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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:
19 Feb 2009
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
test procedure in accordance with national standard methods with acceptable restrictions
Qualifier:
according to guideline
Guideline:
other: DIN EN 14370 ''Surface Active Agents - Determination of Surface Tension''
GLP compliance:
no
Type of method:
ring method
Surface tension:
33 mN/m
Temp.:
25 °C
Conc.:
721 mg/L

Two measurements with 6 points for calculation of standard deviationn for each were performed:

 

Measurement 1

Measurement 1

Concentration (mg/l)

1000.5

999.9

Total no. of points

6

6

Standard deviation (mN/m)

0.04

0.09

Surface tension (Zuidema-Waters) (mN/m)

33.39

33.40

Average value of two measurements (mN/m)

33.4

Description of key information

The surface tension is 33.4 mN/m at 25 °C (c = 721 mg/L, DIN EN 14370).

Key value for chemical safety assessment

Surface tension:
33.4
in mN/m at 20°C and concentration in mg/L:
721

Additional information

The value for surface tension is taken from company data.