Zinc methionine sulfate
56329-42-1 · (L-Methioninato-N,O,S) hydrogen (sulfato(2)-O) zincate(1-), (T-4)- · Zinc mono-L-methionine sulphate · ZIO23CX10K · zinc(2+) ion 2-amino-4-(methylsulfanyl)butanoic acid sulfate · Zinc methionine sulfateCAS 56329-42-1
Listed as a nutrient supplement by the US.
Listed as nutrient supplements (US)
- United States: Nutrient supplement — FDA, Substances Added to Food: ZINC METHIONINE SULFATE
Zinc methionine sulfate is a zinc source for fortification, in which the mineral is bound to the amino acid methionine.
Where it is and isn’t permitted
| Jurisdiction | Status | Scope and limits | Citation |
|---|---|---|---|
| Australia and New Zealand | No listed food uses foundThis site has not matched this substance to any food use on this jurisdiction’s list of authorised food additives. A food additive may be used only in foods that list names. Flavourings, enzymes, processing aids and added nutrients are regulated separately and do not appear on it. | ||
| Canada | No listing matchedHealth Canada’s lists name additives without E or INS numbers, so this site matches them by exact name. A substance listed there under a name this site does not recognise has no row here. | ||
| European Union | No listed food uses foundThis site has not matched this substance to any food use on this jurisdiction’s list of authorised food additives. A food additive may be used only in foods that list names. Flavourings, enzymes, processing aids and added nutrients are regulated separately and do not appear on it. | ||
| Great Britain | No listed food uses foundThis site has not matched this substance to any food use on this jurisdiction’s list of authorised food additives. A food additive may be used only in foods that list names. Flavourings, enzymes, processing aids and added nutrients are regulated separately and do not appear on it. | ||
| Japan | No listing matchedThis site imports only Japan’s list of designated additives (Appended Table 1 to the Regulations for Enforcement of the Food Sanitation Act), matched by English name. Existing additives, natural flavouring agents and ordinary foods used as additives are permitted outside that list and are not imported, so an empty row does not show that Japan does not permit the substance. | ||
| South Korea | No listing matchedThis site imports Part III of South Korea’s Standards and Specifications for Food Additives, matched by CAS number, then INS number, then exact name. Mixed preparations and sanitisers are not imported, and an entry whose identifiers disagreed with a page’s is held for review, so an empty row does not show that South Korea does not permit the substance. | ||
| United States | Permitted, with conditions | 21 CFR 172.399retrieved 2026-10-17 | |
| Codex Alimentarius | Not listedDoes not appear on this jurisdiction’s permitted list. That is not the same as being prohibited. |
How much is permitted
A listing usually limits the quantity as well as the food. Only one of the forms that takes is a figure: quantum satis and good manufacturing practice permit the amount the technological effect requires and no more, which is a limit rather than the absence of one. Figures below are the range across every food category this page is listed in, and categories differ between regulators — see how much is permitted.
| United States | — | 1 no quantity stated |
|---|
No regulator sets a figure for Zinc methionine sulfate. That is not an absence of control: where the listing says quantum satis or good manufacturing practice, the quantity is limited to what the effect requires.
What it is made from
Made by complexing a zinc salt with methionine, which is produced synthetically or by fermentation.
- Vegan
- Vegetarian
Compare other additives on the dietary indexes.
- 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 rather than machine-read, and none has been written for this substance yet.
Common questions
Assembled from what is above, in the words the questions are usually asked in. Each answer is the same statement the relevant section makes, with the same citations behind it.
- What is Zinc methionine sulfate?
- Zinc methionine sulfate is a zinc source for fortification, in which the mineral is bound to the amino acid methionine.
- What is Zinc methionine sulfate used for in food?
- It is listed as a nutrient supplement — the role the US assigns it. This page shows every function each regulator records, with the citation for each.
- Is Zinc methionine sulfate banned in Europe?
- No. Zinc methionine sulfate is not on the EU's list of authorised food additives, but it would not be expected to be: every role regulators give it — nutrient supplement — the EU regulates under separate law. Its absence from the additives list says nothing about whether it is permitted in Europe.
- Where is Zinc methionine sulfate permitted?
- Of the seven regulators this site reads, the US permits it. Each permission is for named foods at named levels, not a blanket one; the table on this page gives them with citations.
- Is Zinc methionine sulfate vegan?
- Yes. Zinc methionine sulfate is not derived from animals, and is suitable for vegetarians. This page says what it is made from and how.
Sources for this page
- ecfr retrieved 2026-10-17
Full licence terms and publisher details on Sources. How this page is built and updated: Method.
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