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Physical & Chemical properties

Auto flammability

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Reference
Endpoint:
auto-ignition temperature (liquids)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
12 May 2015 to 12 Jan 2016
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
EU Method A.15 (Auto-Ignition Temperature (Liquids and Gases))
Qualifier:
according to
Guideline:
other: DIN 51794 (2003)
GLP compliance:
yes (incl. certificate)
Remarks:
Gute Laborpraxis/Good Laboratory Practice GLP-Bescheiningung/Statement of GLP Compliance (gemäß/according to § 19b Abs. 1 Chemikaliengesetz)
Auto-ignition temperature:
240 °C
Atm. press.:
1 011 hPa

Results

Preliminary test

test no.

sample volume

barometric pressure

T (°C)

ignition delay (s)

test result

1

150

1014

300

3

ignition

2

150

1014

280

12

ignition

3

150

1014

260

15

ignition

4

150

1014

240

-

no ignition

5

150

1014

250

-

no ignition

6

150

1014

254

30

ignition

7

150

1014

252

-

no ignition

 

Result value from preliminary test series: ignition at 254 °C, no ignition at 252 °C.

 

Main test

First main test series

test no.

sample volume

barometric pressure

T (°C)

ignition delay (s)

test result

1

400

1014

252

30

ignition

2

400

1014

250

30

ignition

3

400

1014

248

40

ignition

4

400

1014

246

45

ignition

5

400

1014

244

55

ignition

6

400

1014

242

-

no ignition

 

Result value from first main test series: ignition at 244 °C, no ignition at 242 °C.

 

Second main test series

test no.

sample volume

barometric pressure

T (°C)

ignition delay (s)

test result

1

400

1013

244

55

ignition

2

400

1013

242

-

no ignition

3

300

1013

242            

-

no ignition

4

200

1013

242

-

no ignition

5

100

1013

242

-

no ignition

6

50

1013

242

-

no ignition

7

450

1013

242

-

no ignition

 

Result value from first main test series: ignition at 244 °C, no ignition at 242 °C.

 

Reteset

test no.

sample volume

barometric pressure

T (°C)

ignition delay (s)

test result

1

400

1011

244

55

ignition

2

400

1011

242

-

no ignition

3

350

1011

242            

-

no ignition

4

250

1011

242

-

no ignition

5

150

1011

242

-

no ignition

6

50

1011

242

-

no ignition

7

450

1011

242

-

no ignition

8

300

1011

242

-

no ignition

9

200

1011

242

-

no ignition

10

100

1011

242

-

no ignition

 

Result value from first main test series: ignition at 244 °C, no ignition at 242 °C.

Correction of the temperature according to the last DKD calibration (06/2014) of the temperature measurement chain (thermocouple + monitor) is already considered (value of -0.5 °C).

Evaluation

lowest value from pretest

254 °C

lowest value for the first main test

244 °C

lowest value for the second main test

244 °C

lowest value for retest

244 °C

 

Lowest value of the main test/retest series: 244 °C

Correction of the temperature according to the last DKD calibration (06/2014) of the temperature measurement chain (thermocouple + monitor) is already considered (value of -0.5 °C).

 

Concluding result

The auto-ignition temperature is 240 °C (according to the assessment criteria and definition in the Council Regulation (EC) No 440/2008, test method A.15.

Conclusions:
An auto-ignition temperature of 240°C at 1011 hPa was determined in a reliable study conducted according to an appropriate test protocol, and in compliance with GLP.

Description of key information

Diethoxy(dimethyl)silane: 240°C at 1011 hPa

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
240 °C

Additional information

An auto-ignition temperature of 240 °C at 1011 hPa was obtained for the parent substance according to EU test method A.15.