Fatty acids, tall-oil, compds. with triethanolamine

Melting point / freezing point

Administrative data

Endpoint:

melting point/freezing point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

from 12 June 2017 to 20 September 2017

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2017

Report date:

2017

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

EU Method A.1 (Melting / Freezing Temperature)

Version / remarks:

2008

Deviations:

no

Test guideline 2

Qualifier:

according to guideline

Guideline:

OECD Guideline 102 (Melting point / Melting Range)

Version / remarks:

1995

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, tall oil, compds. with triethanolamine

Cas Number:

68132-46-7

IUPAC Name:

Fatty acids, tall oil, compds. with triethanolamine

Test material form:

solid

Remarks:

(paste)

Details on test material:

- Name of test material as cited in the report: TOFA TEA salt
- Physical appearance: amber paste
- Test material storage: at room temperature

Specific details on test material used for the study:

The test material is a paste at room temperature.

Results and discussion

Melting / freezing point

Key result

Melting / freezing pt.:

>= -19.9 - <= 50.6 °C

Decomposition:

yes

Decomp. temp.:

> 65 °C

Any other information on results incl. tables

TGA EXPERIMENT (PRELIMINARY TEST)

Starting at 150°C, the weight of the sample decreased significantly: 25% weight loss at 374°C and 70% weight loss at 426°C.

After the experiment, a dark brown molten residue remained in the sample container. The change of the colour indicated reaction and/or decomposition of the test item.

 

DSC EXPERIMENT 1

During cooling two exothermic peaks were observed between 0°C and -50°C, mostly likely due to crystallisation. During heating an endothermic peak was observed between -50°C and 25°C (extrapolated onset temperature: -19.707°C). Another endothermic peak was observed between 25°C and 75°C (extrapolated onset temperature: 51.062°C). The endothermic effects were most likely obtained due to melting of the test item. Up to the maximum temperature of 374°C, no signal associated with boiling was observed. After the experiment, a yellow molten residue remained in the sample container. The colour of this residue was darker than before DSC analysis. It was, therefore, concluded that the test item had reacted and/or decomposed during the test.

DSC EXPERIMENT 2

In order to investigate whether reaction and/or decomposition of the test item did already occur during melting, Experiment 2 was stopped directly after the second melting peak.  The extrapolated onset temperature of the first peak was -20.071°C and of the second peak was 50.169°C. After the experiment, a light yellow molten residue remained in the sample container. The colour of this residue agreed with the colour before DSC analysis. This demonstrated that melting was the reason for these two endothermic effects and that reaction and/or decomposition of the test item did not occur at temperatures up to 65°C. 

DATA HANDLING

The melting temperature was determined as a melting range obtained from the average extrapolated onset of the first melting temperature (-19.9°C) and the average peak maximum of the last melting temperature (50.6°C).

Applicant's summary and conclusion

Conclusions:

The melting range of the substance was determined to be -19.9 to 50.6°C.

Executive summary:

Differential Scanning Calorimetry (DSC) experiments were performed in a GLP study according to EC A.1, OECD 102 and OPPTS 830.7200.

A melting range instead of a well defined melting temperature was determined. From duplicate experiments, the melting range was determined to be -19.9°C to 50.6°C.

Reaction and/or decomposition of the substance occurs at temperatures above 65°C.

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