... /BAG. “CHANG” BRAND AMMONIUM BICARBONATE FOOD GRADE, MAINLY AS SPONGING AGENT USE FOR BAKING FOODS SUCH AS CRISP CAKE, BISCUIT ETC ... , IT ALSO WIDELY USED IN CHEMICAL FIELD SUCH AS FLOUR BRIGHTENING AGENT, RARE EARTH DEEP PROCESSING, MEDICINE MIDBODY, PLASTICS PROCESSING, ELECTRONIC ELEMENT ...