E238 – Formic acid calcium salt
PreservativeDescription
Calcium diformate
Notes
Calcium formate is the calcium salt of formic acid, produced by combining formic acid with calcium hydroxide (lime) or calcium carbonate (chalk). This neutralization reaction creates a white, crystalline powder that's more stable and easier to use in food applications than liquid formic acid. The calcium component comes from natural limestone sources, while the formic acid portion is typically produced synthetically through industrial chemical processes. This additive functions as a preservative by creating acidic conditions that inhibit the growth of bacteria and mold in food products. It's commonly used in animal feed, bakery products, and some processed foods where both preservation and calcium fortification might be desired. In baking, it can also act as a dough conditioner, helping improve texture and extending the shelf life of bread and other baked goods. Calcium formate is synthetically manufactured, though it breaks down into calcium and formic acid - both of which occur naturally in various forms. It's suitable for vegetarians and vegans since no animal-derived ingredients are used in its production. Unlike sodium-based preservatives, it doesn't contribute to sodium intake, which may be preferable for people monitoring their salt consumption. The additive provides a small amount of calcium, though it's not used in quantities that would significantly impact daily calcium needs. It's approved for use by major food safety authorities worldwide.