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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:
Study starting date: 2017-09-14; Experimental starting date: 2017-10-12; Experimental completion date: 2017-10-13
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
EU Method A.15 (Auto-Ignition Temperature (Liquids and Gases))
GLP compliance:
yes (incl. certificate)
Key result
Auto-ignition temperature:
430 °C
Atm. press.:
1 006.5 hPa
Remarks on result:
preliminary test
Key result
Auto-ignition temperature:
419 °C
Atm. press.:
1 013.3 - 1 014.5 hPa

An approximate value of the ignition temperature of the test item was first determined by a preliminary test. Table 1 gives the result of the preliminary test. An ignition is denoted as “+” and no ignition is denoted as “-“. 5 drops were put into the Erlenmeyer flask at each temperature.

Table1:   Results of the preliminary test

 

Preliminary test

Temperature / °C

202

251

301

352

401

451

441

430

420

Ignition / +/-

-

-

-

-

-

+

+

+

-

Atmospheric pressure / hPa: 1006.5 hPa

In the preliminary test, the lowest temperature at which an ignition occurred was 430 °C.

The lowest temperatures at which an ignition occurred in the main test are given in Table2.

Table2:    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

427.7

424.8

1009.5 – 1009.8

2

419.4

415.8

1013.4 – 1014.3

3

421.7

418.9

1013.3 – 1014.5

Based on results of the main test series, the lowest auto-ignition temperature was 419 °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 415 °C.

For information:

DIN EN 14522:The auto-ignition temperature reduced by 1.5 % and rounded to the nearest integer temperature was determined as 413 °C.

Conclusions:
The test item has an auto-ignition temperature of 415 °C according to the Regulation EC No. 440/2008 Method A.15. Auto-Ignition Temperature (Liquids and Gases) and DIN 51794 (2003): Determination of Ignition Temperature.
Executive summary:

The test item has an auto-ignition temperature of 415 °C according to the Regulation EC No. 440/2008 Method A.15. Auto-Ignition Temperature (Liquids and Gases) and DIN 51794 (2003): Determination of Ignition Temperature.

It is noted here that according to ECHA guidance – Guidance on information requirements and chemical safety assessment; chapter R.7A: Endpoint specific guidance, October 2015 – 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 in considering risks associated with processing the substance.

According to DIN EN 13463-1 the test item has to be assigned to temperature class T2 (see the following Table 3).

Table3:    Temperature classes

Temperature class

Maximum surface temperature / minimum auto ignition temperature [°C]

T1

450

T2

300

T3

200

T4

135

T5

100

T6

85

This study was GLP compliant and followedRegulation EC No. 440/2008 Method A.15. The study was given a reliability rating of 1 (reliable without restrictions).


Description of key information

The test item has an auto-ignition temperature of 415 °C according to the Regulation EC No. 440/2008 Method A.15. Auto-Ignition Temperature (Liquids and Gases) and DIN 51794 (2003): Determination of Ignition Temperature.

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
415 °C

Additional information

This study was GLP compliant and followed Regulation EC No. 440/2008 Method A.15. The study was given a reliability rating of 1 (reliable without restrictions).