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Auto flammability

Link to relevant study record(s)

Reference

Endpoint:

auto-ignition temperature (liquids)

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2019-2020

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.15 (Auto-Ignition Temperature (Liquids and Gases))

Version / remarks:

2008

Qualifier:

equivalent or similar to guideline

Guideline:

DIN 51794 (Testing of mineral oil hydrocarbons - Determination of ignition temperature)

Principles of method if other than guideline:

Not applicable

GLP compliance:

yes (incl. QA statement)

Remarks:

Inspected on 15-16/11/2017, Signed on 15/05/2018

Key result

Auto-ignition temperature:

285 °C

Atm. press.:

>= 994.6 - <= 1 001.2 mBar

Result and Validity

Result

The requirements for repeatability of the DIN standard are stated as follows: Three lowest values of the main test have to lie within a range of 5 °C (if auto ignition temperature is below 300 °C).

The following lowest values were recorded:

Lowest Values Main Test

Experiment	Value (rounded to integer)	Ignition delay	Seconds*
First test series	291 °C	35 s	9
Second test series	289 °C	66 s	9
Third test series	288 °C	34 s	9

*Seconds used to form the string.

 

The lowest value of the auto ignition temperature is 288 °C. This value was determined using 9 seconds to form a string of the test item. The test item showed auto ignition after 34 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 285 °C.

Validity

In the DIN, the following limits are applied to the range of lowest values which may be used for evaluation:

 Acceptable ranges

Auto ignition temp.	Range
< 300 °C	difference between three values of the main test max. 5 °C

 

The three lowest values of the main test lay within a range of 5 °C (as required for auto ignition temperatures above 300 °C). The largest difference between measuredignitiontemperatures was 3 K.

Conclusions:

The auto ignition temperature is stated as 285 °C.

Executive summary:

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.

Description of key information

The auto ignition temperature is stated as 285 °C.

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:

285 °C

Additional information

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

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