3-chloropropyltrimethoxysilane

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:

2015-07-20 to 2015-07-27

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))

Deviations:

no

Qualifier:

according to guideline

Guideline:

DIN 51794 (Testing of mineral oil hydrocarbons - Determination of ignition temperature)

Version / remarks:

2003

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Key result

Auto-ignition temperature:

235 °C

Atm. press.:

1 013 hPa

Table 1: Experimental data on silicon compounds

Temperature [°C]	Observed pressure [mmHg]	Calculated pressure [mmHg]
17.7	46.3	46.9
28.6	78.0	78.0
44.8	154.9	155.1
68.5	374.3	373.6
82.9	599.4	599.7

 

Preliminary test

Test No.	Sample volume [µL]	Barometric pressure [mBar]	Temperature [°C]	Ignition delay [s]	Test result
1	150	1002	300	2	Ignition
2	150	1002	280	3	Ignition
3	150	1002	260	4	Ignition
4	150	1002	240	7	Ignition
5	150	1002	220	-	No ignition

 

Result value from preliminary test series: ignition: 240°C, no ignition: 220°C

 

Main test

First main test series

Test No.	Sample volume [µL]	Barometric pressure [mBar]	Temperature [°C]	Ignition delay [s]	Test result
1	150	1002	225	-	No ignition
2	150	1002	230	-	No ignition
3	150	1002	235	-	No ignition
4	150	1002	237	22	Ignition
5	250	1002	235	-	No ignition
6	350	1002	235	-	No ignition

 

Results first main test series: ignition: 237°C, no ignition: 235°C

Second main test series

Test No.	Sample volume [µL]	Barometric pressure [mBar]	Temperature [°C]	Ignition delay [s]	Test result
1	150	1007	237	24	Ignition
2	150	1007	235	-	No ignition
3	450	1007	235	-	No ignition
4	400	1007	235	-	No ignition
5	300	1007	235	-	No ignition
6	200	1007	235	-	No ignition
7	100	1007	235	-	No ignition
8	50	1007	235	-	No ignition

 

Results second main test: ignition: 237°C, no ignition: 235°C

 

Retest

Test No.	Sample volume [µL]	Barometric pressure [mBar]	Temperature [°C]	Ignition delay [s]	Test result
1	150	1005	237	-	Ignition
2	150	1005	235	-	No ignition
3	250	1005	235	-	No ignition
4	350	1005	235	-	No ignition
5	450	1005	235	-	No ignition
6	400	1005	235	-	No ignition
7	300	1005	235	-	No ignition
8	200	1005	235	-	No ignition
9	100	1005	235	-	No ignition

 

Results retest: ignition: 237°C, no ignition: 235°C

Evaluation

lowest value from pretest:	240°C
lowest value for first main test:	237°C
lowest value for second main test:	237°C
lowest value for retest:	237°C

 

Lowest value of all main test/retest series: 237°C.

 

Correction of the temperature according to the last DKD calibration (10/062014) of the temperature measurement chain (thermocouple + monitor) is already considered (value of -0.5°C).

 

Concluding Result

The auto-ignition temperature is 235°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 value of 235°C at 1013 hPa was determined for the substance using a relevant test method and in compliance with GLP. The result is considered to be reliable.

Description of key information

Auto-ignition temperature: 235°C at 1013 hPa (DIN 51794)

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:

235 °C

Additional information

An auto-ignition temperature value of 235°C at 1013 hPa was determined for the substance using a relevant test method and in compliance with GLP. The result is considered to be reliable and is selected as key study.

The key study is supported by an auto-ignition temperature value of 235°C using a relevant method, but full details are not available.

In a secondary source to which reliability could not be assigned, an auto-ignition temperature value of 220°C at 1013 hPa was reported for the substance.