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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:
2015-03-12 to 2015-03-26
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study with acceptable restrictions
Remarks:
The study was conducted according to an appropriate test method and in compliance with known quality system (ISO 9001:2008)
Qualifier:
according to
Guideline:
DIN EN 14522, Method S (Determination of the auto ignition temperature of gases and vapours)
Deviations:
no
GLP compliance:
no
Other quality assurance:
other: ISO 9001:2008
Key result
Auto-ignition temperature:
349 °C
Atm. press.:
ca. 959 - ca. 971 hPa

Results:

Table 1: Preliminary test:

No.

Test temperature

[°C]

Number of

sample

[drops]

Result concerning

ignition

[negative(-) / positive(+)]

Atmospheric pressure

[hPa]

1

322.5

 5

-

976

2

347.2

 5

-

3

369.8

 5

-

4

393.8

 5

-

5

401.6

 5

+

Lowest temperature

401.6°C

 

 

Table 2: Test series 1

No.

Test temperature

[°C]

Number of

sample

[drops]

Result concerning

ignition

[negative(-) / positive(+)]

Atmospheric pressure

[hPa]

1

397.0

5

+

970

-

2

392.0

5

+

3

387.0

5

+

4

382.0

5

-

5

382.0

1

-

6

382.0

9

-

7

382.0

13

+

8

377.0

13

-

9

377.0

9

-

10

377.0

5

-

11

377.0

1

-

12

377.0

17

+

13

372.0

10

+

14

367.0

10

+

15

362.0

10

+

16

357.0

10

-

17

357.0

6

-

18

357.0

2

-

19

357.0

14

+

20

352.0

14

-

21

352.0

10

-

22

352.0

6

-

23

352.0

2

-

24

352.0

18

-

25

355.0

14

+

26

353.0

14

-

27

353.0

10

-

28

353.0

6

-

29

353.0

2

-

30

353.0

18

-

Lowest temperature

355°C

 

 

Table 3: Test series 2

No.

Test temperature

[°C]

Number of

sample

[drops]

Result concerning

ignition

[negative(-) / positive(+)]

Atmospheric pressure

[hPa]

1

372.0

10

+

971

2

367.0

10

-

3

367.0

6

+

4

362.0

6

-

5

362.0

2

-

6

362.0

10

+

7

357.0

10

-

8

357.0

6

-

9

357.0

2

-

10

357.0

14

-

11

357.0

18

-

12

360.0

10

-

13

360.0

6

-

14

360.0

2

-

15

360.0

14

-

16

360.0

18

-

Lowest temperature

362°C

 

 

Table 4: Test series 3

No.

Test temperature

[°C]

Number of

sample

[drops]

Result concerning

ignition

[negative(-) / positive(+)]

Atmospheric pressure

[hPa]

1

367.0

10

-

971

2

367.0

6

-

3

367.0

2

-

4

380.0

10

+

5

375.0

10

-

6

375.0

+

+

7

370.0

6

+

8

365.0

6

-

9

365.0

2

-

10

365.0

10

-

11

365.0

14

+

12

360.0

14

-

13

360.0

10

-

14

360.0

6

-

15

360.0

2

+

16

355.0

2

-

966

17

360.0

10

+

18

355.0

10

-

19

355.0

6

-

20

355.0

2

-

21

355.0

14

-

22

355.0

18

-

23

358.0

10

-

24

358.0

6

-

25

358.0

2

-

26

358.0

14

+

27

356.0

14

+

28

354.0

14

-

29

354.0

10

-

30

354.0

6

-

31

354.0

2

-

32

354.0

18

+

33

352.0

18

-

34

352.0

14

-

35

352.0

10

-

959

36

352.0

6

-

37

352.0

2

-

Lowest temperature

354°C

 

 

Table 5: Test series 4

No.

Test temperature

[°C]

Number of

sample

[drops]

Result concerning

ignition

[negative(-) / positive(+)]

Atmospheric pressure

[hPa]

1

365.0

18

-

959

2

380.0

10

+

3

375.0

10

+

4

370.0

10

+

5

365.0

10

+

6

360.0

10

-

7

360.0

6

-

8

360.0

2

-

9

360.0

14

-

10

360.0

18

-

11

363.0

10

-

12

363.0

6

-

13

363.0

2

-

14

363.0

14

-

15

363.0

18

-

Lowest temperature

365°C

 

 

Table 6: Summary of result

Parameter

Value (°C)

Lowest value of test series 1:

355

Lowest value of test series 2:

362

Lowest value of test series 3:

354

Lowest value of test series 4:

365

Lowest value of all test series :

354

Absolute deviation of the lowest value (1.5%)

5.3

Auto-ignition temperature

349

 

Conclusions:
An auto-ignition temperature of 349°C at 959 to 971 hPa has been determined for the substance using an appropriate test method. The result is considered reliable.

Description of key information

Auto-ignition temperature: 349°C at 959 - 971 hPa (DIN 14522, Method S)

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
349 °C

Additional information

Two reliable auto-ignition temperature studies are available for trichloro(propyl)silane. A measured auto-ignition temperature value of 349°C at 959 to 971 hPa was determined for the substance in accordance with DIN EN 14522, Method S 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 measured auto-ignition temperature value of 360°C at 1013 hPa which was determined in accordance with ASTM E659 -78 test method but not in compliance with GLP.

In available secondary sources to which reliability could not be assigned, auto-ignition temperature value of 355°C at 1013 hPa was reported for the substance.