Fatty acids, tall-oil, esters with ethylene glycol

Surface tension

Link to relevant study record(s)

Reference

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

key study

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Reason / purpose for cross-reference:

reference to other study

Qualifier:

according to guideline

Guideline:

EU Method A.5 (Surface Tension)

Type of method:

ring method

Surface tension:

60.2 mN/m

Temp.:

20 °C

Conc.:

0.94 mg/L

Results
4.70 mg of the test item was diluted in 5000 mL deionized water.

 

Oil drops on the surface of the test solution were observed. The surface tension of the aqueous phase of the test solution was determined.

Table 1: Surface Tension of the aqueous phase of theTest Item

Test item no.		1	2	3	4	5	Mean	S.D.
1	Time (s)	503	587	670	755	839	-	-
	s(mN/m) uncorrected	64.4	64.2	64.2	64.1	64.1	64.2	0.12
	s(mN/m) corrected by Harkins and Jordan	60.4	60.2	60.2	60.1	60.1	60.2	0.11

 

Conclusion: A dilution of 0.94 mg/L of the test item shows oil drops on the surface of the test solution, indicating that the solubility of the test item is smaller than 1 mg/L. Nevertheless, the surface tension of the aqueous phase was measured and determined to be 60.2 mN/m. Additionally, the surface tension of the undiluted sample at 20 +/- 0.5 °C is higher than 60 mN/m.

Therefore, the test item has no surface-active properties according to Regulation440/2008 (EC) consolidated version, Annex A.5.″Surface Tension″.

Description of key information

60.2 mN/m at 20 °C (ring method, EU Method A.5.)

Key value for chemical safety assessment

Surface tension:

60.2

in mN/m at 20°C and concentration in mg/L:

0.94

Additional information

The test item is evaluated as not surface active.