Manganese Gluconate
CAS No: 6485-39-8
Molecular Formula: C₁₂H₂₂MnO₁₄
Molecular Weight: 445.23 g/mol
1. Product Description
Manganese gluconate is the manganese salt of gluconic acid. It appears as a pale pink to beige crystalline or granular powder. It is freely soluble in water, practically insoluble in alcohol, and is widely used as a highly bioavailable source of manganese in nutritional supplements, fortified foods, beverages, and pharmaceutical preparations.
2. Specifications – Food / Nutraceutical / Pharma Grade
| Item | Specification / Typical Value | Notes |
|---|
| Appearance | Pale pink to beige crystalline or granular powder | Visual inspection |
| Identification | Positive for manganese and gluconate | USP / FCC methods |
| Assay (C₁₂H₂₂MnO₁₄) | 98.0 – 102.0 % (on anhydrous basis) | Titrimetric / HPLC |
| Manganese Content | 10.0 – 12.0 % | ICP / AAS |
| Loss on Drying (105 °C) | ≤ 10.0 % | USP |
| pH (10 % solution) | 4.0 – 6.0 | 25 °C |
| Chloride (Cl⁻) | ≤ 0.05 % | USP |
| Sulfate (SO₄²⁻) | ≤ 0.05 % | USP |
| Reducing Substances | ≤ 1.0 % | USP |
| Water-Insoluble Matter | ≤ 0.1 % | Filtration |
| Lead (Pb) | ≤ 2 ppm | ICP |
| Arsenic (As) | ≤ 3 ppm | ICP |
| Cadmium (Cd) | ≤ 1 ppm | ICP |
| Mercury (Hg) | ≤ 1 ppm | ICP |
| Heavy Metals (as Pb) | ≤ 10 ppm | USP <231> |
| Microbiological Limits | Total Plate Count ≤ 10³ cfu/g; Yeast & Mold ≤ 10² cfu/g; E. coli negative | ISO / USP |
| Solubility | Freely soluble in water, clear solution | FCC |
3. Typical Applications
Dietary Supplements: Capsules, tablets, powders
Food Fortification: Beverages, infant formula, fortified cereals
Pharmaceuticals: Trace mineral replacement therapy, clinical nutrition
Research & Biochemicals: Manganese source in biochemical assays
4. Physical & Chemical Properties
Appearance: Pinkish to beige powder
Taste: Slight metallic taste, mildly sweet
Solubility: Freely soluble in water, forming a clear solution
Stability: Stable under recommended storage conditions; hygroscopicity is low
5. Storage & Handling
Store in a cool, dry, well-ventilated area
Keep container tightly sealed to avoid moisture uptake
Protect from excessive heat, sunlight, and contamination
Follow GMP / HACCP for food-grade handling
6. Packaging
25 kg fiber drums or multi-layer paper bags with inner polyethylene liner
Smaller packaging (1–5 kg) available for R&D and specialty applications
For more information, please visit this website:https://www.khonorchem.com
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