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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
Guideline:
EU Method A.15 (Auto-Ignition Temperature (Liquids and Gases))
Version / remarks:
30 May 2008
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:
yes (incl. QA statement)
Key result
Auto-ignition temperature:
205 °C
Atm. press.:
ca. 998 - ca. 1 011 mBar

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

0

Ignition

3

150

998

260

0

Ignition

4

150

998

240

3

Ignition

5

150

998

220

10

Ignition

6

150

998

200

-

No Ignition

 

Result value from preliminary test series: ignition: 220°C, no ignition: 200°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

215

20

Ignition

2

150

998

210

-

No Ignition

3

450

998

210

30

Ignition

4

450

998

205

-

No Ignition

5

450

998

208

30

Ignition

6

450

998

206

-

No Ignition

7

350

998

206

-

No Ignition

8

250

998

206

-

No Ignition

 

Results first main test series: ignition: 208°C, no ignition: 206°C

Second main test series

 

Test No.

 

 

Sample Volume

[µL]

Barometric pressure

[mbar]

 

Temperature

[°C]

Ignition delay[s]

Test result

 

1

450

1011

208

32

Ignition

2

450

1011

206

48

Ignition

3

450

1011

204

-

No Ignition

4

300

1011

204

-

No Ignition

5

200

1011

204

-

No Ignition

6

100

1011

204

-

No Ignition

7

60

1011

204

-

No Ignition

8

400

1011

204

-

No Ignition

 

Results second main test: ignition: 206°C, no ignition: 204°C

 

 

Retest

 

Test No.

 

 

Sample Volume

[µL]

Barometric pressure

[mbar]

 

Temperature

[°C]

Ignition delay[s]

Test result

 

1

450

1011

206

47

Ignition

2

450

1011

204

-

No Ignition

3

350

1011

204

-

No Ignition

4

250

1011

204

-

No Ignition

5

150

1011

204

-

No Ignition

6

60

1011

204

-

No Ignition

7

100

1011

204

-

No Ignition

8

200

1011

204

-

No Ignition

9

300

1011

204

-

No Ignition

 

Results restest: ignition: 206°C, no ignition: 204°C

 

Evaluation

 

Lowest value from pretest:

220°C

Lowest value for first main test:

208°C

Lowest value for second main test:

206°C

Lowest value for retest:

206°C

 

Lowest value of all main test/retest series: 206°C

 

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

Conclusions:
An auto-ignition tempereature of 205°C at 998-1011 mbar 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:  205°C at 1013 hPa (DIN 51794)

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
205 °C

Additional information

An auto-ignition temperature value of 205°C at 1013 hPa was determined for the substance using a relevant test method and in compliance with GLP. The result is considered to be reliable.

In available secondary source to which reliability could not be assigned, auto-ignition temperature value of 200°C was reported for the substance.