2,4,7,9-Tetramethyldec-5-yne-4,7-diol, ethoxylated

Melting point / freezing point

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

melting point/freezing point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2012

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 102 (Melting point / Melting Range)

Principles of method if other than guideline:

DSC method

GLP compliance:

yes

Type of method:

method to determine freezing temperature

Melting / freezing pt.:

-73 °C

Atm. press.:

1 013 hPa

Decomposition:

no

Sublimation:

no

Remarks on result:

other: given is the glass transition temperature since no freezing point is evident within the instruments detection limit, -90°C.

Conclusions:

There was no freezing point evident on the cooling curve or melting point evident on the heating curve. The absence of a freezing or melting point could be attributed to a freeze point below -90°C, the instrument’s lower detection limit, or the sample maybe amorphous whereby the viscosity increases slowly but the material does not crystallize. There was a glass transition evident with an onset of -72.93°C indicating that the material is amorphous and turns to a glass on freezing rather than crystallizing.

Executive summary:

There was no freezing point evident on the cooling curve or melting point evident on the heating curve. The absence of a freezing or melting point could be attributed to a freeze point below -90°C, the instrument’s lower detection limit, or the sample maybe amorphous whereby the viscosity increases slowly but the material does not crystallize. There was a glass transition evident with an onset of -72.93°C indicating that the material is amorphous and turns to a glass on freezing rather than crystallizing.

Reference 2

Endpoint:

melting point/freezing point

Type of information:

experimental study

Adequacy of study:

supporting study

Reliability:

4 (not assignable)

Rationale for reliability incl. deficiencies:

other: manufacturer data without proof

Principles of method if other than guideline:

method not reported

GLP compliance:

not specified

Type of method:

pour point

Melting / freezing pt.:

-25 °C

Decomposition:

no

Conclusions:

The pour point of the substance is reported to be -25°C.

Description of key information

The pour point of the substance is reported to be -25°C.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:

-25 °C

Additional information

Additional data are available for the source substance: 2,4,7,9-Tetramethyl-5-decyne-4,7-diol, ethoxylated (3.8)

There was no freezing point evident on the cooling curve or melting point evident on the heating curve. The absence of a freezing or melting point could be attributed to a freeze point below -90°C, the instrument’s lower detection limit, or the sample maybe amorphous whereby the viscosity increases slowly but the material does not crystallize. There was a glass transition evident with an onset of -72.93°C indicating that the material is amorphous and turns to a glass on freezing rather than crystallizing.