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Co‐surfactant, co‐solvent, and hydrotropic properties of some common cooling agents
- Larcinese‐Hafner, Valeria, Tchakalova, Vera
- Flavour and fragrance journal 2018 v.33 no.4 pp. 303-312
- aqueous solutions, ingredients, sensation, surfactants, water solubility
- Cooling agents are small organic molecules known to evoke a sensation of cold by interaction with the transient receptor. In the present study, we demonstrate experimentally that some cooling agents could behave as hydrotropes in aqueous solutions in the absence of surfactants, and also as co‐surfactants/co‐solvents in aqueous solutions in the presence of a surfactant forming an interfacial film. The hydrotropy and co‐surfactancy/co‐solvency effect depends strongly on the type of perfumery ingredient. The hydrotrope concentration, the concentration at which the water solubility of the perfumery compound is enhanced, is surprisingly low, in the mmol/L range.