Resin acids and Rosin acids, esters with glycerol and diethylene glycol

Melting point / freezing point

Link to relevant study record(s)

Reference

Reference 1

Endpoint:

melting point/freezing point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

7 - 9 Oct 2020

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 102 (Melting point / Melting Range)

GLP compliance:

yes

Type of method:

differential scanning calorimetry

Specific details on test material used for the study:

SOURCE OF TEST MATERIAL
- Source (i.e. manufacturer or supplier) and lot/batch number of test material: Super Ester A-75 / Lot K9C029
- Purity:100% (w/w)
- Expiration date: 14 July 2025

Key result

Melting / freezing pt.:

28.8 °C

Sample Type	Weight of Sample (mg)	Onset Temp (°C)
Definitive, 10 °C/min	2.589	29.6
Definitive, 10 °C/min	2.378	29.3
Definitive, 10 °C/min	2.282	29.6
Definitive, 5 °C/min	3.083	27.2
Definitive, 5 °C/min	2.245	28.3
Definitive, 5 °C/min	2.328	28.9
	Overall Mean	28.8
	Overall SD	0.947

Conclusions:

The melting point of rosin acid derivative was determined to be 28.8 °C (OECD 102).

Executive summary:

The melting point of rosin acid derivative was determined using differential scanning calorimetry (DSC). During the heating phase a distinct endothermic effect was observed. The standard deviation from onset temperature in the six tests was 0.947 °C from their mean value of 28.8 °C. The study was conducted in accordance with OECD 102 guidelines and was GLP compliant. Therefore, the study is considered reliable without restrictions.

Reference 2

Endpoint:

melting point/freezing point

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: GLP compliant, guideline study, available as unpublished report, fully acceptable without restriction

Qualifier:

according to guideline

Guideline:

EU Method A.1 (Melting / Freezing Temperature)

GLP compliance:

yes (incl. QA statement)

Type of method:

capillary method

Key result

Melting / freezing pt.:

62.1 - 87.1 °C

Atm. press.:

101.3 kPa

Decomposition:

no

Sublimation:

no

Apparatus : Melting temperature devices with liquid bath and a calibrated, digital thermocouple system.

Run Number	1	2
Mass of Sample Used (g)	0.034	0.031
Initial Melting Temperature (°C)	63.2	62.1
Final Melting Temperature (°C)	86.5	87.1

Conclusions:

The following melting range result was obtained: 62.1 - 87.1°C

Executive summary:

The following melting range result was obtained: 62.1 - 87.1°C

Description of key information

The melting points of substances in the category Rosin esters range from <-20°C (freezing point) to 125°C.

The melting point of rosin acid derivative was determined to be 28.8 °C (OECD 102).

Additional information

The study was conducted in accordance with OECD 102 guidelines and was GLP compliant. The melting point of rosin acid derivative was determined using differential scanning calorimetry (DSC). During the heating phase a distinct endothermic effect was observed. The standard deviation from onset temperature in the six tests was 0.947 °C from their mean value of 28.8 °C. The study is considered reliable without restrictions.

A GLP-compliant study, conducted according to EU Method A1, was provided for Resin acids and rosin acids, esters with glycerol (Chilworth Technology, 2010 a). The melting of Resin acids and rosin acids esters with glycerol was determined to occur in the range 62.1-87.1 °C. The test material in this study may be thought of as forming a part of the registered substance composition.  Information provided to support readacross.