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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:
26 December - 27 December 2017
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:
EU Method A.15 (Auto-Ignition Temperature (Liquids and Gases))
Version / remarks:
2008
Deviations:
no
Qualifier:
according to
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:
442 °C
Atm. press.:
>= 958 - <= 977 hPa

Three 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 but no ignition occurred and the test stopped automatically.

In the third one, the preselected auto-ignition temperature was set to 550°C. The auto-ignition of the substance was tested in varying amount of substance (between 2 and 11 droplets) and temperature (between 447 and 459°C).

Finally, three determinations were performed and then, three lowest auto-ignition temperatures were recorded as 449°C, 454°C and 452°C respectively using 5, 5 and 8 droplets.

 

As these temperatures did not differ by more than 2%, these results were considered as valid and the lowest value (449°C) was retained. 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 of 442°C was obtained.

 

Moreover, the apparatus control was performed less than 6 months before the test (control between 18 October 2017 and 20 October 2017 and measurements dated on 26 to 27 December 2017). 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 442°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 442°C (lowest value of three determinations). This value was determined using approximately 5 drops of test substance between 958 and 977 hPa.

Description of key information

The auto-ignition temperature of test item was determined to be 442°C between 958 and 977 hPa. (lowest value of three determinations)

No particular hazard is anticipated in normal conditions of storage.

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
442 °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.