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Diss Factsheets

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:
13 to 15 June 2016
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. The substance is considered to be adequately characterised. Therefore full validation applies.
Qualifier:
according to guideline
Guideline:
EU Method A.15 (Auto-Ignition Temperature (Liquids and Gases))
Deviations:
no
Qualifier:
according to guideline
Guideline:
DIN 51794 (Testing of mineral oil hydrocarbons - Determination of ignition temperature)
Version / remarks:
2003
Deviations:
no
Principles of method if other than guideline:
Not applicable
GLP compliance:
no
Key result
Auto-ignition temperature:
250 °C
Atm. press.:
>= 98 231 - <= 98 427 Pa

Results

Table 4.12/1:  Lowest Values Main Study

Experiment

Value

Ignition delay

Drops used

First Test Series

259°C

37 s

9

Second Test Series

258°C

38 s

9

Third Test Series

254°C

43 s

9

 

The lowest value of the auto ignition temperature was 254 °C. This value was determined using 9 drops of test substance. The test substance showed auto ignition after 43 seconds.

The auto ignition temperature (result of determination) was the lowest value from the lowest values of the three experiments, rounded down to a whole multiple of 5 °C. Therefore, the auto ignition temperature was stated as 250°C.

Validity

The requirements for precision of the DIN standard in case of one observer and one test system (no interlaboratory testing, no second observer) were stated as follows: Sufficient accordance was reached if the largest difference between measured temperatures was

¨          at the most 5 °C for ignition temperatures up to 300 °C

¨          at the most 10 °C for ignition temperatures above 300 °C.

 

As the largest difference between measured ignition temperatures was 5 °C difference, therefore the validity criteria of the standard was fulfilled.

Conclusions:
Auto-ignition temperature of the test item was stated as 250 °C between 99,231 and 98.427kPa..
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 conducted according to procedure and demands of EU-Method A.15 and DIN 51794.

The auto ignition temperature was determined in three independent determinations. The lowest value of the auto ignition temperature is 254 °C. This value was determined using 9 drops of test substance. The test substance showed auto ignition after 43 seconds. The auto ignition temperature is the lowest value from the lowest values of the three experiments, rounded down to a whole multiple of 5 °C.

Therefore, the auto-ignition temperature of the test item is stated as 250 °C (98231 -98427 Pa).

Description of key information

The test item has been determined to have an auto-ignition temperature of 250°C under the test conditions (between 99,231 and 98,427 kPa).

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

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
250 °C

Additional information

A non-GLP study was performed in order to determine the auto-ignition temperature of the test substance in compliance with the EU-Method A.15 and stardard DIN 51794 listed in EU A15. 

The auto ignition temperature was determined in three independent determinations.

The lowest auto-ignition temperature of the test item was determined to be 254°C in the main test. Due to safety reasons and according to the guidelines the lowest measured temperature at which an ignition was observed was rounded to the next lower number divisible by 5.

The test substance has been determined to have an auto-ignition temperature of 250°C.