Citric acid

Citric acid (CA), CAS No.77-92-9, molecular formula C ₆H₈O₇, is an important organic weak acid. It is a colorless crystal, odorless, easily soluble in water, and the solution appears acidic. In biochemistry, it is an intermediate in the citric acid cycle (tricarboxylic acid cycle), which occurs in the metabolism of all aerobic organisms. Citric acid is widely used as an acidity regulator, seasoning agent, and chelating agent.