Benzenesulfonic acid, methyl-, C20-24 (even numbered) sec-alkyl derivs.

Surface tension

Link to relevant study record(s)

Reference

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

key study

Study period:

23 September - 16 November 2016

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

OECD Guideline 115 (Surface Tension of Aqueous Solutions)

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method A.5 (Surface Tension)

Deviations:

no

GLP compliance:

yes

Type of method:

ring method

Specific details on test material used for the study:

- Analytical purity: 94.55 %
- Expiration date: 31 December 2017
- Storage condition: at room temperature

Key result

Surface tension:

35.8 mN/m

Temp.:

20 °C

Conc.:

1 g/L

The calibration factor for the torsion balance at 20°C was 1.0034.

The measured mean surface tension of a nominal 1 g/L solution of the test substance was 38.1 mN/m (mean of 38.0, 38.0, 38.0, 38.0 and 38.5 mN/m) at 20°C.

The corrected surface tension was; 38.2 mN/m.

The surface tension was <60 mN/m. Therefore, the Harkins-Jordan correction was applied and the corrected surface tension was 35.8 mN/m.

Conclusions:

The surface tension of the substance was determined to be 35.8 mN/m at a test concentration of 1 g/L and at 20°C.

Description of key information

Based on a GLP study (K1, Foster, 2016) according to the EU method A.5 and OECD guideline 115, the surface tension was determined to be 35.8 mN/m at a test concentration of 1 g/L and at 20°C.

Key value for chemical safety assessment

Surface tension:

35.8

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

1 000