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Reference
Endpoint:
auto-ignition temperature (liquids)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2015-07-30 to 2015-08-07
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study with acceptable restrictions
Remarks:
The study was conducted according to a relevant test method and in accordance with a recognised quality system
Qualifier:
according to guideline
Guideline:
DIN EN 14522, Method S (Determination of the auto ignition temperature of gases and vapours)
GLP compliance:
no
Other quality assurance:
other: ISO 9001:2008
Key result
Auto-ignition temperature:
251 °C
Atm. press.:
ca. 964 - ca. 967 hPa
Remarks on result:
other:

The auto-ignition temperature results are shown below:

Table 1: Preliminary test

No.

Test temperature [°C]

Number of sample [drops]

Result concerning

ignition

[negative(-) / positive(+)]

Atmospheric pressure [hPa]

1

215.6

5

-

964

2

234.3

5

-

3

256.3

5

-

4

279.4

5

-

5

301.9

5

-

6

328.2

5

-

7

330.9

5

+

Lowest test temperature

330.9°C

 

Table 2: Test series 1

No.

Test temperature [°C]

Number of sample [drops]

Result concerning

ignition

[negative(-) / positive(+)]

Atmospheric pressure [hPa]

1

285.0

10

+

964

2

280.0

10

+

3

275.0

10

+

4

270.0

10

+

5

265.0

10

+

6

260.0

10

+

7

255.0

10

-

8

255.0

6

-

9

255.0

2

-

10

255.0

14

-

11

255.0

18

-

12

258.0

10

-

966

13

258.0

6

-

14

258.0

2

-

15

258.0

14

+

16

256.0

14

-

17

256.0

10

-

18

256.0

6

-

19

256.0

2

-

20

256.0

18

-

Lowest test temperature

258°C

 

Table 3: Test series 2

No.

Test temperature [°C]

Number of sample [drops]

Result concerning

ignition

[negative(-) / positive(+)]

Atmospheric pressure [hPa]

1

265.0

14

+

967

2

260.0

14

-

3

260.0

10

+

4

255.0

10

-

5

255.0

6

-

6

255.0

2

-

7

255.0

14

-

8

255.0

18

-

9

258.0

10

-

10

258.0

6

-

11

258.0

2

-

12

258.0

14

-

13

258.0

18

-

14

256.0

18

-

15

256.0

14

-

16

256.0

10

-

17

256.0

6

-

18

256.0

2

-

Lowest test temperature

258°C

 

Table 4: Test series 3

No.

Test temperature [°C]

Number of sample [drops]

Result concerning

ignition

[negative(-) / positive(+)]

Atmospheric pressure [hPa]

1

265.0

18

+

966

2

260.0

18

+

3

255.0

18

-

4

255.0

14

-

5

255.0

10

+

6

250.0

10

-

7

250.0

6

-

8

250.0

2

-

9

250.0

14

-

10

250.0

18

-

11

253.0

10

-

12

253.0

6

-

13

253.0

2

-

14

253.0

14

-

15

253.0

18

-

Lowest test temperature:

255°C

 

Table 5: summary of results

Parameter

Value

Lowest value of test series 1:

258°C

Lowest value of test series 2:

258°C

Lowest value of test series 3:

255°C

Lowest value of all test series:

255°C

Absolute deviation of the lowest value (1.5%):

3.8°C

Auto-ignition temperature:

251°C

 

According to DIN EN 14522 the lowest value of all test series (255°C) was reduced by the deviation value based on the precision of the method (rel. 1.5% = 3.8°C). The resulting value was rounded to the next integral number (251°C).

Conclusions:
An auto-ignition temperature value of 251°C at 964-967 hPa was determined for the substance using a relevant test method. The result is considered to be reliable.

Description of key information

Auto-ignition temperature: 251°C at 964-967 hPa (DIN 14522)

Key value for chemical safety assessment

Additional information

An auto-ignition temperature value of 251°C at 964 -967 hPa was determined for the substance using a relevant test method and in compliance with a known quality system (ISO 9001:2008). The result is considered to be reliable and is selected as key study. The key study is supported by another auto-ignition temperature value of 250°C which was determined for the substance using a relevant test method.