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Diss Factsheets

Physical & Chemical properties

Auto flammability

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Reference
Endpoint:
auto-flammability
Type of information:
experimental study
Adequacy of study:
key study
Study period:
From 4 to 6 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. 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:
400 °C
Atm. press.:
>= 101 104 - <= 101 714 Pa

Results

Table 4.12/1: Auto ignition temperature – results

Experiment

Value

Ignition delay

Drops used

First test series

401.6 °C

8 s

5

Second test series

401.1 °C

9 s

5

Third test series

405.9 °C

9 s

5

The lowest value of the auto ignition temperature is 401 °C. This value was determined using 5 drops of test substance. The test substance showed auto ignition after 9 seconds.

The auto ignition temperature (result of determination) 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 is stated as 400 °C.

The three lowest values of the main study lay within a range of 10 °C (as required for auto ignition temperatures above 300°C.

Precision

The requirements for precision of the DIN standard in case of one observer and one test system (no interlaboratory testing, no second observer) are stated as follows: Sufficient accordance is 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.

The three lowest values of the main test lay within a range of 10 °C (as required for auto ignition temperatures above 300 °C). The largest difference between measured ignition temperatures was 5 °C.

Discussion

The study was conducted according to procedure and demands of EU-Method A.15 and DIN 51794. The acceptable range which is demanded in the DIN standard was fulfilled.

All measured values show good correlation. No observations were made which might cause doubts concerning the validity of the study outcome.

Conclusions:
Under the test conditions, the auto-ignition temperature of the test item was stated as 400 °C between 101104 and 101714 Pa.
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 401 °C. This value was determined using 5 drops of test substance. The test substance showed auto ignition after 9 seconds.

The auto ignition temperature (result of determination) 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 is stated as 400 °C.

Therefore, the auto-ignition temperature of the test item is stated as 400 °C (101104 -101714 Pa).

Description of key information

The test item has been determined to have an auto-ignition temperature of 400°C under the test conditions (101104 -101714 Pa).

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:
400 °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. Therefore, it should be considered as a key study. The result should be retained as key data.

 

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