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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

Principles of method if other than guideline:

Not applicable.

GLP compliance:

yes (incl. QA statement)

Remarks:

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

Key result

Auto-ignition temperature:

265 °C

Atm. press.:

>= 996.2 - <= 1 004.1 mBar

Findings

Determination of the viscosity

The test item was visually compared with the standard liquid Viscosity (50 mPa*s).The viscosity of the test item was below 50 mPa*s.

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 K (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	Drops used
First test series	271 °C	62 s	9
Second test series	267 °C	70 s	9
Third test series	270 °C	69 s	7

 

The lowest value of the auto ignition temperature is 267 °C. This value was determined using 9 drops test item. The test item showed auto ignition after 70 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 265 °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 under 300 °C). The largest difference between measuredignitiontemperatures was 4 °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:

The auto ignition temperature is stated as 265 °C.

Executive summary:

An experimental study, conducted in accordance with conditions recommended in OECD guideline and under GLP, is performed. The lowest value of the auto ignition temperature is 267 °C. This value was determined using 9 drops test item. The test item showed auto ignition after 70 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 265 °C. The three lowest values of the main test lay within a range of 5 °C (as required for auto ignition temperatures under 300 °C). The largest difference between measured ignition temperatures was 4 °C. 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 265 °C.

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:

265 °C

Additional information

An experimental study, conducted in accordance with conditions recommended in OECD guideline and under GLP, is performed. It should be considered as a key study. The result should be retained as key data.