Fatty acids, tall-oil, compds. with triethanolamine

Surface tension

Administrative data

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

key study

Study period:

from 12 June 2017 to 20 September 2017

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2017

Report date:

2017

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

EU Method A.5 (Surface Tension)

Version / remarks:

2008

Deviations:

no

Test guideline 2

Qualifier:

according to guideline

Guideline:

OECD Guideline 115 (Surface Tension of Aqueous Solutions)

Version / remarks:

1995

Deviations:

no

GLP compliance:

yes

Type of method:

OECD harmonised ring method

Test material

Test material information

Constituent 1

Reference substance name:

Fatty acids, tall oil, compds. with triethanolamine

Cas Number:

68132-46-7

IUPAC Name:

Fatty acids, tall oil, compds. with triethanolamine

Test material form:

solid

Remarks:

(paste)

Details on test material:

- Name of test material as cited in the report: TOFA TEA salt
- Physical appearance: amber paste
- Test material storage: at room temperature

Results and discussion

Surface tension

Key result

Surface tension:

34.9 mN/m

Temp.:

20 °C

Remarks on result:

other: Conc.= 90% of saturation solubility

Any other information on results incl. tables

Table: Surface tension measurements

 

Measurement	Time passed after transfer test solution to test vessel [minutes]	Surface tension [mN/m]
		individual	mean	mean (2)
1	16	36.5
2	17	36.3
3	18	37.2
4	19	37.3	37.3 (1)	34.9
5	20	37.1
6	21	37.5
7	22	37.3

(1) Mean calculated from measurements 3 to 7, after equilibrium was reached.

(2) Multiplied by the calibration factor and Harkins-Jordan corrected.

Applicant's summary and conclusion

Conclusions:

The surface tension of an aqueous substance solution at 90% of its saturation solubility was determined to be 34.9 mN/m (at 20°C).

Executive summary:

Using the OECD harmonized ring method in a GLP study according to EC A.5 and OECD 115, the surface tension of an aqueous substance solution at 90% of its saturation solubility was determined to be 34.9 mN/m (at 20°C). According to the EC A.5 guideline the substance is surface active.

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