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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:
2009-11-06 to 2009-11-11
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study with acceptable restrictions
Remarks:
In compliance with a relevant quality system (ISO 9001:2008)
Qualifier:
according to guideline
Guideline:
DIN EN 14522, Method S (Determination of the auto ignition temperature of gases and vapours)
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method A.15 (Auto-Ignition Temperature (Liquids and Gases))
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Key result
Auto-ignition temperature:
222 °C
Atm. press.:
ca. 960.8 - ca. 962.6 hPa

Preliminary Test

Test No.

Test temperature [°C]

Number of sample [drops]

Atmospheric pressure [hPa]

Time lags [s]

Result concerning ignition [negative (-)/ positive (+)]

1

210

5

962.4

300

-

2

228

5

962.4

300

-

3

247

5

962.4

10

+

Lowest temperature

247°C

 

Test series 1

Test No.

Test temperature [°C]

Number of sample [drops]

Atmospheric pressure [hPa]

Time lags [s]

Result concerning ignition [negative (-)/ positive (+)]

1

242

5

962.4

10

+

2

237

5

962.4

300

-

3

237

1

962.4

300

-

4

237

9

962.4

10

+

5

232

9

962.4

10

+

6

227

9

962.4

300

-

7

227

5

962.4

300

-

8

227

1

962.4

300

-

9

227

13

962.4

300

-

10

227

17

962.4

300

-

11

230

9

962.4

10

+

12

228

9

962.4

10

+

13

226

9

962.4

300

-

14

226

5

962.4

300

-

15

226

1

960.8

300

-

16

226

13

960.8

300

-

17

226

17

960.8

300

-

Lowest temperature

228°C

 

Test series 2

Test No.

Test temperature [°C]

Number of sample [drops]

Atmospheric pressure [hPa]

Time lags [s]

Result concerning ignition [negative (-)/ positive (+)]

1

247

5

960.8

10

+

2

242

5

960.8

300

-

3

242

1

960.8

300

-

4

242

9

960.8

10

+

5

237

9

960.8

10

+

6

232

9

960.8

300

-

7

232

5

960.8

300

-

8

232

1

960.8

300

-

9

232

13

961.4

10

+

10

227

13

961.4

10

+

11

222

13

961.4

300

-

12

222

10

961.4

300

-

13

222

6

961.4

300

-

14

222

2

961.4

300

-

15

222

14

961.4

300

-

16

222

18

961.4

300

-

17

225

6

961.4

10

+

18

223

6

961.4

300

-

19

223

2

961.4

300

-

20

223

10

961.4

300

-

21

223

14

961.4

300

-

22

223

18

961.4

300

-

Lowest temperature

225°C

 

Test series 3

Test No.

Test temperature [°C]

Number of sample [drops]

Atmospheric pressure [hPa]

Time lags [s]

Result concerning ignition [negative (-)/ positive (+)]

1

232

18

962.6

10

+

2

227

18

962.6

10

+

3

222

18

962.6

300

-

4

222

14

962.6

300

-

5

222

10

962.6

300

-

6

222

6

962.6

300

-

7

222

2

962.6

300

-

8

225

18

962.6

300

-

9

225

14

962.6

300

-

10

225

10

962.6

300

-

11

225

6

962.6

300

-

12

225

2

962.6

300

-

Lowest temperature

227°C

 

Summary

Parameter

Value [°C]

Lowest value of test series 1:

228

Lowest value of test series 2:

225

Lowest value of test series 3:

227

Lowest value of all test series:

225

Absolute deviation of the lowest value [1.5%]

3.4

Auto-ignition temperature

222

 

Conclusions:
An auto-ignition temperature value of 222°C at 960.8 to 962.8 hPa was determined for the substance in a reliable study conducted according to an appropriate test protocol and in compliance with GLP.

Description of key information

Auto-ignition temperature: 222°C at 960.8 to 962.6 hPa  (EU Method A.15)

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
222 °C

Additional information

An auto-ignition temperature value of 222°C at 960.8 - 962.6 hPa was determined for the submission substance in a reliable study conducted according to EU Method A.15 (DIN EN 14522 Method S) and in compliance with a known quality system (ISO 9001:2008). The result is considered as reliable and suitable for key study. The key study is supported by another measured auto-ignition temperature value of 229°C at 952-972 hPa using a relevant test method.

Auto-ignition temperature values of 230°C at 1013 hPa (Wacker 2007), 225°C at 1013 hPa (Evonik 2007) and 235°C at 1013 hPa (Reuther 1953) were reported for the substance in secondary literature sources. The original references were not available for review and no further information is available.