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EC number: 701-196-7
CAS number: -
Water calibration: temp.= 26 degrees C,
density = 0.997 g/cm3
Surface tension of purified water
Value 1: 71.4 mN/m
Value 2: 71.4 mN/m
Value 3: 71.4 mN/m
Value 4: 71.4 mN/m
Value 5: 71.4 mN/m
Value 6: 71 .5 mN/m
Arithmetic mean value: 71.4 mN/m; standard
deviation: 0.1 mN/m (theoretical value: 71,6 mN/m, resulting a
correction factor of 1.0028)
First test solution: (conc. =277 mg/L),
temp.= 22 degrees C, density = 0.997 g/cm3; age of solution = 54 min.
Surface tension of solution 1
Value 1: 30.5 mN/m
Value 2: 30.5 mN/m
Value 3: 30.1 mN/m
Value 4: 29.9 mN/m
Value 5: 29.2 mN/m
Value 6: 29.6 mN/m
Arithmetic mean value: 30.0 mN/m;
standard deviation 0.5 mN/m
Second test solution: (conc.=239 mg/L),
temp.= 22 degrees C, density = 0.997 g/cm3; age of solution = 61 min.
Surface tension of solution 2
Value 2: 29.9 mN/m
Value 3: 29.6 mN/m
Value 4: 29.4 mN/m
Value 5: 29.6 mN/m
Value 6: 29.3 mN/m
Arithmetic mean value: 29.7 mN/m;
standard deviation 0.4 mN/m.
By adjusting the temperature setting of the
tensiometer, differences in the density of the liquid can be compensated
Arithmetic mean of two test solutions: 29.85
mN/m (+/- 0.21 mN/m)
Arithmetic mean value corrected by
calibration factor determined via water calibration: 29.9 mN/m
The surface tension of an aqueous test substance solution at ca. 250 mg/L was found to be 29.9 mN/m at 20°C. Because the surface tension is < 60 mN/m, the substance is regarded to be surface active.
Determined in a study performed in
accordance with OECD 115, using the ring method.
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