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EC number: 701-162-1
CAS number: -
According to OECD105 study the water solubility of Penta-PSCA is 0.23 g/L at 20°C.According to ISO 4311 the critical micelle concentration of Penta-PSCA is 0.23 ± 0.11 g/L at 20°C. The critical micelle concentration is the appropriate parameter describing water solubility of surface active materials.
The critical micelle concentration of the test item was determined from
a plot of surface tension versus concentration of the test item in water
in a well reported study according to national testing guideline DIN ISO
Surfactants show a complex solubility behaviour due to aggregation. The
monomer concentration, and hence the thermodynamic activity, reaches a
limiting value at the crirical micelle concentration. It remains
approximately constant as the total concentration is further increased.
For ecotoxicological models requiring a solubility value, the critical
micelle concentration is therefore the appropriate parameter describing
water solubility of surface active materials.
According to ISO 4311 the critical micelle concentration of Penta-PSCA
is 0.23 ± 0.11 g/L at 20°C.
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