E573 – Aluminium stearate

Description

Fine, white powder, metallic taste

Risks

Notes

Aluminium stearate is a fine white powder made by combining aluminium (a lightweight metal) with stearic acid, which is a fatty acid commonly found in animal fats and some plant oils like cocoa butter. Think of it as soap-making in reverse – instead of breaking down fats, manufacturers combine the metal with the fatty acid to create this powdery compound. The process involves mixing aluminium salts with stearic acid under controlled conditions to form this stable, water-repelling powder. This additive works as an anticaking agent, which means its job is to keep powdered foods flowing freely instead of clumping together into hard lumps. You'll commonly find it in powdered spices, seasoning mixes, powdered soups, and some pharmaceutical tablets. It acts like tiny invisible balls between particles, preventing them from sticking to each other when exposed to moisture or during storage. Aluminium stearate is a synthetic compound created specifically for industrial use. It's suitable for vegetarians and vegans when the stearic acid component comes from plant sources, though the source isn't always clearly labeled. There are no specific allergen concerns, and it's generally recognized as safe by food regulators when used in small amounts, though some consumers prefer to limit aluminium-containing additives in their diet as a personal choice.