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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:
15 Apr 2013 - 19 Apr 2013
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
comparable to guideline study
Qualifier:
according to
Guideline:
EU Method A.15 (Auto-Ignition Temperature (Liquids and Gases))
Version / remarks:
(2008)
Deviations:
no
Qualifier:
according to
Guideline:
other: DIN Guide 51794: "Determining the Ignition Temperature of Petroleum Products" (2003)
Deviations:
no
Qualifier:
according to
Guideline:
other: IEC standard 79-4: "Electrical Apparatus for Explosive Gas Atmospheres, Part 4, Method of Test for Ignition Temperature" (1975)
Deviations:
no
GLP compliance:
yes
Key result
Auto-ignition temperature:
260 °C
Atm. press.:
> 1 016.22 - < 1 023.1 hPa
Remarks on result:
other: The lowest temperature at which ignition of the test substance occurred was 264°C. This temperature was rounded down to the nearest multiple of 5°C giving an auto-ignition temperature of the test substance of 260°C.

Results

Preliminary test

The estimated auto-ignition temperature was 305°C.

Main study

The results of the main study on the determination of the auto-ignition temperature of the test substance are given in the Table.

Ignition of the test substance within 5 minutes after introduction was observed with each sample volume and with each test a minimum auto-ignition temperature was obtained. The maximum deviation between the three values was < 10°C. According to the guidelines, no further testing was required.

The lowest temperature at which ignition of the test substance occurred was 264°C. This temperature was rounded down to the nearest multiple of 5°C giving an auto-ignition temperature of the test substance of 260°C.

Table: Main study – auto-ignition temperature of the test substance

Test

Volume

 

 

(µl)

Auto-ignition temperature

 

(°C)

Ignition delay

 

 

(s)

Colour of the flame

Minimum auto-ignition temperature

(°C)

1

70

296

9

Orange/Yellow

264

 

180

280

18

Orange/Yellow

 

 

300

274

33

Orange/Yellow

 

 

600

268

24

Orange/Yellow

 

 

800

264

48

Orange/Yellow

 

 

1000

274

32

Orange/Yellow

 

 

 

 

 

 

 

2

200

278

18

Orange/Yellow

270

 

500

270

26

Orange/Yellow

 

 

900

272

23

Orange/Yellow

 

 

 

 

 

 

 

3

400

276

19

Orange/Yellow

264

 

700

264

26

Orange/Yellow

 

 

950

274

25

Orange/Yellow

 

 

Conclusion

Commercially available auto-ignition temperature apparatus was used for the determination of the degree of auto-ignitability of Methyldimethoxysilane.

The test substance is auto-ignitable with an auto-ignition temperature of 260°C at 1016.2 - 1023.1 hPa.

Conclusions:
TAn auto-ignition temperature of 260 °C was determined in a reliable study conducted according to an appropriate test protocol, and in compliance with GLP.

Description of key information

Dimethoxymethylsilane: 260°C at 1016.2 - 1023.1 hPa (measured)

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
260 °C

Additional information

An auto-ignition temperature of 260°C (1016.2 - 1023.1 hPa) was determined according to EU Method A.15.