Sodium Formate
The short version
The sodium salt of formic acid — a niche preservative paired with E236.
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 neutralizing formic acid (E236) with sodium hydroxide or carbonate. A byproduct of the formic-acid industry.
How it's used
Limited food use as a niche EU-permitted preservative; the dominant use is in livestock-feed silage preservation and leather processing. Largely interchangeable with sodium acetate in formulation when present.
Safety profile
ADI of 0–3 mg/kg body weight (combined formates, as formic acid). Same metabolic concerns as formic acid; the salt is gentler to handle but the dietary fate is identical.
Physical & chemical properties
White hygroscopic crystalline powder. Very soluble in water.
Regulation worldwide
Permitted in the EU for specific applications. Not approved as a direct food preservative in the US.
Educational information only. Not medical or dietary advice.