Dichloro(methyl)(phenyl)silane

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

Study period:

2011-03-21 to 2011-03-22

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:

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:

no

Other quality assurance:

other: ISO 9001:2008

Type of method:

differential scanning calorimetry

Key result

Melting / freezing pt.:

-49.4 °C

Atm. press.:

101.3 kPa

During measurement, an exothermic process was shown beginning at ~-95°C (~178K) with an onset temperature of ~-90°C (183K). This was interpreted as a form of crystalization process which resulted to the formation of a solid phase. The solid phase melts with an endothermic reaction at -49.4°C (223.8K) onset temperature.

The melting temperature can only be detected if the cooling process is carried out to a temperature below the crystalization temperature (-95°C). The table of results are shown below:

Table 1: Results

Test	Melting temperature
1	-49.4°C
2	-49.4°C
Mean value	-49.4°C (223.8K)

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

Conclusions:

A melting temperature of -49.4°C at 1013 hPa has been determined for the test substance using an appropriate test method. The result is considered reliable.

Description of key information

Melting point/freezing point: -49.4°C at 1013 hPa (OECD 102)

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:

-49.4 °C

Additional information

A measured melting temperature of -49.4°C at 1013 hPa was determined for the registered substance using a differential scanning calorimetry method 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.