Zinc methionine sulfate

CAS 56329-42-1

Zinc methionine sulfate is a zinc source in which the mineral is bound to an amino acid, a form intended to be absorbed more readily than a simple zinc salt.

Where it is and isn’t permitted

Status of Zinc methionine sulfate by jurisdiction. Every jurisdiction this site covers is listed, including those where the substance does not appear.
JurisdictionStatusScope and limitsCitation
United StatesFood and Drug AdministrationPermitted, with conditions21 CFR 172.399retrieved 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

Made by complexing a zinc salt with methionine, which is produced synthetically or by fermentation.

  • Vegan
  • Vegetarian
CAS registry number
56329-42-1
InChIKey
ROUREIAZUKQVBD-FHNDMYTFSA-L
PubChem
CID 22849947

Every name it appears under

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

CAS registry number

  • 56329-42-1

As it appears in regulation

  • Zinc methionine sulfate

Other names

  • (L-Methioninato-N,O,S) hydrogen (sulfato(2)-O) zincate(1-), (T-4)-
  • Zinc mono-L-methionine sulphate
  • ZIO23CX10K

Systematic names

  • zinc(2+) ion 2-amino-4-(methylsulfanyl)butanoic acid sulfate

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/zinc-methionine-sulfate.json