1). Citric Acid Monohydrate 2). CAS:5949-29-1 3). Good price&quality 4). White crystalline powder Citric acid is a weak organic acid. It is a natural preservative/conservative and is also used to add an acidic, or sour, taste to foods and soft drinks. In biochemistry, the conjugate base of citric acid, citrate, is important as an intermediate in the citric acid cycle, and therefore occurs in the ...