Citric acid is a colorless, water-soluble carboxylic acid, leading to the fruit acids counts. In addition to the anhydrous variant, the citric acid exists monohydrate (C6H8O7·H2O), which is a molecule per molecule Citric acid crystal water contains.
C 2334 (OTTO) Citric acid, monohydrate for HPLC, 99%+ Cas 5949-29-1 - used as an acidifier, a flavoring agent and a chelating agent.