... crystal powder 4. 25kg/bag, 25MT/20GP Citric Acid is mainly used as acidulant, flavouring agent, preservative ... be used as the antioxidant of grease. Citric acid monohydrate Product CharactersWhite Crystalline Powders, Colorless Crystals or ... , well-closed, dry and cool placeMain UsageCitric Acid is mainly used as acidulant,flavoring agent, preservative ... not more than 3. best price---citric acid