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Physical & Chemical properties

Auto flammability

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Reference
Endpoint:
auto-ignition temperature (liquids)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
20 November 2014 - 25 November 2014
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
GLP compliance:
no
Key result
Auto-ignition temperature:
255 °C
Atm. press.:
> 1 011.9 - < 1 013.9 hPa

An ignition is denoted as “+” and no ignition is denoted as “-“.

Table 1. Results of the preliminary test

 Temperature (°C)  Ignition

 304

 +

 290

 +
 275  +
 259  -
 263  -
 Atmospheric pressure: 1011.2 - 1013.7 hPa   

In the preliminary test, the lowest temperature at which an ignition occurred was 275 °C.

Table 2. Determination of the main test series

 1st main test series        2nd main test series        3rd main test series      
 Temperature (°C)  Droplets  Ignition  Temperature (°C)  Droplets  Ignition  Temperature (°C)  Droplets  Ignition
 275  5  +  258  10  +  258  5  +
 269  5  +  256  10  -  256  10  +
 265  5  +  256  9  -  253  10  -
 258  5  -  257  8  -  254  9  -
 256  10  -  256  7  -  255  8  -
 256  9  -  256  6  -  254  7  -
 257  8  -  255  5  -  255  6  -
 256  7  -  256  4  -  254  5  -
 256  6  -  255 3   - 254   4  -
 257  5  -  257  2  -  255  3  -
 257  4  -  255  1  -  254  2  -
 256  3  -        253 1 - 
 256 2  -            
 256  1  -            
 Atmospheric pressure: 1013.3 - 1013.9 hPa        Atmospheric pressure: 1013.1 hPa        Atmospheric pressure: 1011.9 hPa      

Table 3. 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)
1 258 257 1013.3 – 1013.9
2 258 257 1013.1
3 256 255 1011.9

According to observations in the main test series, the auto-ignition temperature rounded down with an accuracy of 5 °C was determined to be 255 °C.

Conclusions:
The test material has an auto-ignition temperature of 255°C.
Executive summary:

The test material has an auto-ignition temperature of 255 °C. The study was carried out according to EU method A.15 and is considered to be reliable without restriction (Klimisch 1).

Description of key information

The test material has an auto-ignition temperature of 255 °C.

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
255 °C

Additional information

The test material has an auto-ignition temperature of 255 °C (2015). The study was carried out according to EU method A.15 and is considered to be reliable without restriction (Klimisch 1). According to ECHA guidance "Guidance on Information Requirements and Chemical Safety Assessment; Chapter R.7A: Endpoint specific guidance" (December 2016), the auto-ignition temperature for liquids is not used directly for classification and labeling according to regulation (EC) 1272/2008, however it can be used in the chemical safety assessment.