1 "Supporting Information" Solvation Thermodynamic Parameters for Alkyl Benzyl Dimethyl Ammonium Chloride and Cetyl Trimethyl Ammonium Chloride Surfactants in Water and Alcoholic-Water Solvents Farid I. El-Dossoki * , Esam A. Gomaa 1 and Osama K. Hamza 2 Chemistry Department, Faculty of Science, Port-Said University, Port-Said, Egypt * Corresponding author: Feldossoki64@sci.psu.edu.eg 1 Chemistry Department, Faculty of Science, Mansoura University, Mansoura, Egypt 2 Egyphar company for pharmaceutical drugs, Cairo, Egypt