Ferrous Fumarate CAS 141-01-5

FAQ - Technical & Supply Chain

• Q:

  What is Ferrous Fumarate CAS 141-01-5?

  A: Ferrous Fumarate is the iron(II) salt of fumaric acid, with the molecular formula C4H2FeO4 and a molecular weight of about 169.90 g/mol. It is used as a solid, relatively stable source of iron in nutritional, supplement, and food-fortification formulations.
• Q:

  How much elemental iron does Ferrous Fumarate contain?

  A: The uncoated salt typically contains about 32-33% elemental iron, although specialty direct-compression, microencapsulated, or coated grades may have a lower declared iron content. Buyers should confirm the iron assay for the specific grade because it directly affects dosing and formulation calculations.
• Q:

  Why is Ferrous Fumarate selected for dry solid-dose formulations?

  A: It is practically insoluble in water, non-hygroscopic under normal handling, and relatively stable in dry systems, which helps reduce moisture-related interactions during blending and storage. These properties make it suitable for tablets, capsules, sachets, fortified powders, and mineral premixes where controlled iron delivery is required.
• Q:

  What are the main physical and solubility properties of Ferrous Fumarate?

  A: It is normally a fine reddish-orange to reddish-brown, odorless or nearly odorless powder. Ferrous Fumarate is slightly soluble to practically insoluble in water and very slightly soluble in ethanol, so it is usually dispersed in a dry or solid matrix rather than used as a simple aqueous solution.
• Q:

  What grades and specifications should be checked when sourcing Ferrous Fumarate?

  A: Common reference grades include USP, BP, Ph.Eur., and FCC, with the USP/FCC assay often in the range of 97.0-101.0%. The relevant specification should be chosen based on the target market and application, with particular attention to iron content, particle size, heavy metals, and the need for micronized or direct-compression grades.