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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 9, 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.:
< -35.2 °C
Remarks on result:
other: (temperature of initial freezing point)

During the test the temperature of samples decreased at a constant rate, for measurement No. 1 to the temperature of -35.2 ºC and for measurement No. 2 to the temperature of -30.5 ºC. The crystallization was not observed during all measurements.

The crystallization of di(tert-butoxy)diacetoxysilane was not visually observed up to -35.2 °C.

Conclusions:
The crystallization of di(tert-butoxy)diacetoxysilane was not visually observed up to -35.2 °C.
Executive summary:

The determination of the freezing point of di(tert-butoxy)diacetoxysilane 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 crystallization of di(tert-butoxy)diacetoxysilane was not visually observed up to -35.2 °C. According to Column 2 of REACH Annex VII, the study does not need to be conducted below a lower limit of –20 °C.

Description of key information

Key study: EU Method A.1. GLP study. The crystallization of diacetoxydi-tert-butoxysilane was not visually observed up to -35.2 °C.

Key value for chemical safety assessment

Additional information

Key study: The determination of the freezing point of diacetoxydi-tert-butoxysilane 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 crystallization of diacetoxydi-tert-butoxysilane was not visually observed up to -35.2 °C. According to Column 2 of REACH Annex VII, the study does not need to be conducted below a lower limit of –20 °C.

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