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Surface tension

Link to relevant study record(s)

Reference

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

key study

Study period:

From 11 Aug 2020 to 17 Aug 2020

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.5 (Surface Tension)

Version / remarks:

2016

Deviations:

no

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

Key result

Surface tension:

32.1 mN/m

Temp.:

20 °C

Remarks on result:

other: Conc.= 90% saturation in water

Table: Surface tension measurements

Measurement	Time passed after measurement start [seconds]	Surface tension (mN/m)
		individual σ multiplied by Harkins-Jordan corrected value	mean σ *
1	33.97	32.55	32.11
2	58.58	32.43
3	77.58	32.02
4	100.10	31.96
5	127.86	32.33
6	146.54	31.92
7	174.07	32.31

* Mean calculated from measurements 3 to 7, after equilibrium was reached.

Conclusions:

The surface tension of an aqueous substance solution at 90% saturation was determined to be 32.1 mN/m (at 20°C).

Executive summary:

The OECD harmonized ring method was used in a GLP study based on EC A.5 and OECD 115. The surface tension of an aqueous substance solution at 90% saturation was determined to be 32.1 mN/m (at 20°C). According to EC A.5 the substance is surface active. 

Description of key information

The OECD harmonized ring method was used in a GLP study based on EC A.5 and OECD 115. Thesurface tension of an aqueous substance solution at 90% saturation was determined to be 32.1 mN/m (at 20°C). According to EC A.5 the substance is surface active.

Key value for chemical safety assessment

Surface tension:

32.1

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

900