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Prussian blue insoluble capsules contain insoluble ferric hexacyanoferrate(II), with an empirical formula of Fe [Fe(CN) ] and a molecular weight of 859.3 Daltons. It is provided as 0.5 gram 4 63 of Prussian blue powder in gelatin capsules with 0 – 38 mg of microcrystalline cellulose. The dark blue capsules are imprinted with the light blue inscription: PB. The powder may vary from uniformly fine, dark granules to coarse light and dark-colored granules. The structural formula for Prussian blue insoluble is shown below.

The crystal structure of Prussian blue is a cubic lattice with the Fe and Fe atoms occupying the corners of the cube and the cyanide groups positioned on the sides.

Last reviewed on RxList: 10/1/2008
This monograph has been modified to include the generic and brand name in many instances.