E535 – Sodium ferrocyanide
StabiliserDescription
Synthetic coordination compound used as a highly effective anti-caking agent (flow improver) in crystalline food products, such as table salt and salt substitutes. It works by modifying crystal structure and preventing aggregation.
Notes
Sodium ferrocyanide is a synthetic compound made by combining sodium, iron, carbon, and nitrogen in a laboratory setting. Despite containing iron and cyanide in its chemical structure, it forms a very stable complex where these elements are tightly bound together, making it completely different from free cyanide (which is toxic). The manufacturing process creates bright yellow crystals that are then processed into a fine powder for food use. This additive works exclusively as an anticaking agent, and you'll find it almost entirely in table salt. Its job is to prevent salt crystals from sticking together and forming lumps, keeping your salt free-flowing even in humid conditions. It's particularly effective because it can absorb moisture while maintaining the salt's ability to pour easily from shakers and containers. Sodium ferrocyanide is entirely synthetic and suitable for both vegetarians and vegans since no animal products are involved in its production. While the name might sound scary due to the 'cyanide' part, food safety authorities have extensively tested it and confirmed it's safe at the tiny levels used in salt (typically less than 20 parts per million). The cyanide is locked into a stable molecular structure and doesn't break down under normal food storage or cooking conditions, making it harmless for consumption.