Ferrous carbonate

CAS 563-71-3

Ferrous carbonate is an iron source used in fortification, sometimes as the stabilised form.

Where it is and isn’t permitted

Status of Ferrous carbonate by jurisdiction. Every jurisdiction this site covers is listed, including those where the substance does not appear.
JurisdictionStatusScope and limitsCitation
United StatesFood and Drug AdministrationPermitted21 CFR 184.1307bretrieved 2026-09-07
Codex AlimentariusCodex Alimentarius Commission / JECFANot listedDoes not appear on this jurisdiction’s permitted list. That is not the same as being prohibited.

What it is made from

Precipitated by reacting an iron salt with a carbonate.

  • Vegan
  • Vegetarian
CAS registry number
563-71-3
InChIKey
RAQDACVRFCEPDA-UHFFFAOYSA-L
PubChem
CID 11248

Every name it appears under

18 recorded names. A label may use any of them.

CAS registry number

  • 563-71-3

As it appears in regulation

  • Ferrous carbonate

Other names

  • Blaud's mass
  • Carbonic acid, iron(2+) salt (1:1)
  • CFeO3
  • Ferronil
  • Ferrous carbonate
  • Ferrous monocarbonate
  • Ferrum carbonicum
  • HSDB 458
  • Iron carbonate (FeCO3)
  • Iron II carbonate
  • Iron(2+) carbonate
  • Iron(II) carbonate (FeCO3)
  • Iron(II) carbonate, tech. gr. (Siderite)
  • RAQDACVRFCEPDA-UHFFFAOYSA-L

Systematic names

  • Ferrous Carbonate; Ferrous Monocarbonate; Iron Carbonate (FeCO3); Iron(2+) Carbonate; Iron(II) Carbonate;
  • iron(2+);carbonate

Hazard reference values

No reference value for this substance in the sources we hold.

Evidence and how bodies read it

Studies, and the differing conclusions regulators drew from them, are curated by hand rather than machine-read, and none has been written for this substance yet.

Sources for this page

  • ecfr retrieved 2026-09-07

Full licence terms and publisher details on Sources. How this page is built and updated: Method.

Machine-readable:/api/v1/additives/ferrous-carbonate.json