Diethoxy(dimethyl)silane

Auto flammability

Link to relevant study record(s)

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

Guideline:

EU Method A.15 (Auto-Ignition Temperature (Liquids and Gases))

Qualifier:

according to guideline

Guideline:

other: DIN 51794 (2003)

GLP compliance:

yes (incl. QA statement)

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.