Decanoic acid, monoester with glycerol

Melting point / freezing point

Administrative data

Endpoint:

melting point/freezing point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

26 Jun - 11 Jul 2017

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2018

Report date:

2018

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

OECD Guideline 102 (Melting point / Melting Range)

Version / remarks:

27 July 1995

Test guideline 2

Qualifier:

according to guideline

Guideline:

EU Method A.1 (Melting / Freezing Temperature)

Version / remarks:

30 May 2008

GLP compliance:

yes (incl. QA statement)

Remarks:

Landesamt für Umwelt, Wasserwirtschaft und Gewerbeaufsicht, Mainz, Germany

Type of method:

capillary method

Test material

Test material information

Constituent 1

Reference substance name:

Esterification product of glycerol and C8-C12 (even numbered) fatty acids

Molecular formula:

not applicable, substance is UVCB

IUPAC Name:

Esterification product of glycerol and C8-C12 (even numbered) fatty acids

Results and discussion

Melting / freezing point

Key result

Melting / freezing pt.:

>= 40.4 - <= 49.1 °C

Atm. press.:

ca. 1 013 hPa

Remarks on result:

other: Pressure was not measured. Based on capillary method, it is assumed to be atmospheric pressure (ca, 1013 hPa

Any other information on results incl. tables

Pre-Test results

The following values were recorded:

Begin of melting process	End of melting process
38.3 °C	47.8 °C

 

At the test start the appearance of the test item was stated as a solid, wax like.

The test item melted to a clear liquid. After cooling down, the test item stayed liquid. On the next day the capillary was inspected, the test item was solid again.

 

Main Test

The capillary tube containing the test item was set into the block at 25.3 °C (first determination) and 25.7 °C (second determination). The block was heated gently with heating rate of < 1 K/min until melting started. The temperature was noted at which the first signs of melting of the test item were observed. When the substance was completely melted, the temperature was noted again.

All values and observations are presented in the following tables:

 

Values Main Test

Melting point/range	Begin	End
First Determination	40.2 °C (313.4 K)	48.9 °C (322.1 K)
Second Determination	40.6 °C (313.8 K)	49.2 °C (322.4 K)

 

Observations Main Test

Observations	First Determination	Second Determination
The test item getting glassy	35.4 °C	36.0 °C
The test item melted to a clear liquid	40.2 °C	40.6 °C

The test item melted to a clear liquid. After cooling down, the test item stayed liquid.

 

The means between both determinations give the following values for the melting range:

Melting range: 40.4 °C to 49.1 °C (313.6 to 322.3 K)

Standard deviation: 0.28 (begin); 0.21 (end)

Estimated accuracy: ± 0.4 °C

 

 

All validity criteria are presented in the following table.

Parameter	Criterion	Found	Assessment
Difference between duplicate determinations	≤0.5 K	0.4 K	valid
Difference between begin and end of melting process	≤0.5 K	8.7 K	melting range is stated

 

 

Discussion

The validity criterion “difference between duplicate determinations” was met. The test item showed a melting range, no melting point. As the test item is a UVCB product, this is considered as normal.

No observations were made which might cause doubts on the validity of the study outcome. Therefore, the result of the study is considered valid.