Ferric ammonium citrate (FAC), also known as ferric ammonium citrate scales or ferric ammonium citrate trihydrate exhibits interesting physical and chemical properties. It is a water-soluble coordination complex with the chemical formula FeC6H5O7(NH4)3•xH2O (where x can vary between 3 and 4). It comes in two forms: a reddish-brown to garnet red and a thin, transparent green, both existing as scales, granules, or powder [1]. Both possess a faint ammonia odor and hygroscopic nature, readily absorbing moisture from the air [1, 2].

The brown form tends to be more granular, while the green form can be scale-like or powdery [2]. Despite the color variation, their chemical composition is similar, containing iron (Fe³⁺), ammonium (NH₄⁺), and citrate (C₆H₅O₇³⁻) ions in a complex structure [2, 3]. The exact formula remains elusive, but it’s generally represented as C₆H₁₁FeNO₇³⁺. The key difference lies in the iron and citric acid content, with the brown form having slightly more iron and the green form boasting a higher citric acid concentration [2, 3].

This intricate interplay between its physical and chemical makeup contributes to FAC’s diverse applications in various fields. As a leading API manufacturer, WBCIL prioritizes strict CGMP and ISO quality control measures throughout the production process. The prolonged experience from 1962 ensures consistent potency, purity, and safety in every dose of WBCIL’s Ferric ammonium citrate.

Ferric Ammonium Citrate has the chemical formula: C6H11FeNO7+3 and molecular weight of ferric ammonium citrate is 265.00 g/mol.