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Auto flammability

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Reference
Endpoint:
auto-ignition temperature (liquids)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
04 -05 June 2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Justification for type of information:
The study was conducted according to an internationally recognised method, and under GLP. The test substance is adequately characterised. Therefore full validation applies.
Qualifier:
according to guideline
Guideline:
EU Method A.15 (Auto-Ignition Temperature (Liquids and Gases))
Version / remarks:
2008
Deviations:
no
Qualifier:
according to guideline
Guideline:
DIN EN 14522, Method P (Determination of the auto ignition temperature of gases and vapours)
Version / remarks:
2005
Deviations:
no
Principles of method if other than guideline:
Not applicable
GLP compliance:
yes
Remarks:
Inspected on 4,5 and 6 July 2016/ Signed on 10 January 2017
Key result
Auto-ignition temperature:
264 °C
Atm. press.:
971 hPa

Two trials were conducted. In the first one, the preselected auto-ignition temperature was set to 150°C but no ignition occurred and the test stopped automatically. In the second one, the preselected auto-ignition temperature was set to 350°C. The auto-ignition of the substance was tested in varying amount of substance (between 2 and 11 droplets) and temperature (between 265 and 280°C).

Finally, three determinations were performed and then, three lowest auto-ignition temperatures were recorded as 268°C, 268°C and 268°C respectively using 8, 11 and 11 droplets.

 

As these temperatures did not differ by more than 2%, these results were considered as valid and the lowest value (268°C) wasretained. As described in DIN EN 14522:2005, the final auto-ignition temperature was obtained in reducing the retained value by the absolute deviation calculated using the reproducibility value (1.5% relative).

 

This value was rounded to the nearest 1 °C and a final auto-ignition temperature (END IP VALUE in raw data) of 264°C was obtained.

 

Moreover, the apparatus control was performed less than 6 months before the test (control between 25 April and 27 April 2018 and measurements dated on 04 to 06 June 2018). The lowest auto-ignition temperature measured for each reference substance did not differ by more than 1.5% from the reference value.

 

Therefore, the results of this study were considered as valid.

Conclusions:
The auto-ignition temperature of test item was determined to be 264°C (lowest value of three determinations).
This parameter/method is not relevant for classification, however the information is useful regarding potential additional fire hazard. No particular hazard is anticipated in normal conditions of storage.
Executive summary:

The study was performed in order to determine the auto-ignition temperature of test item according to EU A.15 guideline.

The auto-ignition temperature of test item was determined to be 264°C (lowest value of three determinations). This value was determined using approximately 8 drops of test substance at 971 hPa.

Description of key information

The corrected auto-ignition temperature of the test item was determined to be 264°C at 971 hPa (lowest value of three determinations).

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
264 °C

Additional information

A fully reliable experimental study, conducted according to EU A.15 guideline is available.

It is considered as a key study, and the result is retained as key data.

This parameter 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.