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Reference
Endpoint:
auto-ignition temperature (liquids)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2015-11-24 to 2015-12-02
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:
DIN 51794 (Testing of mineral oil hydrocarbons - Determination of ignition temperature)
Version / remarks:
2003
Deviations:
no
GLP compliance:
yes (incl. certificate)
Key result
Auto-ignition temperature:
220 °C
Atm. press.:
1 008 - 1 009 mBar

Preliminary test

 

Test No.

 

 

Sample Volume

[µl]

Barometric pressure

[mbar]

 

Temperature

[°C]

Ignition delay[s]

Test result

 

1

150

1009

300

0

Ignition

2

150

1009

280

2

Ignition

3

150

1009

260

3

Ignition

4

150

1009

240

15

Ignition

5

150

1009

220

-

No Ignition

 

Result value 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

1009

235

26

Ignition

2

150

1009

230

34

Ignition

3

150

1009

225

-

No Ignition

4

450

1009

225

-

No Ignition

5

450

1009

228

47

Ignition

6

450

1009

226

62

Ignition

7

450

1009

224

65

Ignition

8

450

1009

222

-

No Ignition

9

300

1009

222

-

No Ignition

10

100

1009

222

-

No Ignition

 

Results first main test series: ignition: 224°C, no ignition: 222°C

Second main test series

 

Test No.

 

 

Sample Volume

[µl]

Barometric pressure

[mbar]

 

Temperature

[°C]

Ignition delay[s]

Test result

 

1

450

1008

224

66

Ignition

2

450

1008

222

-

No Ignition

3

350

1008

222

-

No Ignition

4

250

1008

222

-

No Ignition

5

150

1008

222

-

No Ignition

6

60

1008

222

-

No Ignition

7

400

1008

222

-

No Ignition

8

300

1008

222

-

No Ignition

 

Results second main test: ignition: 224°C, no ignition: 222°C

 

 

Retest

 

Test No.

 

 

Sample Volume

[µl]

Barometric pressure

[mbar]

 

Temperature

[°C]

Ignition delay[s]

Test result

 

1

450

1008

224

65

Ignition

2

450

1008

222

-

No Ignition

3

400

1008

222

-

No Ignition

4

300

1008

222

-

No Ignition

5

200

1008

222

-

No Ignition

6

100

1008

222

-

No Ignition

7

250

1008

222

-

No Ignition

8

350

1008

222

-

No Ignition

9

150

1008

222

-

No Ignition

10

60

1008

222

-

No Ignition

 

Results restest: ignition: 224°C, no ignition: 222°C

 

Evaluation

 

Lowest value from pretest:

240°C

Lowest value for first main test:

224°C

Lowest value for second main test:

224°C

Lowest value for retest:

224°C

 

Lowest value of all main test/retest series: 224°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 220°C at 1008-1009 mbar was determined for the substance using the relevant test method and in compliance with GLP. The result is considered to be reliable.

Description of key information

Auto-ignition temperature: 220°C at 1008 -1009 mBar (DIN 51794)

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
220 °C

Additional information

An auto-ignition temperature value of 220°C at 1008-1009 mBar was determined for the substance using a relevant test method according to DIN 51794 and in compliance with GLP. The result is considered to be reliable and is selected as key study.

In available secondary sources to which no reliable could be assigned, auto-ignition temperature values of 220°C and 225°C were reported for the substance.