Fats and Glyceridic oils, shea butter, unsaponifiable fraction

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:

2017

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.1 (Melting / Freezing Temperature)

Qualifier:

according to guideline

Guideline:

OECD Guideline 102 (Melting point / Melting Range)

GLP compliance:

not specified

Type of method:

differential scanning calorimetry

Specific details on test material used for the study:

Batch: XP3646
Appearance/Physical State: White/Pale yellow semi-solid

Key result

Melting / freezing pt.:

> -27 - < 28 °C

Conclusions:

The melting temperature of the test item has been determined to be over the range -27 to 28 ˚C ( 246 to 301 K) .

Executive summary:

The test result was based on the range over which the test item melted. This was because freezing temperatures, although consistent in this case, are susceptible to being lower than the melting temperature due to super cooling. Additionally, it was not possible to accurately determine where the freezing event ended. The melting temperature gives an overall more accurate result but the freezing temperature is included for additional information.

Reference 2

Endpoint:

melting point/freezing point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2017

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 102 (Melting point / Melting Range)

Qualifier:

according to guideline

Guideline:

EU Method A.1 (Melting / Freezing Temperature)

GLP compliance:

yes

Type of method:

capillary method

Specific details on test material used for the study:

XP3646

Key result

Melting / freezing pt.:

> 40 - < 80 °C

Remarks on result:

not determinable

Remarks:

No melting pointg occured over this heating range.

Conclusions:

No melting point could be determined.

Executive summary:

Using two gradients no significant melt was observed and therefore could not be reported. Observations from vapour pressure testing on the same test item, gave an indicative melt of between 40 -80 C, but the accuracy of this measurements is not known. Substance is polymeric in nature and such may exhibit differing behaviour based on the different crystalline forms and the application of different heating rates during testing. Therefore it was not posisble to determine melting point using this test.

Description of key information

The melting/freezing temperature is defined as the point at which phase transition from solid to liquid state (or vice versa) at normal atmospheric pressure takes place. As the phase transition of many substance takes place over a large temperature range, it is often described as a melting/freezing range. During thermal analysis the peak width of an endothermic reaction also depends on sample amount and heating rate. Therefore, the onset point of the relevant endothermic peak is usually stated as the melting temperature. Where the endothermic peaks/effects are poorly defined, a range was stated in the result section.

The melting temperature of the test item has been determined to be over the range -27 to 28 ˚C ( 246 to 301 K) in one study using differential scanning calorimetry method.

In another study using two gradients no significant melt was observed and therefore could not be reported. Observations from vapour pressure testing on the same test item, gave an indicative melt of between 40-80 °C, but the accuracy of this measurements is not known. Substance is polymeric in nature and such may exhibit differing behaviour based on the different crystalline forms and the application of different heating rates during testing. Therefore it was not posisble to determine melting point using this test.

In conclusion it is not tehnically possible to report a single melting point for this test item.