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EC number: 303-161-8 | CAS number: 94158-87-9
An aqueous solution of the test item in de-ionized water with a concentration of 999.6 mg/lwas prepared and stirred for ~ 21 h. After adapting to 20 °C the measurement of the surface tension with the test item was carried out at 20 ±0.5°C (19.9 °C), as follows:
The solution to be measured was transferred to the measurement vessel, taking care to avoid foaming. The measurement vessel was placed on the table of the test apparatus. The measurement vessel was raised until the ring was immersed below the surface of the solution. The time from starting the measurement was recorded (see Table1 below). Subsequently, the table top was lowered gradually and evenly at a rate of 0.3 cm/min to detach the ring from the surface until the maximum force was reached. The force was read on the tensiometer. The measurements were repeated until 6 measurements werewithin the limits of the stability criterion.
Table1: Surface tension
s(mN/m) corrected according to Zuidema and Waters
Due to the fact that the surface tension showed a time-dependence no mean value could be reported. However, the surface tension was higher than 60 mN/m, the test item had no surface-active properties.
Zuidema, H., Waters, C.W.,Ind. Eng.Chem. Analyt.13 (1941), S. 312
The surface tension of the aqueous solution at 20 °C was higher than 60 mN/m. The test item had no surface-active properties.
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