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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:
2015-12-17 to 2015-12-22
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
Deviations:
no
Qualifier:
according to guideline
Guideline:
DIN 51794 (Testing of mineral oil hydrocarbons - Determination of ignition temperature)
Version / remarks:
2003
Deviations:
no
Qualifier:
according to guideline
Guideline:
DIN EN 14522, Method S (Determination of the auto ignition temperature of gases and vapours)
Version / remarks:
2005
Deviations:
no
GLP compliance:
no
Remarks:
The study was conducted under supervision of a quality assurance unit which had ensured e.g instrumentation validation, reagent/materials certification, analyst certification and providing standard operating procedures.
Key result
Auto-ignition temperature:
275 °C
Atm. press.:
> 1 010.5 - < 1 013.9 hPa

Lowest temperatures at which an ignition occurred

Main test series

Lowest temperatures of an ignition [°C]

Highest temperatures without an ignition [°C]

Atmospheric Pressure [hPa]

1

278

275

1010.5-1013.9

2

276

274

1011.2

3

276

274

1011.2

 

According to observations in the main test series, the auto-ignition temperature rounded down with an accuracy of 5 °C was determined to be 275 °C (according to Regulation EC No. 440/2008 and DIN 51794).

 

According to observations in the main test series, the auto-ignition temperature reduced by 1.5 % and rounded to the nearest integer temperature was determined as 272 °C. (according to DIN EN 14522).

Conclusions:
The test substance was determined to have an auto-ignition temperature of 275 °C.
Executive summary:

A study was conducted according to Regulation (EC) No 440/2008 Part A.15, DIN 51794 (2003) and DIN EN 14522 (2005) to determine the auto-ignition temperature of the test substance. In a preliminary test the approximately auto-ignition temperature were determined. For the main test three test series were conducted. The temperature determined in the preliminary test was used as starting point for the main test. The temperature was decreased by 2-7 K (semi-automated) or 1-2 K (fully automated) until no ignition was observed. The auto-ignition temperature rounded down with an accuracy of 5 °C was determined to be 275 °C at 1010.5-1013.9 hPa (according to Regulation EC No. 440/2008 and DIN 51794). According to DIN EN 14522 the auto-ignition temperature reduced by 1.5 % and rounded to the nearest integer temperature was determined as 272 °C.  According to criteria as laid down in DIN 51794 the auto ignition temperature is the lowest value out of three experiments rounded down to a whole multiple of 5 °C. Therefore the auto-ignition temperature was determined to be 275 °C at 1010.5-1013.9 hPa. All three values lay within a range of 10 K. No observations were made which might cause doubts concerning the validity of the study outcome. Thus, the validation criteria were fulfilled.

Description of key information

The test substance was determined to have an auto-ignition temperature of 275 °C.

 

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
275 °C

Additional information

A study was conducted according to Regulation (EC) No 440/2008 Part A.15, DIN 51794 (2003) and DIN EN 14522 (2005) to determine the auto-ignition temperature of the test substance. Three test series were conducted. The temperature determined in the preliminary test was used as starting point for the main test. The temperature was decreased by 2-7 K (semi-automated) or 1-2 K (fully automated) until no ignition was observed. The auto-ignition temperature rounded down with an accuracy of 5 °C was determined to be 275 °C at 1010.5-1013.9 hPa.