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Physical & Chemical properties

Surface tension

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Reference
Endpoint:
surface tension
Type of information:
experimental study
Adequacy of study:
key study
Study period:
17 - 19 May 2016
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
EU Method A.5 (Surface Tension)
GLP compliance:
no
Type of method:
ring method
Surface tension:
36.4 mN/m
Temp.:
20 °C
Conc.:
1 000 mg/L

Details:

Water calibration:

Water calibration: Temp. = 20 °C, density = 0.998 g/cm3

Surface tension of purified water, mN/m

Value 1

71.5

Value 2

71.8

Value 3

71.7

Value 4

71.7

Value 5

71.7

Value 6

71.6

Arithmetic mean

 71.7

Standard deviation

 0.1

Arithmetic mean 71.7 mN/m, standard deviation 0.1 mN/m from the last 6 measurements (theoretical value: 72.6 mN/m →correction factor 1.0126)

First test solution

(c = 1102 mg/L), Temp. = 20 °C, density = 0.998 g/cm3, age of solution = 2640 min)

Surface tension of solution 1, mN/m

Value 1

36.1

Value 2

36.1

Value 3

36.1

Value 4

36.1

Value 5

36.1

Value 6

36.1

 Arithmetic mean  36.1
 Standard deviation  0.0

Arithmetic mean 36.1 mN/m, standard deviation 0.0 mN/m from 6 measurements

Second test solution

 (c = 1091 mg/L), Temp. = 20 °C, density = 0.998 g/cm3, age of solution = 3000 min)

Surface tension of solution 2, mN/m

Value 1

35.7

Value 2

35.7

Value 3

35.7

Value 4

35.7

Value 5

35.7

Value 6

35.7

 Arithmetic mean  35.7
 Standard deviation  0.0

Arithmetic mean 35.7 mN/m, standard deviation 0.0 mN/m from 6 measurements

Arithmentic mean of two test solutions:                    35.9 mN/m (+ 0.3 mN/m)

Arithmetic mean corrected by calibration factor

determined via water calibration:                            36.4 mN/m

Description of key information

36.4 mN/m at 20 °C and concentration 1 g/L (EU A.5)

Key value for chemical safety assessment

Surface tension:
36.4
in mN/m at 20°C and concentration in mg/L:
1 000

Additional information

The substance is surface active.