Hydrated Lime having higher percentage of Calcium Hydroxide (+90%) over low grade (65% Purity)Hydrated Lime : 1) REDUCED REACTION TIME : The rate of chemical reaction depends upon the degree of purity of the Chemical being used. Higher the purity , lesser would be the reaction time . 2) REDUCED CONSUMPTION : By Quantitative Analysis it is established that 1 M.T. of 90% grade Hydrated Lime is equivalent to 1.378 M.T. of 65% purity Grade . Thus there is a reduction of 37.8% in consumption.