Dichlorocyclohexylmethylsilane

Melting point / freezing point

Link to relevant study record(s)

Reference

Endpoint:

melting point/freezing point

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

guideline study with acceptable restrictions

Remarks:

The study was conducted according to an appropriate test method. It was not compliant with GLP.

Qualifier:

according to guideline

Guideline:

OECD Guideline 102 (Melting point / Melting Range)

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method A.1 (Melting / Freezing Temperature)

Deviations:

no

GLP compliance:

no

Other quality assurance:

other: ISO 9001:2008

Type of method:

differential scanning calorimetry

Key result

Melting / freezing pt.:

-45.7 °C

Atm. press.:

101.3 kPa

Test	Result (°C)
1	-45.7
2	-45.7
Mean value	-45.7 (227.5K) if cooling to a temperature below -95°C (178 K).

Approximate accuracy of the instrument: ± 0.5 K (up to 600K)

The DSC diagrams show an exothermic process beginning at about -95°C (~178 K). This can be interpreted as a kind of crystallization process, so that a solid phase results. The solid phase melts with an endothermic reaction at -45.7°C (227.5 K) onset temperature (see attached DSC thermograms).

This melting temperature is only detectable if the cooling process is carried out to a temperature below the crystallisation temperature (-95°C). If the cooling process stops above the crystallisation temperature at -80°C (~ 193 K) no peaks can be detected in the DSC diagram, i.e. no melting point can be observed (see attached DSC thermograms).

Additionally the liquid test substance was cooled in a test glass with a mixture of dry ice and isopropanol to –70°C. Thereby no visible change occurred in the physical state of the test substance.

Conclusions:

A melting temperature of -45.7°C at 1013 hPa was determined for the substance using a relevant test method, the result is considered to be reliable.

Description of key information

Melting point: -45.7°C at 1013 hPa (OECD 102)

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:

-45.7 °C

Additional information

A measured melting temperature of -45.7°C at 1013 hPa was determined for the substance using differential scanning calorimetry (DSC) in accordance with OECD Test Guideline 102 and in compliance with a known quality system (ISO 9001:2008). The result is considered to be reliable.