Ascorbic acid is a quick-acting and powerful antioxidant that is used in white winemaking to protect against light and short aerations, such as racking and bottling. Use in the treatment of disulfide odors, and as an antioxidant on grapes. It works by rapidly converting dissolved oxygen into hydrogen peroxide before it has a chance to react with oxidative enzymes and cause browning. Formulated especially for winemaking. Also available at savings in the one pound pack, see our other items. Made in USA.