That is the reason why we investigated the volumetric proper-ties of the aqueous solutions of the CTAB and TX-100 mixture witha short-chain alcohol. These surfactants have a wide applicationin everyday life, industrial processes and laboratories. As a short-chain alcohol we took ethanol because the mixed water+ethanolsolvents are of major importance and they are necessary ingredi-ents in many cosmetics, cleaning agents or drugs. We measuredthe surface tension, density, dynamic viscosity and specific con-ductivity of these solutions. Moreover, in the range of surfactantand alcohol concentration in which we expected the association oftheir molecules we measured the dynamic light scattering of these solutions and based on these measurements we obtained the sizeof molecular aggregates.