Registration Dossier

Physical & Chemical properties

Water solubility

Currently viewing:

Administrative data

Link to relevant study record(s)

Description of key information

Water solubility determined as critical micelle concentration:
7.8±1.5 g/L (at 20 °C / pH 9.9) based on the UVCB substance
5.2±1.0 g/L (at 20 °C / pH 9.9) based on active content (67.3 % disodium lauroyl glutamate)

Key value for chemical safety assessment

Water solubility:
7.8 g/L
at the temperature of:
20 °C

Additional information

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 4311.

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.