Chromium propionate, as an animal feed supplement, is created employing chromium carbonate and propionic acid as starting materials. A quantity of chromium carbonate is dissolved into water and propionic acid is stirred in to this, followed by calcium oxide. The propionic acid reacts with the chromium carbonate to form chromium propionate. The calcium oxide minimizes the hygroscopic nature of the finished product, to prevent caking and lumping. The chromium propionate appears as a precipitate, which is dried and can be centrifuged to drive out excess propionic acid. The dried precipitate is delumped and ground to a desired particle size. The end product has a minimum of 10% active bio-available chromium(III) content.
