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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:
2015-11-20 to 2015-11-25
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
DIN 51794 (Testing of mineral oil hydrocarbons - Determination of ignition temperature)
Version / remarks:
2003
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.15 (Auto-Ignition Temperature (Liquids and Gases))
Version / remarks:
30 May 2008
Deviations:
no
GLP compliance:
yes (incl. certificate)
Key result
Auto-ignition temperature:
230 °C
Atm. press.:
ca. 998 - ca. 1 011 hPa

Results:

The measurement results are shown in the following tables.

Preliminary test:

Test No.

Sample volume [µL]

Barometric pressure [mBar]

Temperature [°C]

Ignition delay [s]

Test result

1

150

998

300

0

ignition

2

150

998

280

5

ignition

3

150

998

260

8

ignition

4

150

998

240

22

ignition

5

150

998

220

-

no ignition

 

Results from preliminary test series: ignition: 240°C; no ignition: 220°C

Main test:

First main test series

Test No.

Sample volume [µL]

Barometric pressure [mBar]

Temperature [°C]

Ignition delay [s]

Test result

1

150

998

235

35

ignition

2

150

998

230

-

no ignition

3

450

998

230

-

no ignition

4

450

998

233

40

ignition

5

450

998

231

-

no ignition

6

350

998

231

-

no ignition

7

250

998

231

-

no ignition

8

150

998

231

-

no ignition

 

Results from first main test series: ignition: 233°C; no ignition: 231°C

 

Second main test series

Test No.

Sample volume [µL]

Barometric pressure [mBar]

Temperature [°C]

Ignition delay [s]

Test result

1

450

1011

233

40

ignition

2

450

1011

231

-

no ignition

3

400

1011

231

-

no ignition

4

300

1011

231

-

no ignition

5

200

1011

231

-

no ignition

6

100

1011

231

-

no ignition

7

60

1011

231

-

no ignition

 

Results from second main test series: ignition: 233°C; no ignition: 231°C

Retest

Test No.

Sample volume [µL]

Barometric pressure [mBar]

Temperature [°C]

Ignition delay [s]

Test result

1

450

1011

233

43

ignition

2

450

1011

231

-

no ignition

3

350

1011

231

-

no ignition

4

250

1011

231

-

no ignition

5

150

1011

231

-

no ignition

6

60

1011

231

-

no ignition

7

100

1011

231

-

no ignition

8

200

1011

231

-

no ignition

9

300

1011

231

-

no ignition

10

400

1011

231

-

no ignition

 

Results from retest: ignition: 233°C; no ignition: 231°C

Evaluation:

Lowest value from pretest [°C]

240

Lowest value from first main test [°C]

233

Lowest value from second main test [°C]

233

Lowest value from first retest [°C]

233

 

Lowest value of all main test/retest series = 233°C

Correction of the temperature according to the last DKD calibration (06/2015) of the temperature measurement chain (thermocouple + monitor) is already considered (value of -0.5°C).

 

Conclusions:
An auto-ignition temperature value of 230°C at 998-1011 hPa was determined for the substance using a relevant test method and in compliance with GLP. The result is considered to be reliable.

Description of key information

Auto-ignition temperature: 230°C at 998-1011 hPa (DIN 51794)

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
230 °C

Additional information

A measured auto-ignition temperature value of 230°C at 998-1011 hPa was determined for the substance using a relevant test method and in compliance with GLP. The result is considered to be reliable and is selected as key study.

In a secondary source to which reliability could not be assigned, an auto-ignition temperature value of 225°C was reported for the substance.