Ferric Ammonium Citrate (Brown), Extra Pure

Ammonium Ferric Citrate (Brown), Extra Pure is an iron-containing compound used in pharmaceutical and chemical applications. It is also associated with blueprint preparation, where its light-sensitive iron chemistry has historically been used in photographic and copying processes. The brown grade has defined physical and chemical characteristics that support its identification and quality evaluation. The material is supplied as a brown-coloured powder. It is described as a yellowish-brown to red solid with a faint ammonia-like odour. Ammonium ferric citrate is soluble in water, allowing it to be incorporated into aqueous preparations and solutions where its iron-containing components are required.

The compound contains iron in the iron(III) oxidation state, along with ammonium and citrate components. Its chemical behaviour makes it relevant to applications involving iron-containing solutions and reactions. Understanding its composition is also useful when considering why the material has a characteristic colour and why its iron content is an important quality parameter. One of its established applications is in medicine, where ammonium ferric citrate has been used in preparations involving iron. It has also been used in making blueprints, demonstrating an application based on the chemical behaviour of iron compounds under controlled conditions.

The Extra Pure grade has established definitions for a number of chemical parameters. The assay, calculated as iron (Fe), is specified at 20.5-23.0%. The range defines the expected iron content of the material and is an important parameter for quality assessment. The specified chloride content shall not exceed 0.05% and sulphate not to exceed 0.1%. These impurity limits determine the chemical composition of the delivered material. It is water soluble and thus relatively easy to prepare solutions when needed for a suitable application. However, the exact preparation procedure and the concentration should be determined according to the needs of the intended use.

Ammonium Ferric Citrate (Brown), Extra Pure is to be stored and handled as per relevant product documentation and laboratory procedures. Proper handling helps preserve the material properties and avoids contamination during use. Its controlled iron content, specified impurity limits, water solubility and appearance are the characteristics that identify it as a chemical reagent for uses where ammonium ferric citrate (brown) is required.