Hexafluoropropene, oxidized, oligomers, reduced, fluorinated

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:

supporting study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: No details on test method are given, however the data source is authoritative and reliable and the results are considered acceptable for assessment.

Reason / purpose for cross-reference:

reference to same study

Principles of method if other than guideline:

not reported

GLP compliance:

not specified

Type of method:

pour point

Key result

Remarks on result:

other: Pour point < -110°C

Conclusions:

The Pour Point of GALDEN LMW is lower than -110 °C.

Executive summary:

The scope of the publication was to analyse perfluoropolyethers (PFPEs) from the point of view of their synthetic chemistry, properties, derivates, and applications. The focus of the publication is on PFPE fluids commercially named FOMBLIN and GALDEN and the information gleaned from first-hand experience are reported. FOMBLIN and GALDEN belong to the same class of PFPEs, the principal difference between the two families is the molecular weight since GALDEN represents the low molecular weight fraction of FOMBLIN. Both of FOMBLIN and GALDEN are fluids at standard conditions.

In the publication the chemical and physical properties of several commercial products of the GALDEN fraction are reported. GALDEN LMW, which itself represents the low molecular weight fraction of the GALDEN fraction is also described with the commercial name of GALDEN HT 70.

The Pour Point of GALDEN LMW, experimentally determined, is reported to be < -110 °C.

Reference 2

Endpoint:

melting point/freezing point

Data waiving:

study scientifically not necessary / other information available

Justification for data waiving:

other:

Justification for type of information:

JUSTIFICATION FOR DATA WAIVING

The Pour Point of GALDEN HT70 is reported < -110 °C ( Sianesi et Al, 1994).
This information is consistent with public experimental data which report the pour point of GALDEN HT55 < -115°C and the pour point of GALDEN HT70 = -115°C.
The pour point of a liquid is the temperature below which the liquid loses its flow characteristics.
The melting point of GALDEN LMW is therefore expected to be below -110 °C and testing is unjustified.

Reference 3

Endpoint:

melting point/freezing point

Type of information:

other: public data

Adequacy of study:

supporting study

Reliability:

2 (reliable with restrictions)

Rationale for reliability incl. deficiencies:

other: No details on test method are given, however the data source is authoritative and reliable and the results are considered acceptable for assessment.

GLP compliance:

no

Type of method:

pour point

Specific details on test material used for the study:

GALDEN HT55, GALDEN HT70

Melting / freezing pt.:

< -125 °C

Remarks on result:

other: Pour Point

Remarks:

GALDEN HT55

Melting / freezing pt.:

< -110 °C

Remarks on result:

other: Pour Point

Remarks:

GALDEN HT70

Conclusions:

The pour point of GALDEN LMW is reported to be <= -115°C.

Executive summary:

Pour point data are reported on the Company technical brochure and based on experimental measurements.

The pour point of GALDEN LMW is reported to be:

GALDEN HT55 : pour point < -125°C

GALDEN HT70 : pour point <-110°C

The Pour Point variability is consistent with the difference in concentration of the individual constituents.

Description of key information

In accordance with Column 2 adaptation of REACH Annex VII, Information requirement section 7.2, a melting/freezing point study does not need to be conducted below a lower limit of -20 °C.
The experimentally determined Pour Point of GALDEN LMW is lower than -110 °C, consequently the Melting Point of GALDEN  is well below  than -20 °C.  Conduting a melting/freezing point study is therefore unjustified and the study has been waived.

Additional information

A reliable publication is reported, which discusses perfluoropolyethers (PFPEs) from the point of view of their synthetic chemistry, properties, derivates, and applications. Moreover, public information based on Company data is available.

The Pour Point of GALDEN LMW, experimentally determined, is < -110 °C.