Fatty acids, tall-oil, esters with ethylene glycol

Melting point / freezing point

Link to relevant study record(s)

Reference

Endpoint:

melting point/freezing point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

22 Feb - 13 Mar 2018

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Reason / purpose for cross-reference:

reference to same 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)

Type of method:

differential scanning calorimetry

Melting / freezing pt.:

< -20 °C

Atm. press.:

1 013 hPa

Results
Two DSC measurements in an aluminium crucible with a hole were performed. The test item was cooled down with a cooling rate of 1 K/min (-50 °C for the 1^st measurement and -80 °C for the 2^nd measurement), the minimum temperature was kept for 60 min (1^st measurement) and 300 min (2^nd measurement) and afterwards the test item was heated up with a heating rate of 10 K/min (maximum temperature 25 °C). The measurements showed no endothermal effect in the temperature range of -80 to 25 °C.

Table 1: Melting point – DSC measurements

Test item [mg]	Starting temperature [°C]	Final test temperature [°C]	Temperature range (endothermal) [°C]	Onset (melting) [°C]	Crucible	Observations after the measurement
16.77	-50	25	No endothermal effect observed	No endothermal effect observed	Aluminium with a hole	Test item unchanged
12.06	-80

 

Conclusion: No melting point was measured above -80 °C. However, since melting may be hindered at low temperatures due to supercooling it should only be assumed that no melting point exists above -20 °C.

Description of key information

< -20 °C at 1013 hPa (DSC, OECD 102)

Additional information

No melting point was measured above -80 °C. However, since melting may be hindered at low temperatures due to supercooling it should only be assumed that no melting point exists above -20 °C.