Vol . 70 No . 4 July/August 2019 JOURNAL OF COSMETIC SCIENCE The Official Journal of the Society of Cosmetic Chemists Contents Page ORIGINAL ARTICLES Simultaneous Determination of Nine Sunscreen Agents by HPLC and Chemometric Analysis Fatemeh Moraffah, Hanieh Adli, Akram Rostami, Mohammad R. Khoshayand, Mohsen Amini, Zeinab Pourjabbar, Sareh Kargar, Naficeh Sadeghi, and Mannan Hajimahmoodi . . . . . . . . 167 Disparate SPF Testing Methodologies Generate Similar SPFs. II. Analysis of P2 Standard Control SPF Data Melannie Alejandria, Andrew Marra, Glenn Roberts, and Michael Caswell . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 181 Influence of Sex Ratio and Density on the Comparative Repellency of IR3535® Against Caged Aedes, Anopheles and Culex Mosquitoes Silvana Kitadai Nakayama, Rüediger Graf, Anja-Martina Bohlmann, Jutta ZurLage, Howard Epstein, Márcia R.T. de Camargo Ranzani, and Frank Pflüecker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 197 Direct Analysis of Dimethicone in Aqueous Emulsions by Infrared Spectroscopy Edward B. Walker and Chase S. Naisbitt . . . . . . . . . . . . . . . . . . . . . . 209