... , acetone and ethyl acetate. 5.Specification: Comply strictly with China national standard of GB5308-85. 6.Technical data: Purity % ... , sulfanilamide medicine; extract gallic acid and pyrogallol in chemical industry. mud treater in petroleum drilling; furthermore, it ... are widely used in medical, chemical, food, printing & dyeing, astronavigation and national defense and micro-electronics areas, ...