Resin acids and Rosin acids, esters with trimethylolpropane

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:

03 May 2017 - 20 June 2017

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.1 (Melting / Freezing Temperature)

Deviations:

no

Qualifier:

according to guideline

Guideline:

OECD Guideline 102 (Melting point / Melting Range)

Deviations:

no

Qualifier:

according to guideline

Guideline:

EPA OPPTS 830.7200 (Melting Point / Melting Range)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

differential scanning calorimetry

Specific details on test material used for the study:

SOURCE OF TEST MATERIAL
- Batch No.of test material: AN-0400-105
- Expiration date of the lot/batch: 01 January 2019
- Purity : 100% (UVCB)

STABILITY AND STORAGE CONDITIONS OF TEST MATERIAL
- Storage condition of test material: Approximately -20°C, under nitrogen, in the dark

Key result

Melting / freezing pt.:

>= 24.2 - <= 51.2 °C

Remarks on result:

other: ± 0.5°C

The residue was a transparent solid around the periphery of the crucible.

One broad endotherm was observed up to 100°C, with no apparent glass transition observed in the thermogram.

Conclusions:

The melting range of the test substance was determined to be 24.2 - 51.2 ± 0.5°C (297 to 324 ± 0.5°K).

Executive summary:

The melting range of the test substance, Resin acids and Rosin acids, esters with trimethylolpropane, was determined via differential scanning calorimetry using a procedure compatible with Method A.1 Melting/Freezing Temperature of Commission Regulation (EC) No. 440/2008 of 30 May 2008, Method 102 of OECD Guidelines for Testing of Chemicals, 27 July 1995 and Method 830.7200 of the OPPTS Guidelines, March 1998.

The temperature accuracy of the DSC instrument was checked prior to testing with indium and zinc and was within defined tolerances and therefore the instrument was considered acceptable for use. Aliquots of the test substance were placed in twiced pierced cruicbles and subjected to a thermal programme from 0 -100°C at 5°C/min. It is considered that the test substance had fully mobilised as the residue was around the periphery of the crucible.

Since the test substance is a complex mixture (UVCB), a melting range has been reported. The melting range for the test substance was determined to be 24.2 to 51.2 ± 0.5°C (297 to 324 ± 0.5 K).

Description of key information

The melting range of Resin acids and Rosin acids, esters with trimethylolpropane was determined via differential scanning calorimetry using a procedure compatible with Method A.1 Melting / Freezing Temperature of Commission Regulation (EC) No. 440/2008 of 30 May 2008; Method 102 of OECD Guidelines for Testing of Chemicals, 27 July 1995; and Method 830.7200 of the OPPTS Guidelines, March 1998.

Since the test substance is a complex mixture (UVCB), a melting range has been reported. The melting range for the test substance was determined to be 24.2 to 51.2 ± 0.5°C (297 to 324 ± 0.5 K).

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:

37.7 °C

Additional information

The melting range for the test substance was determined to be 24.2 to 51.2 ± 0.5°C (297 to 324 ± 0.5 K). The key value for chemical safety assessment is the average between the the lowest and highest measured value: 37.7 ± 0.5°C.