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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:
March 16 to 26, 2015
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 substance is considered to be 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 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:
yes (incl. certificate)
Remarks:
inspected on 13 and 14 October 2014 / signed on 08 April 2015
Key result
Auto-ignition temperature:
290 °C
Atm. press.:
>= 98 454 - <= 100 587 Pa

The following lowest values were recorded:

 

Table 4.12/1: Lowest Values Main Study

 

Experiment

Value

Ignition delay

Drops used

First test series*

346 °C

13 s

9

Second test series

292 °C

68 s

4

Third test series

296 °C

101 s

20

Fourth test series

293 °C

71 s

4

 *As the first test series was considered to be biased by decomposition products of the incomplete combusted test item from the pre-test it was not used for evaluation.

Atmospheric pressure is measured between 984.54 and 1005.87 hPa.

 

The lowest value of the auto ignition temperature is 292 °C. This value was determined using 4 drops test item. The test item showed auto ignition after 68 seconds.

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, giving a value of 290 °C (984.54 -1005.87 hPa)

 

Validity

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

 

Table 4.12/2: Acceptable ranges

 

Auto ignition temperature

Range

< 300 °C

difference between 3 values of the main study max. 10 K

> 300 °C

difference between 3 values of the main study max. 20 K

 

The largest difference between measured ignition temperatures was 4 K. Therefore, the three lowest values of the main study lay within a range of 10 K (as required for auto ignition temperatures below 300 °C) and all measured values of the evaluated test series show good correlation.

No observations were made which might cause doubts concerning the validity of the study outcome.

Conclusions:
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 under GLP according to standard DIN 51794:2003 (listed in EU A.15 guideline).

Under the test conditions, the lowest temperature that will result in the ignition of the test item after being injected into the apparatus was determined as 290 °C between 984.54 and 1005.87 hPa. This value was determined using approximately 4 drops of test substance. The test substance showed auto ignition after 68 seconds

Description of key information

Considering the physical state of the substance (liquid at ambient temperature), the auto-ignition temperature test was taken into account to evaluate the auto-flammability properties of the substance:

The auto-ignition temperature of the test item is stated as 290 °C (at 984.54 - 1005.87 hPa.)

No particular hazard is anticipated in normal conditions of storage

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
290 °C

Additional information

A GLP fully reliable experimental study, conducted according to a recognized EU/DIN method, is available. Therefore, it is considered as a key study. 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.