Polysulfides, bis[3-(triethoxysilyl)propyl]

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:

2015-08-04 to 2015-08-11

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))

Version / remarks:

Council Regulation (EC) No 440/2008

Deviations:

no

Qualifier:

according to guideline

Guideline:

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

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Key result

Auto-ignition temperature:

250 °C

Atm. press.:

>= 998 - <= 1 004 hPa

The measurement results are shown in the following tables.

Preliminary test

Test No.	Sample volume [µL]	Barometric pressure [mBar]	Temperature [°C]	Ignition delay [s]	Test result
1	150	1001	300	35	Ignition
2	150	1001	280	15	Ignition
3	150	1001	260	30	Ignition
4	150	1001	240	-	No ignition
5	150	1001	245	-	No ignition
6	150	1001	250	-	No ignition
7	150	1001	255	30	Ignition

 

Result value from preliminary test series: ignition: 255°C, no ignition: 250°C

Main test

First main test series

Test No.	Sample volume [µL]	Barometric pressure [mBar]	Temperature [°C]	Ignition delay [s]	Test result
1	150	998	255	35	Ignition
2	150	998	252	-	No ignition
3	400	998	252	-	No ignition
4	300	998	254	35	Ignition
5	300	998	253	40	Ignition
6	300	998	252	-	No ignition
7	400	998	252	-	No ignition

 

Results first main test series: ignition: 253°C, no ignition: 252°C

Second main test series

Test No.	Sample volume [µL]	Barometric pressure [mBar]	Temperature [°C]	Ignition delay [s]	Test result
1	300	1003	255	32	Ignition
2	300	1003	252	-	No ignition
3	150	1003	252	-	No ignition
4	400	1003	252	35	Ignition
5	400	1003	250	-	No ignition
6	300	1003	250	-	No ignition
7	150	1003	250	-	No ignition
8	300	1003	250	-	No ignition
9	450	1003	250	-	No ignition

 

Results second main test: ignition: 252°C, no ignition: 250°C

Retest

Test No.	Sample volume [µL]	Barometric pressure [mBar]	Temperature [°C]	Ignition delay [s]	Test result
1	300	1004	252	40	Ignition
2	300	1004	250	-	No ignition
3	200	1004	250	-	No ignition
4	400	1004	250	-	No ignition
5	500	1004	250	-	No ignition
6	150	1004	250	-	No ignition
7	125	1004	250	-	No ignition

 

Results retest: ignition: 252°C, no ignition: 250°C

Evaluation

lowest value from pretest:	255°C
lowest value for first main test:	253°C
lowest value for second main test:	252°C
lowest value for retest:	252°C

 

Lowest value of all main test/retest series: 252°C.

Correction of the temperature according to the last DKD calibration (06/2015) of the temperature

measurement chain (thermocouple + monitor) is already considered (value of -0.5°C).

Conclusions:

An auto-ignition temperature value of 250°C at 998-1004 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: 250°C at 998-1004 hPa (EU Method A.15)

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:

250 °C

Additional information

An auto-ignition temperature value of 250°C at 998-1004 hPa was determined for the substance using a relevant test method in accordance with EU Test Method A.15 and in compliance with GLP. The result is considered to be reliable and is selected as key study.

 

In a secondary source to which reliability could not be assigned, an auto-flammability value of 240°C at 1013 hPa was reported for the substance.