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Physical & Chemical properties

Melting point / freezing point

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Reference
Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
February 14, 2012
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Remarks:
According to EU Method A.1. GLP Study.
Qualifier:
according to guideline
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Deviations:
no
Qualifier:
according to guideline
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
method to determine freezing temperature
Remarks:
(PN-ISO 1392: Method for the determination of the freezing point: 2002)
Key result
Melting / freezing pt.:
-14.7 °C
Remarks on result:
other: (Average temperature of and initial freezing point) (standard deviation: ±4.8 ºC)

Measurement of vinyltriacetoxysilane freezing point:

Measurement No. 1

Measurement No. 2

Initial value of freezing point, [˚C]

-18.1*

Initial value of freezing point, [˚C]

-11.3**

Average temperature of an initial freezing point ± stand. deviation,[˚C]

-14.7 ± 4.8

*/ As the value of an initial freezing point for the measurement No. 1 the value which corresponded to 78st minute was assumed.

**/ As the value of an initial freezing point for the measurement No. 2 the value which corresponded to 44th minute was assumed.

During the test the temperature of samples initially decreased at a constant rate.

After a 78th minute of reading for measurement No. 1 and 44th minute of that for measurement No. 2 the graph shown a significant increase in temperature. In this moment the opacity of test samples rapidly increased (significant increase in resistance to mixing ).

The average value of an initial freezing point of vinyltriacetoxysilane was equal to: -14.7 ± 4.8 ˚C.

Conclusions:
The initial freezing point of vinyltriacetoxysilane was determined to be -14.7 ± 4.8 ˚C.
Executive summary:

The determination of the freezing point of vinyltriacetoxysilane was performed according to EU Method A.1 in conformity with OECD Guideline 102 (PN-ISO 1392: Method for the determination of the freezing point). The initial freezing point of vinyltriacetoxysilane was determined to be -14.7 ± 4.8 ˚C.

Description of key information

Key study: EU Method A.1. GLP study. The initial freezing point of vinyltriacetoxysilane was determined to be -14.7 ± 4.8 ˚C.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
-14.7 °C

Additional information

Key study: The determination of the freezing point of vinyltriacetoxysilane was performed according to EU Method A.1 and OECD Guideline 102 (PN-ISO 1392: Method for the determination of the freezing point). The initial freezing point of vinyltriacetoxysilane was determined to be -14.7 ± 4.8 ˚C.