Fatty acids, C18-unsatd., dimers, hydrogenated, reaction products with Phytosterol, Isooctadecan-1-ol, Hexadecan-1-ol, Octadecan-1-ol and Docosan-1-ol

Melting point / freezing point

Administrative data

Endpoint:

melting point/freezing point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

02 Jul 2018 -25 Jan 2019

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2019

Report date:

2019

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

OECD Guideline 102 (Melting point / Melting Range)

Version / remarks:

1995

Deviations:

no

Test guideline 2

Qualifier:

according to guideline

Guideline:

EU Method A.1 (Melting / Freezing Temperature)

Version / remarks:

2016

Deviations:

no

Test guideline 3

Qualifier:

according to guideline

Guideline:

EPA OPPTS 830.7200 (Melting Point / Melting Range)

Version / remarks:

1998

Deviations:

no

GLP compliance:

yes

Type of method:

differential scanning calorimetry

Test material

Test material information

Constituent 1

Reference substance name:

Fatty acids, C18-unsatd., dimers, hydrogenated, reaction products with Phytosterol, Isooctadecan-1-ol, Hexadecan-1-ol, Octadecan-1-ol and Docosan-1-ol

EC Number:

817-761-7

Cas Number:

765293-81-0

Molecular formula:

Not applicable

IUPAC Name:

Fatty acids, C18-unsatd., dimers, hydrogenated, reaction products with Phytosterol, Isooctadecan-1-ol, Hexadecan-1-ol, Octadecan-1-ol and Docosan-1-ol

Test material form:

other: waxy paste

Details on test material:

Appearance: White to pale yellow waxy paste
Test item storage: At room temperature
Stable under storage conditions until: 30 May 2019 (retest date)

Results and discussion

Melting / freezing point

Melting / freezing pt.:

>= 20.3 - <= 32.3 °C

Decomposition:

yes

Decomp. temp.:

> 200 °C

Any other information on results incl. tables

During heating two endothermic effects were observed between -50°C and 50°C followed by a strong exothermic effect starting at 200°C. The peak max temperature of the first endothermic effect was 20.683°C and for the second 32.524°C. The endothermic effects were most likely obtained due to melting of the test item. The exothermic effect was probably obtained due to reaction and/or decomposition of the test item.

After the experiment, a brown molten residue remained in the sample container (original colour: off white pale yellow). The change of the colour indicated reaction and/or decomposition of the test item. Based on this visual observation, it was found that the test item had molten and the change of the colour demonstrated reaction and/or decomposition of the test item.

In order to investigate the endothermic effects, Experiment 2 was stopped directly after the second melting effect. The peak max temperature of the first effect was 19.895°C and for the second 32.014°C. After the experiment, an off white molten residue remained in the sample container (original colour: off white pale yellow). It demonstrated that melting was the reason for the endothermic effects.

Since the test item is a UVCB, the melting temperature was determined as a melting range obtained from the average peak max of the first melting temperature (20.3 °C) and the average peak maximum of the last melting temperature (32.3 °C).