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Manganese gluconate

Manganese gluconate suppliers and sourcing guide

Manganese gluconate is the manganese (II) salt of gluconic acid, usually sold as the dihydrate. It is made by reacting manganese carbonate with gluconic acid in water and then crystallizing the product, giving a slightly pink powder that dissolves in water and contains roughly 11% manganese. Brands buy it as powder for premixes, tablets and drink mixes, or as a diluted trituration.

See suppliersWhat to ask for on the COA
Also known as
Manganese (II) gluconate · Manganese gluconate dihydrate · Manganous gluconate
Facts checked
November 2026

Forms and grades of manganese gluconate

Suppliers sell different products under the same name. Specify the one you need.

  • Dihydrate powder

    The standard USP or FCC grade.

  • Granulated

    Granules for direct compression on tablet presses.

  • Triturations and premixes

    Diluted or blended grades with a stated manganese level.

What to check on the COA

Compare each result with your own specification when the lot arrives.

Assay
Manganese gluconate on the dried basis by complexometric (EDTA) titration, against the USP or Food Chemicals Codex specification.
Reducing substances
A limit test for reducing sugars from the gluconate.
Loss on drying
Water content consistent with the dihydrate.
Chloride and sulfate
Limit tests for process impurities.
Lead and other metals
Lead, arsenic, cadmium and mercury by ICP-MS.

Storage, lots and expiry

Storage and shelf life

Store manganese gluconate in tightly closed containers in a cool, dry place away from moisture. It is stable under normal storage but can cake if packs are left open. Shelf life is set by the supplier's specification, with assay and moisture the usual retest checks.

Lots and expiry dates

Record the assay and moisture for each lot and calculate the manganese dose from the actual result. Keep powder, granular and diluted grades on separate item codes.

Regulatory status

Facts from regulators and standards bodies, each linked to its source.

  • 21 CFR 184.1452 affirms manganese gluconate as GRAS as a nutrient supplement in listed food categories, including baked goods, nonalcoholic beverages, dairy product analogs and fish, meat, milk and poultry products.

    Source: ecfr.gov (opens in a new tab)

  • Health Canada's Multi-Vitamin/Mineral Supplements monograph for natural health products lists manganese (II) gluconate and its dihydrate among the source ingredients for manganese (Table 2).

    Source: webprod.hc-sc.gc.ca (opens in a new tab)

  • 21 CFR 101.9(c)(8)(iv) sets the Reference Daily Intake for manganese at 2.3 mg for adults and children 4 years and older.

    Source: ecfr.gov (opens in a new tab)

This is general information, not regulatory advice. Status differs by country and by how the ingredient is used, so check the rules for your product and market.

Manganese gluconate suppliers

Manufacturers and distributors whose own websites say they sell it.

We are checking manganese gluconate suppliers now

Every listing is checked against the supplier’s own website before it goes live, so this list fills in over the coming weeks. The specs and COA checklist above are ready today.

Sell manganese gluconate? Request a listing

Frequently asked questions

What forms of manganese gluconate can brands buy?

Common forms include dihydrate powder, granulated and triturations and premixes. Ask each supplier for the specification sheet of the exact grade they quote.

What should the COA for manganese gluconate include?

Expect assay, reducing substances, loss on drying, chloride and sulfate and lead and other metals, each with its method, specification and result for that lot.

How should manganese gluconate be stored?

Store manganese gluconate in tightly closed containers in a cool, dry place away from moisture. It is stable under normal storage but can cake if packs are left open. Shelf life is set by the supplier's specification, with assay and moisture the usual retest checks.

What is the regulatory status of manganese gluconate?

21 CFR 184.1452 affirms manganese gluconate as GRAS as a nutrient supplement in listed food categories, including baked goods, nonalcoholic beverages, dairy product analogs and fish, meat, milk and poultry products. Health Canada's Multi-Vitamin/Mineral Supplements monograph for natural health products lists manganese (II) gluconate and its dihydrate among the source ingredients for manganese (Table 2). 21 CFR 101.9(c)(8)(iv) sets the Reference Daily Intake for manganese at 2.3 mg for adults and children 4 years and older.

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