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Auto flammability

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Reference
Endpoint:
auto-flammability
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2015-12-11 to 2015-12-14
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))
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 P (Determination of the auto ignition temperature of gases and vapours)
Deviations:
no
GLP compliance:
no
Key result
Auto-ignition temperature:
450 °C
Atm. press.:
1 013.4 hPa

1. Preliminary test results:

In the preliminary test, the lowest temperature at which an ignition occured was 478°C

2. Main test:

2.1. Determination of the first main test series using the semi-automated apparatus ZT3:

1st main test series
Temperature (C°) Drops Ignition (+/-)
474 5 +
469 5 +
466 5 +
461 5 +
457 5 +
452 5 +
447 5 -
447 10 -
448 9 -
447 8 -
448 6 -
448 7 -
447 4 -
448 3 -
447 2 -
448 1 -
450 4 -
451 6 +
Atmospheric pressure: 1009.8 - 1014.3 hPa

2.2. Determination of the second and third main test series using the fully automated apparatus ZT2:

2nd Main test series 3rd Main test series
Temperature (C°) Drops Ignition (+/-) Temperature (C°) Drops Ignition (+/-)
452 4 + 453 4 +
452 4 - 451 4 -
450 3 - 450 3 -
450 2 - 450 2 -
450 1 - 450 1 -
450 5 - 450 5 -
450 6 - 451 6 -
450 7 - 450 7 -
451 8 - 451 8 -
450 9 - 450 9 -
450 10 - 451 10 -
Atmospheric pressure: 1009.8 - 1014.3 hPa

2.3 Lowest temperature at which an ignition occured:

Main test series Lowest temperature of an ignition Highest temperatures without an ignition Atmospheric Pressure
1 451 °C 448°C 1009.8 - 1014.3 hPa
2 452°C 450°C 1013.4 hPa
3 453°C 451°C 1013.4 hPa

Based on the result of the main study the lowest auto-ignition temperature was 451°C

Regulation EC No. 440/2008 and DIN 51794: The auto-ignition temperature rounded down to the nearest multiple of 5°C was determined as 450°C.

3. Final results: According to the test results, the test item belongs to temperature class T1.

Conclusions:
The test item has an auto-ignition temperature of 450°C
Executive summary:

The test has been performed according to EC No. 440/2008 Method A.15. Auto-Ignition Temperature (Liquids and Gases) and DIN 51794 (2003): Determination of Ignition Temperature without significant deviations.

The test determines the lowest temperature at which a gas/air- or vapour/air-mixture of the flammable test item ignites in contact with a hot surface. For that purpose, the amount of the test item and the temperature of the hot surface are varied. In this way, the lowest temperature rounded down to the nearest multiple of 5 °C is determined at which the test item ignites.

The test item has an auto-ignition temperature of 450°C.

According to DIN EN 13463 -1 the test item has to be assigned to temperature class T1.

Description of key information

Auto-ignition temperature is 450°C at atmospheric pressure as determined according to DIN EN 14522 (2005).

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
450 °C

Additional information

The test has been performed according to EC No. 440/2008 Method A.15. Auto-Ignition Temperature (Liquids and Gases), DIN 51794 (2003): Determination of Ignition Temperature and DIN EN 14522 (2005): Determination of Ignition Temperature without significant deviations.

The test determines the lowest temperature at which a gas/air- or vapour/air-mixture of the flammable test item ignites in contact with a hot surface. For that purpose, the amount of the test item and the temperature of the hot surface are varied. In this way, the lowest temperature rounded down to the nearest multiple of 5 °C is determined at which the test item ignites.

The test item has an auto-ignition temperature of 450°C.

According to DIN EN 13463 -1 the test item has to be assigned to temperature class T1.