Alcohols, C10-12, ethoxylated

Surface tension

Link to relevant study record(s)

Reference

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

key study

Study period:

07 March 2012

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.5 (Surface Tension)

Qualifier:

equivalent or similar to guideline

Guideline:

OECD Guideline 115 (Surface Tension of Aqueous Solutions)

GLP compliance:

no

Type of method:

ring method

Surface tension:

24.9 mN/m

Temp.:

22 °C

Conc.:

220 mg/L

Water calibration: Temp. = 24 °C, σ = 0.997 g/cm³

Value	Surface tension of purified water (mN/m)
1	71.3
2	71.1
3	71.2
4	71.2
5	71.2
6	71.2
Arithmetic mean	71.2
Standard deviation	0.1

Arithmetic mean 71.2 mN/m, standard deviation 0.1 mN/m, theoretical value: 72.0 mN/m -> correction factor 1.0112

Test item, 1st measurement:

C=220.0 mg/L, T=22 °C, σ=0.9978 g/cm³, age of solution=47 min

Value	Surface tension of solution 1 (mN/m)
1	24.5
2	24.6
3	24.6
4	24.6
5	24.4
6	24.5
Arithmetic mean	24.6
Standard deviation	0.1

Arithmetic mean 24.6 mN/m, satandard deviation 0.1 mN/m

Test item, 2nd measurement:

C=222.8 mg/L, T=22 °C, σ=0.9978 g/cm³, age of solution=54 min

Value	Surface tension of solution 1 (mN/m)
1	24.5
2	24.6
3	24.6
4	24.6
5	24.4
6	24.5
Arithmetic mean	24.6
Standard deviation	0.1

 Arithmetic mean 24.6 mN/m, satandard deviation 0.1 mN/m

Conclusions:

Substance is surface active.

Description of key information

24.9 mN/m at 22 °C (EU Method A.5)

Key value for chemical safety assessment

Surface tension:

24.9

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

220

Additional information

The surface tension of the substance was determined with an automatic tensiometer according to EU Method A.5. The concentration of the test solution was determined to be 220 mg/L. The substance possesses surface active properties.