Detection and Estimation of Cane Sugar in pasteurized Milk by Modified Seliwanoff Method Knowledge February 24, 2016September 21, 20180 Principle Fructose formed in cane sugar reacts with resorcinol in the presence of hydrochloric acid to give red color. Reagent Dissolve 1.0 g of resorcinol in 100 ml hydrochloric acid (1:1.5) 1