Resin acids and Rosin acids, esters with trimethylolpropane

Surface tension

Link to relevant study record(s)

Reference

Endpoint:

surface tension

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.5 (Surface Tension)

Deviations:

no

Qualifier:

according to guideline

Guideline:

OECD Guideline 115 (Surface Tension of Aqueous Solutions)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

ring method

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

Surface tension:

70 mN/m

Temp.:

20.7 °C

Conc.:

90 other: % saturation

A platinum ring with a circumference of 4 cm was used. Once calibrated, the balance and ring assembly used in this test gave a direct reading for surface tension that is within the required accuracy (± 0.5 mN/m).

Conclusions:

The mean surface tension of two duplicate solutions prepared at 90% test substance in water, was determined to 70.0 mN/m at 20.7 ± 0.5°C. Therefore the test substance was considered not to be surface-active.

Executive summary:

The surface tension of the test substance, Resin acids and Rosin acids, esters with trimethylolpropane, was determined via the ring method in a procedure compatible with Method A.5 Surface Tension of Commission Regulation (EC) No. 440/2008 (30 May 2008) and Method 115 of the OECD Guidelines for the Testing of Chemicals (27 July 1995).

The samples were prepared and then an aliquot if each sample solution was transferred to an individual measuring vessel and allowed to equilibriate for at least one hour at ambient temperature. Each measuring vessel was then placed onto the torsion balance and the platform was raised until the platinum ring was in contact with the surface of the solution.

Several measurements were made for surface tension. A measurement of the surface tension of the checked, in-tolerance purified water was performed before the first and after the subsequent sample measurement to ensure the test system was working within the defined tolerance.

The mean surface tension of duplicate solutions prepared at 90% saturation of the test substance in water was determined to be 70.0 mN/m at 20.7 ± 0.5°C. Based on the evaluation data, the test substance is therefore not surface-active.

Description of key information

The surface tension of Resin acids and Rosin acids, esters with trimethylolpropane was determined via the ring method in a procedure compatible with Method A.5 Surface Tension of Commission Regulation (EC) No. 440/2008 (30 May 2008) and Method 115 of the OECD Guidelines for the Testing of Chemicals (27 July 1995).

The mean surface tension of duplicate solutions prepared at 90% saturation of the test substance in water was determined to be 70.0 mN/m at 20.7 ± 0.5°C. Based on the evaluation data, the test substance is therefore not surface-active.

Key value for chemical safety assessment

Surface tension:

70