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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:
2021-11-22 to 2021-11-25
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 EN 14522, Method P (Determination of the auto ignition temperature of gases and vapours)
Version / remarks:
2005
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:
264 °C
Atm. press.:
998.6 hPa
Remarks on result:
other: Main Test

Preliminary Test


In a preliminary test, an approximate value of the ignition temperature of the test item was first determined. Table 1 shows the result of the preliminary test. An ignition is marked with "+" and no ignition with "-". At each temperature, 5 drops were added to the Erlenmeyer flask.  
































 



Preliminary test



Temperature/˚C



203



253



303



295



283



273



Ignition/+/-



-



-



+



+



+



-



 



Atmospheric pressure: 1008.8 hPa



In the preliminary test, the lowest temperature at which an ignition occurred was 283 °C.


Main Test


The lowest temperatures at which an ignition occurred in the main test provided in the table.


Table: Lowest temperatures at which an ignition occurred






























Main test series



Lowest temperatures of an ignition



Highest temperatures without an ignition



Atmospheric Pressure



1



267 °C



266 °C



1012.5 – 1017.5 hPa



2



264 °C



262 °C



1009.8 - 1011.2 hPa



3



267 °C



264 °C



998.6 hPa



 


Based on the results of the main test series, the lowest auto-ignition temperature was 264 °C.


Regulation (EC) No 440/2008 and DIN 51794: The auto-ignition temperature, rounded to the nearest multiple of 5 °C, was found to be 260 °C.


For information: DIN EN 14522: The auto-ignition temperature reduced by 1.5 % and rounded to the nearest integer temperature was determined as 260 °C.


Temperature classes


According to DIN EN ISO/IEC 80079-20-1 the test item was assigned to temperature class T3 (see the following Table).


Table : Temperature classes









































Auto-Ignition Temperature



Temperature Class



Maximum allowed surface temperature



> 450 °C



T1



450 °C



450 °C ≥ x > 300 °C



T2



300 °C



300 °C ≥ x > 200 °C



T3



200 °C



200 °C ≥ x > 135 °C



T4



135 °C



135 °C ≥ x > 100 °C



T5



100 °C



100 °C ≥ x > 85 °C



T6



85 °C


Conclusions:
The test item has an auto-ignition temperature of 260 °C according to the Regulation (EC) No 440/2008 Method A.15. Auto-Ignition Temperature (Liquids and Gases) and DIN 51794 (2003): Testing of mineral oil hydrocarbons – Determination of ignition temperature.
Executive summary:

The test item has a waxy consistency at room temperature and a melting range of 31 to 44 °C. Due to the low melting point, the self-ignition temperature was determined for safe handling of the test item. The test item has an auto-ignition temperature of 260 °C according to the Regulation (EC) No 440/2008 Method A.15. Auto-Ignition Temperature (Liquids and Gases) and DIN 51794 (2003): Testing of mineral oil hydrocarbons – Determination of ignition temperature. According to ECHA guidance - Information requirements and guidance on chemical safety assessment; Chapter R.7A: Endpoint Specific Guidance, July 2017 - Autothermal temperature for liquids is not directly used for classification and labeling according to Regulation (EC) 1272/2008. However, it can be used in the chemical safety assessment to consider the risks associated with the processing of the substance. According to DIN EN ISO/IEC 80079-20-1, the test item was assigned to temperature class T3.

Description of key information

The test item has an auto-ignition temperature of 260 °C according to the Regulation (EC) No 440/2008 Method A.15. Auto-Ignition Temperature (Liquids and Gases) and DIN 51794 (2003): Testing of mineral oil hydrocarbons – Determination of ignition temperature.

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
260 °C

Additional information

The test item has a waxy consistency at room temperature and a melting range of 31 to 44 °C. Due to the low melting point, the self-ignition temperature was determined for safe handling of the test item. The test item has an auto-ignition temperature of 260 °C according to the Regulation (EC) No 440/2008 Method A.15. Auto-Ignition Temperature (Liquids and Gases) and DIN 51794 (2003): Testing of mineral oil hydrocarbons – Determination of ignition temperature. According to ECHA guidance - Information requirements and guidance on chemical safety assessment; Chapter R.7A: Endpoint Specific Guidance, July 2017 - Autothermal temperature for liquids is not directly used for classification and labeling according to Regulation (EC) 1272/2008. However, it can be used in the chemical safety assessment to consider the risks associated with the processing of the substance. According to DIN EN ISO/IEC 80079-20-1, the test item was assigned to temperature class T3.