Calcium ascorbate

Calcium ascorbate (CAS 5743-27-1), also known by its food additive designation E302, is a calcium salt form of vitamin C used as an antioxidant and stabilizer across food, pharmaceutical, and personal care manufacturing.

It delivers the functional benefits of ascorbic acid while introducing a buffered, non-acidic profile. This suits formulations where pH sensitivity is a concern for the manufacturer or the end consumer.

In food and beverage production, E302 prevents oxidative discoloration and rancidity in products ranging from fruit preparations and canned vegetables to processed meats and dairy blends.

Supplement manufacturers use it as a dual-function ingredient, contributing both vitamin C content and calcium to tablet, capsule, and powder formulations without the acidity of standard ascorbic acid.

Cosmetic and personal care formulators incorporate it into serums, creams, and topical preparations where antioxidant protection and skin-brightening activity are required alongside formulation stability.

In pharmaceutical applications, it functions as an excipient and active ingredient in effervescent tablets and nutritional preparations. It is supplied as a white crystalline powder in both anhydrous and dihydrate forms.

Standard grades include food-grade (FCC), USP, and Ph. Eur., supporting compliance across regulated markets. Packaging typically ranges from kilogram-scale bags to bulk quantities for industrial procurement.