Tetramethylsilane

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:

2009-08-17 to 2009-08-19

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:

European Community (EC), EC no. 440/2008, Part A: Methods for the Determination of Physico-Chemical Properties, Guideline A.15, Official Journal of the European Union no. L142, May 31, 2008.

Qualifier:

according to guideline

Guideline:

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

Version / remarks:

May 2003

Qualifier:

according to guideline

Guideline:

IEC 60079-4 (Electrical apparatus for explosive gas atmospheres. Part 4: Method of test for ignition temperature)

Version / remarks:

1975

GLP compliance:

yes

Key result

Auto-ignition temperature:

340 °C

Atm. press.:

ca. 1 019.5 - ca. 1 019.6 hPa

Results

Preliminary test

The estimated auto-ignition temperature was 410°C.

 

Main study

The results of the main study on the determination of the auto-ignition temperature of the test substance are given in Table 1.

 

With each test a minimum auto-ignition temperature was obtained. The maximum deviation between the three values was < 20°C. According to the guidelines, no further testing was required.

 

The lowest temperature at which ignition of the test substance occurred was 343°C. This temperature was rounded off to the nearest multiple of 5°C giving an auto-ignition temperature of the test substance of 340°C.

 

Table 1       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	407	8	orange/blue	350
	500	350	26	orange
	1000	> 357^#	-	-
2	160	373	11	orange/blue	344
	375	344	25	orange
	420	349	22	orange
3	250	352	26	orange	343
	320	343	25	orange
	600	352	23	orange

#           No ignition of the test substance was observed. With this information the minimum auto-ignition temperature for Test 1 was obtained. No further testing was performed concerning safety reasons.

 

Conclusion

 

The test substance is auto-ignitable with an auto-ignition temperature at 1019.5 – 1019.6 hPa of 340°C.

Conclusions:

An auto-ignition temperature value of 340°C at 1019 hPa was determined for the substance in a reliable study conducted according to an appropriate test protocol, and in compliance with GLP.

Description of key information

Auto-ignition temperature: 340°C at 1019.5-1019.6 hPa (EU Method A.15)

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:

340 °C

Additional information

A measured auto-ignition temperature value of 340°C at 1019.5-1019.6 hPa was determined for the substance in accordance with EU Method A.15 and in compliance with GLP. The result is considered to be reliable.