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Auto flammability

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Reference
Endpoint:
auto-ignition temperature (gases)
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2000-08-30
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study without detailed documentation
Qualifier:
equivalent or similar to guideline
Guideline:
EU Method A.15 (Auto-Ignition Temperature (Liquids and Gases))
Version / remarks:
ASTM E918-83
Deviations:
not specified
GLP compliance:
no
Remarks:
Internal quality program similar to GLP. Test lab is an authorised US DOT explosives test facility
Auto-ignition temperature:
245 °C
Atm. press.:
1 013 hPa
Remarks on result:
other:
Conclusions:
An auto-ignition temperature value of 245°C at 1013 hPa was obtained for the substance using a relevant test method. The result is considered to be reliable.

Description of key information

Auto-flammability: 245°C (ASTM E918-83)

Key value for chemical safety assessment

Autoflammability / Self-ignition temperature at 101 325 Pa:
245 °C

Additional information

Two measured studies are available for the auto-flammability of the submission substance. In the first study (Dow Corning 2014: summary of previous study results), the auto-ignition temperature study of trimethylsilane was conducted in accordance with ASTM E918-83 (93). The test apparatus was made up of a 1 litre stainless steel chamber which is heated uniformly to a predetermined temperature. The auto-ignition temperature determined for trimethylsilane is 245°C at 1013 hPa. Although, the study is not conducted in accordance with GLP, the test laboratory has an internal quality system being an authorised US DOT explosives test facility. This result is considered to be reliable and is selected as key study.

In the second study (Griffiths 1958); the auto-ignition study of trimethylsilane was determined using a drop technique. The spontaneous ignition temperatures were determined at a fixed delay time of 5 seconds and with a fuel/air ratio controlled between the limits of two and three times the stoichiometric requirement. An auto-ignition temperature of 320°C was obtained for the submission substance.

The key study is selected as the lowest measured auto-ignition temperature using a conservative approach. In addition, the second study lacks information on the test material and at what atmospheric pressure the study was conducted.