Abstract
The method to quantify p-hydroxybenzoates in cosmetics was studied.
In this experiment, the use of silica gel with 10% gypsum as thin layer, chloroform-isopropanol-N/10 potasium hydroxide (80:5:5) as solvent and myron reagent as indicator resuled in success.
By this method, we were not only able to determine the approximate quantity of whole p-hydroxybenzoates in cosmetics but to confirm the existence of these preservatives in o/w, w/o type emulsion or toilet water.
It can be considered that this method is useful on the quality control for the antisepsis.
