Calcium Formate
The short version
The calcium salt of formic acid — niche food use, dominant role is in livestock feed.
It's permitted and generally considered safe, but there are a few reasons to be mindful — like sensitivities in some people, debated studies, or intake limits. The Safety section below explains the specifics.
Where it comes from
Produced by reacting formic acid with calcium carbonate or hydroxide. A byproduct of pentaerythritol manufacture is the dominant industrial source.
How it's used
The majority of production goes to livestock feed (silage and piglet diet acidifier). Food use is restricted to specific niche applications in the EU. Functions as a mild preservative and calcium source where formate residue is acceptable.
Safety profile
ADI of 0–3 mg/kg body weight (combined formates, as formic acid). Hydrolyzes in the gut to formate and calcium — both metabolized normally. Same metabolic concerns as formic acid; calcium is the only added consideration.
Physical & chemical properties
White crystalline powder. Soluble in water. Hygroscopic.
Regulation worldwide
Permitted in the EU for specific applications. Not approved as a direct food preservative in most other jurisdictions.
Educational information only. Not medical or dietary advice.