L-Ascorbic Acid (Vitamin C) is a water-soluble vitamin that is essential for growth and repair of tissue. This certified solution standard is suitable for use as starting material in the preparation of linearity standards, calibrators, or controls in HPLC /UV or electrochemical (EC) L-ascorbic acid clinical or dietary supplement testing applications. Clinical testing of L-ascorbic acid levels is performed to evaluate vitamin C deficiency.