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Reference
Endpoint:
auto-ignition temperature (liquids)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2013-07-29 to 2013-08-07
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study with acceptable restrictions
Remarks:
The study was conducted in accordance with a relevant test method and in compliance with a known quality system (ISO 9001:2008)
Qualifier:
according to guideline
Guideline:
EU Method A.15 (Auto-Ignition Temperature (Liquids and Gases))
Deviations:
no
Qualifier:
according to guideline
Guideline:
DIN EN 14522, Method S (Determination of the auto ignition temperature of gases and vapours)
Version / remarks:
DIN EN 14522
Deviations:
no
GLP compliance:
no
Other quality assurance:
other: ISO 9001:2008
Key result
Auto-ignition temperature:
350 °C
Atm. press.:
966 - 970 hPa
Remarks on result:
other:

Results:

Table 1: preliminary result

No

Test temperature

[°C]

Number of

sample

[drops]

Time lags

[s]

Result concerning

ignition

[negative(-) /

positive(+)]

Atmospheric

pressure [hPa]

1

272.5

5

300

-

966

2

296.2

5

300

-

3

320.2

5

300

-

4

346.0

5

300

-

5

368.8

5

29

+

Lowest test temperature

369°C

 

 

Table 2: Test series 1

No

Test temperature

[°C]

Number of

sample

[drops]

Time lags

[s]

Result concerning

ignition

[negative(-) /

positive(+)]

Atmospheric

pressure [hPa]

1

370.0

10

25

+

968

2

365.0

10

300

-

3

365.0

6

34

+

4

360.0

6

300

-

5

360.0

2

300

-

6

360.0

10

300

-

7

360.0

14

42

+

8

355.0

14

300

-

970

9

355.0

10

300

-

10

355.0

6

300

-

11

355.0

2

300

-

12

355.0

18

29

+

13

350.0

18

300

-

14

350.0

14

300

-

15

350.0

10

300

-

16

350.0

6

300

-

17

350.0

2

300

-

18

353.0

18

300

-

19

353.0

14

300

-

20

353.0

10

300

-

21

352.0

6

300

-

Lowest test temperature

355°C

 

 

 

Table 3: Test series 2

No

Test temperature

[°C]

Number of

sample

[drops]

Time lags

[s]

Result concerning

ignition

[negative(-) /

positive(+)]

Atmospheric

pressure [hPa]

1

360.0

18

Stop

 

970

2

360.0

2

300

-

3

360.0

14

300

-

4

360.0

18

300

-

5

365.0

10

300

-

6

365.0

6

77

+

7

360.0

6

300

-

8

360.0

2

300

-

9

360.0

10

300

-

10

360.0

14

300

-

11

360.0

18

300

-

12

363.0

6

32

+

13

361.0

6

300

-

14

361.0

2

300

-

15

361.0

10

300

-

16

361.0

14

300

-

17

361.0

18

300

-

Lowest test temperature

363°C

 

 

Table 4: Test series 3

No

Test temperature

[°C]

Number of

sample

[drops]

Time lags

[s]

Result concerning

ignition

[negative(-) /

positive(+)]

Atmospheric

pressure [hPa]

1

370.0

6

300

-

970

2

370.0

2

21

+

3

365.0

2

300

-

4

365.0

6

300

-

5

365.0

10

300

-

968

6

365.0

14

16

+

7

360.0

14

300

-

8

360.0

10

300

-

9

360.0

6

300

-

10

360.0

2

300

-

11

360.0

18

300

-

12

363.0

14

300

-

13

363.0

10

300

-

14

363.0

6

300

-

15

363.0

2

300

-

16

363.0

18

55

+

966

17

361.0

18

26

+

18

359.0

18

300

-

19

359.0

14

300

-

20

359.0

10

300

-

21

359.0

6

300

-

22

359.0

2

300

-

Lowest test temperature

361°C

 

 

Table 5: summary of result

Parameter

Value

Lowest value of test series 1:

355°C

Lowest value of test series 2:

363°C

Lowest value of test series 3:

361°C

Lowest value of all test series:

355°C

Absolute deviation of the lowest value (1.5%):

5.3°C

Auto-ignition temperature:

350°C

 

According to DIN EN 14522 the lowest value of all test series (355°C) was reduced by the deviation value based on the precision of the method (rel. 1.5% = 5.3°C). The resulting value was rounded to the next integral number (350°C).

Conclusions:
An auto-ignition temperature value of 350°C at 966-970 hPa was determined for the substance using a relevant test method and in compliance with a known quality system. The result is considered to be reliable.

Description of key information

Auto-ignition temperature: 350°C at 966-970 hPa (DIN EN 14522)

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
350 °C

Additional information

An auto-ignition temperature value of 350°C at 966 - 970 hPa was determined for the substance in accordance with DIN EN 14522 Test Method and in compliance with a known quality system (ISO 9001:2008). The result is considered to be reliable.