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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:
27-Nov-2015 to 09-Dec-2015
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))
Qualifier:
according to
Guideline:
other: DIN 51794 (2003): Determination of Ignition Temperature
Qualifier:
according to
Guideline:
other: DIN EN 14522 (2005): Determination of the Ignition Temperature of gases and liquids
GLP compliance:
no
Key result
Auto-ignition temperature:
230 °C
Atm. press.:
> 1 023.2 - < 1 024.3 hPa

Results

Preliminary test

An approximate value of the ignition temperature of the test item was first determined in a preliminary test. Results are given in the table below. An “ignition” is indicated by + and “no ignition” by -. Five drops were added into the Erlenmeyer flask at each temperature.

 

Results of the preliminary test

Temperature / °C

Ignition + / -

240

+

219

-

255

-

233

-

Atmospheric pressure: 1008.4 – 1015.0 hPa

 

In the preliminary test, the lowest temperature at which an ignition occurred was 240 °C.

 

Main test

The results of the three test series are given in the following tables. An “ignition” is indicated by + and “no ignition” by -.

 

Results of first and second main test series using the semi automated apparatus ZT1

1st main test series

2nd main test series

Temperature / °C

Droplets

Ignition

Temperature / °C

Droplets

Ignition

235

9

+

234

9

+

234

9

-

232

9

-

234

8

-

232

8

-

234

7

-

232

7

-

234

6

-

231

6

-

234

5

-

231

5

-

234

4

-

231

4

-

234

3

-

231

3

-

234

2

-

231

2

-

234

1

-

230

1

-

234

10

-

231

10

-

Atmospheric pressure = 1017.0 hPa

   Atmospheric pressure = 1017.0 hPa

 

Results of third main test series using the fully automated apparatus ZT2

3rd Main test series

Temperature / °C

Drops

Ignition / +/-

235

10

+

232

10

+

230

10

-

230

9

-

229

8

-

231

7

-

230

6

-

229

5

-

230

4

-

231

3

-

231

2

-

229

1

-

Atmospheric pressure: 1023.2 – 1024.3 hPa 

 

The lowest temperatures at which an ignition occurred in the main tests are given in the following table.

 

Results of third test series

Main test series

Lowest temperatures of an ignition

Highest temperatures without an ignition

Atmospheric Pressure

1

235 °C

234 °C

1017.0 hPa

2

234 °C

232 °C

1017.0 hPa

3

232 °C

231 °C

1023.2 - 1024.3 hPa

 

Based on the results of the main test series, the lowest auto-ignition temperature was 232 °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 230 °C.

 

Final results

The test item has an auto-ignition temperature of 230 °C according to Regulation EC No. 440/2008 Method A.15 Auto-Ignition Temperature (Liquids and Gases) and DIN 51794 (2003): Determination of Ignition Temperature.

Conclusions:
An auto-ignition temperature value of 230 °C (at 1023 to 1024 hPa) was determined for the test substance according to E.U. Method A.15.

Description of key information

Auto-ignition temperature: 230 °C at 1023 to 1024 hPa (EU Method A.15)

Key value for chemical safety assessment

Additional information