2,4,6-trimethyl-2,4,6-tris(3,3,3-trifluoropropyl)cyclotrisiloxane

Appearance / physical state / colour

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

appearance / physical state / colour

Type of information:

experimental study

Adequacy of study:

weight of evidence

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: The result was sourced from a genetic toxicity study report.

Principles of method if other than guideline:

Visual observation and experience in use and handling.

GLP compliance:

yes

Physical state at 20°C and 1013 hPa:

solid

Key result

Form:

solid

Remarks:

translucent crystals

Colour:

white

Substance type:

organic

Conclusions:

The substance was reported as a translucent white crystals in an in-vitro genetic toxicity study report. The result is considered to be reliable.

Reference 2

Endpoint:

appearance / physical state / colour

Type of information:

experimental study

Adequacy of study:

weight of evidence

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: The result was sourced from a flash point study report.

Principles of method if other than guideline:

Visual observation and experience in use and handling.

GLP compliance:

yes

Physical state at 20°C and 1013 hPa:

solid

Key result

Form:

other: mixture of solid and liquid

Colour:

White crystalline solid at 25°C, colourless transparent liquid at 35°C

Substance type:

organic

Conclusions:

The substance was reported as a white crystalline solid at 25°C, colourless transparent liquid at 35°C in a flash point study report. The result is considered to be reliable.

Description of key information

Physical appearance [2,4,6-trimethyl-2,4,6-tris(3,3,3-trifluoropropyl)cyclotrisiloxane]: The physical state of the substance is influenced by the proportion of the isomers present in the substance and may be either solid or liquid.

Key value for chemical safety assessment

Physical state at 20°C and 1013 hPa:

solid

Additional information

2,4,6-Trimethyl-2,4,6 -tris(3,3,3-trifluoropropyl)cyclotrisiloxane exists as two geometric isomers. In available sources, approximately 80:20 trans:cis substance was reported as a white crystalline or translucent solid at 25°C and a colourless transparent liquid at 35°C.

 

The proportion of each isomer influences the physical state of the substance. The melting point was reported as 35°C for 99.5% trans, -7°C for 85% cis and -1.9°C for 96% cis.

 

The substance as registered is a mono-constituent substance where the main constituent (trans geometric isomer) is present at concentrations≥72% w/w, and a named impurity (the cis geometric isomer) may be present at concentrations≥0% -≤28% w/w. The substance therefore may be solid or liquid at room temperature depending on the proportion of isomers.