:
Storage condition of test material: amber glass flask in darkness at room temperature under nitrogen.
Key result
Auto-ignition temperature:
388 °C
Atm. press.:
96.9 - 97.2 kPa
Remarks on result:
other: precision: +/-3°C

Preliminary test

Experimental conditions:

Atmospheric pressure:       from 96.9 to 97.2 kPa

Relative humidity:       from 48 to 75%

Apparatus:

Oven:       range of temperature from +20 to +600°C; accuracy +/-0.1°C

Micropipette:       range of volume from 50 µL to 200 µL; accuracy +/-1µL

Stopwatch:       accuracy +/-1/100 of second

Results:

Volume of test item injected in the oven:       70 µL

Number of injections:       10

Observed self-ignition temperature of the test item: 400°C after 5 seconds.

Main test

Experimental conditions:

Atmospheric pressure:       see results below

Relative humidity:       from 45 to 74%

Apparatus:

Same as the preliminary test

Results:

Volume of test item injected in the oven:       70 µL

Number of injections:       17

 Assay No.  Self-ignition temperature (°C)  Ignition lag (seconds)  Maximal temperature of the air recorded in the center of the test flask after self-ignition (°C)  Atmospheric pressure (kPa)
 1  387  5  425  96.9
 2  387  7  408  97.1
 3  389  6  401  97.2
 4  389  6  417  97.2
 5  389  5  431  97.2

 

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 EU A15 guideline.

The test substance was injected into a heated flask, until the lowest temperature at which ignition occurs was determined. The determination was repeated five times.

The auto-ignition temperature of the test substance has been determined to be 388°C at 96.9 - 97.2 kPa.

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:
388 °C

Additional information

A reliable experimental study, conducted according to a recognized EC method and under GLP, is available. Despite restrictions due to missing information in the report, it is considered as a key study, and the result is retained as key data for purpose of CSA.

It should be noted that, due to the multi-isomers nature of the substance tested, this result may refer to the most flammable one; however, as a single boiling point was observed, auto-ignition temperature is not anticipated to vary significantly between components.

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