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Physical & Chemical properties

Melting point / freezing point

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melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2018-01-16 to 2018-01-24
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study

Data source

Reference Type:
study report
Report date:

Materials and methods

Test guidelineopen allclose all
according to guideline
EU Method A.1 (Melting / Freezing Temperature)
according to guideline
OECD Guideline 102 (Melting point / Melting Range)
GLP compliance:
yes (incl. QA statement)
Type of method:
differential scanning calorimetry

Test material

Constituent 1
Reference substance name:
Fatty acids, C14-18 and C16-18-unsatd., ammonium salts
EC Number:
EC Name:
Fatty acids, C14-18 and C16-18-unsatd., ammonium salts
Cas Number:
Molecular formula:
C14H28O2.H3N / C16H32O2.H3N / C18H36O2.H3N / C18H34O2.H3N / C18H32O2.H3N / C18H30O2.H3N / C16H30O2.H3N .
Fatty acids, C14-18 and C16-18-unsatd., ammonium salts
Test material form:
other: paste-like
Details on test material:
Test Substance Name: Fatty acids, C14-18 and C16-18-unsatd., ammonium salts.
Product Name/Synonym: Ammonium Oleate.
CAS number: 68604-33-1.
EG number: 271-685-3.
Batch Number: 2017-30 2022-30 04.
Purity of this sample/batch: 85.3% (contains 14.7% water).
Description: Yellow-brown paste.
Expiry date: KW30 2022 (July 2022).

Results and discussion

Melting / freezing point
Key result
Melting / freezing pt.:
>= -19.1 - <= 14.89 °C
Remarks on result:
other: Melting (Freezing) Range

Any other information on results incl. tables

Table of results (Screening Test):

   Onset temp. (°C) Heat of melting (J.g-1) 
First Endotherm -19.44 96.866
Second Endotherm 38.85 102.56
Third Endotherm 84.15 23.113 
Fourth Endotherm 104.14 153.27

On completion of testing a tiny drop of colourless sample remained at the bottom of the pan.

The endotherm observed with an onset of -19.44 was considered to be due to melting. Therefore formal analysis was conducted between -50 to 150°C at 1 K.min-1.

Table of results:

  Run 1 Run 2 Run 3 Run 4
Endotherm onset temp. (°C) -19.10 -18.82 -18.66 -18.03
Mass of Sample Used (g) 5.04 3.19 4.72 4.70

Due to the broadness and multi-peak nature of the endotherm and the multi-component nature of the sample the melting/ freezing temperature has been reported as a range.

Applicant's summary and conclusion

Melting range of the test substance is -19.10 to 14.89°C.
Executive summary:

Melting (Freezing) Range: -19.10 to 14.89°C.