... , but not in organic solution. Solidified in moist air. Uses: Used as water treatment chemicals of boiler, acidity buffer, detergent, and auxiliary ... , and electroplating etc. It is mainly used as quality improver, buffer, emulsifier, and nourish-supplement agent etc. in food industry. It ... %≥ 58.0 58.0 44.6 44.6 3 PH (1% solution) 4.2-4.8 4.2-4.8 4.2 ...