Manganese sulfate
Manganese sulfate suppliers and sourcing guide
Manganese sulfate is the manganese (II) salt of sulfuric acid, sold mainly as the monohydrate, a pale pink granular powder with about 32% manganese. It is made by reacting manganese compounds such as the oxide or carbonate with sulfuric acid, by treating manganese dioxide with sulfur dioxide, or as a byproduct of other chemical processes, then crystallizing and drying it. Brands buy food or USP grades for mineral premixes, tablets and fermentation media.
- Category
- Vitamins and minerals
- Also known as
- Manganese (II) sulfate monohydrate · Manganous sulfate · Manganese sulphate
- Facts checked
- November 2026
Forms and grades of manganese sulfate
Suppliers sell different products under the same name. Specify the one you need.
Monohydrate
The standard food and USP grade, a free-flowing pale pink powder.
Tetrahydrate
A more hydrated form with less manganese per gram, offered by some suppliers.
Triturations and premixes
Diluted or blended grades for even dosing in small amounts.
What to check on the COA
Compare each result with your own specification when the lot arrives.
- Assay
- Manganese sulfate content by complexometric titration, against the USP or Food Chemicals Codex specification.
- Loss on ignition
- Confirms the hydrate form.
- Substances not precipitated by ammonium sulfide
- A compendial limit test for other metal salts.
- Lead, arsenic and selenium
- Metals by ICP-MS against compendial or supplier limits.
Storage, lots and expiry
Storage and shelf life
Store manganese sulfate in tightly closed containers in a cool, dry place; it is stable but slightly hygroscopic and can cake. Keep food and feed grades physically separated. Shelf life is set by the supplier's specification, and aged stock is retested for assay and moisture.
Lots and expiry dates
Record the hydrate form and assay for each lot, and confirm the grade is food or USP rather than feed or fertilizer material. Note the manufacturing route the supplier declares, since the source process affects the impurity profile.
Regulatory status
Facts from regulators and standards bodies, each linked to its source.
21 CFR 184.1461 affirms manganese sulfate as GRAS as a nutrient supplement in listed food categories, and describes several manufacturing routes, including as a byproduct of hydroquinone manufacture.
Source: ecfr.gov (opens in a new tab)Health Canada permits manganese sulphate as an acidity regulator for bacterial cultures and as a yeast food in beer.
Source: canada.ca (opens in a new tab)Health Canada's Multi-Vitamin/Mineral Supplements monograph for natural health products lists manganese (II) sulfate and its monohydrate 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 sulfate suppliers
Manufacturers and distributors whose own websites say they sell it.
We are checking manganese sulfate 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 sulfate? Request a listingFrequently asked questions
What forms of manganese sulfate can brands buy?
Common forms include monohydrate, tetrahydrate and triturations and premixes. Ask each supplier for the specification sheet of the exact grade they quote.
What should the COA for manganese sulfate include?
Expect assay, loss on ignition, substances not precipitated by ammonium sulfide and lead, arsenic and selenium, each with its method, specification and result for that lot.
How should manganese sulfate be stored?
Store manganese sulfate in tightly closed containers in a cool, dry place; it is stable but slightly hygroscopic and can cake. Keep food and feed grades physically separated. Shelf life is set by the supplier's specification, and aged stock is retested for assay and moisture.
What is the regulatory status of manganese sulfate?
21 CFR 184.1461 affirms manganese sulfate as GRAS as a nutrient supplement in listed food categories, and describes several manufacturing routes, including as a byproduct of hydroquinone manufacture. Health Canada permits manganese sulphate as an acidity regulator for bacterial cultures and as a yeast food in beer. Health Canada's Multi-Vitamin/Mineral Supplements monograph for natural health products lists manganese (II) sulfate and its monohydrate 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.
More vitamins and minerals
- Magnesium GlycinateMagnesium bisglycinate · Magnesium bisglycinate chelate
- Vitamin CL-ascorbic acid · Ascorbic acid
- Vitamin D3Cholecalciferol · Colecalciferol
- ZincZinc citrate · Zinc gluconate
- Vitamin A palmitateRetinyl palmitate · Retinol palmitate
- Vitamin A acetateRetinyl acetate · Retinol acetate
- Beta-caroteneβ-Carotene · all-trans-beta-carotene
- Vitamin D2Ergocalciferol · Calciferol
- Vitamin E (d-alpha tocopherol)d-alpha-tocopherol · RRR-alpha-tocopherol
- Mixed tocopherolsTocopherols concentrate, mixed · Mixed tocopherol concentrate
- Vitamin K1Phylloquinone · Phytonadione
- Vitamin K2 (MK-7)Menaquinone-7 · MK-7
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