What is Magnesium Oxide Powder Bulk?
Kingsci Magnesium Oxide Powder Bulk is a quality raw material solution for global brand owners of bio-nutraceuticals, contract manufacturers, and dietary formulation experts, designed to deliver the best possible performance in large-scale commercial encapsulation, tablet compression, and functional food formulation. In a standardized inorganic mineral ingredient, formulated with a high level of physical stability, excellent flowability, and a tightly controlled bulk density, achieve the best elemental yield whilst using compact oral dosage forms without reducing blend uniformity or production speed. Our bulk powder is manufactured in state-of-the-art cGMP facilities and supported by extensive quality certifications such as ISO, Kosher, and Halal; it's tested for minimum heavy metal parameters, uniformity of microparticle morphology, and low storage and handling moisture absorption through a multi-stage chemical testing process. Its ability to act as a cost-efficient, highly stable mineral feedstock allows consumers to easily integrate consistent elemental magnesium into multi-nutrient complexes, ready-to-mix dietary powders, and daily wellness product lines, allowing for consistent, repeatable batch-to-batch product manufacturing. The ability to provide a scalable supply chain, enterprise procurement, complete regulatory documentation (COA, MSDS), and dedicated technical support, all of which fast-track product development and ensure long-term manufacturing continuity, is what Kingsci does.

COA
| Item | Specification | Result | Test Method |
| Appearance | White Fine Powder | White Fine Powder | Visual Inspection |
| Identification | Positive for Magnesium | Conforms | Chemical Identification |
| Magnesium Oxide (MgO), Ignited Basis | ≥ 98.0% | 98.60% | Complexometric Titration |
| Calcium Oxide (CaO) | ≤ 1.0% | 0.65% | ICP-OES |
| Elemental Magnesium Content | approximately 60.3% | Complies | ICP-OES |
| Iron (Fe) | ≤ 0.10% | 0.04% | ICP-OES |
| Chloride (Cl) | ≤ 0.10% | 0.05% | Argentometric Titration |
| Sulfate (SO₄) | ≤ 0.50% | 0.20% | Gravimetric / Turbidimetric Method |
| Acid-Insoluble Substances | ≤ 0.10% | 0.06% | Gravimetric Method |
| Loss on Ignition (LOI) | ≤ 5.0% | 3.20% | Gravimetric Method |
| Moisture / Loss on Drying | ≤ 2.0% | 0.80% | Gravimetric Method |
| Bulk Density | 0.20–0.60 g/cm³ | 0.38 g/cm³ | Bulk Density Test |
| Particle Size | ≥ 95% Passes 325 Mesh | 97.00% | Sieve Analysis |
Are you interested in our products? Just contact us directly or email donna.zh@kingsci.com to obtain further information and free samples.
Main Ingredients
The main active ingredient of Magnesium Oxide Powder is the inorganic elemental magnesium, which is bound in a dense, crystalline lattice structure (MgO), one of the highest concentrations of essential magnesium sources commercially available, and the theoretical active yield is about 60.3% elemental mass. This raw material is basic to the fundamental role it plays in the body as a dietary mineral ion source (Mg2+) essential for structural stabilization and catalytic activation in a wide range of metabolic enzyme systems in biological matrices. In contrast to the complex organic chelates, it is an inorganic mineral compound with an extremely high active mineral density per volume that is the preferred high-yield active feedstock for compact dietary supplement formulations, multi-mineral tableting, and nutrient enrichment matrices. In addition to the elemental fraction, high-purity commercial grades contain only a few, carefully controlled background trace mineral ions (e.g., minor amounts of calcium and iron oxides) and no undesirable insoluble trace elements, and do not have an added stabilizer to ensure chemical integrity and reactivity during processing. This concentrated, highly stable active elemental profile is a convenient, consistent source of inorganic nutrition, ideal for contract formulators and product developers in a variety of functional food systems, capsule blends, and dietary supplement formulations.
Recommended Dosage
Incorporation levels in commercial products formulated with Magnesium Oxide are normally based on the standard daily magnesium elemental thresholds (usually 250 – 400 mg elemental magnesium per daily dose) for applications in adult dietary supplements – equivalent to ~415 – 665 mg elemental magnesium per day, based on the ~60% elemental density of Pure Magnesium Oxide Powder. In lower inclusion levels (50–150 mg elemental Mg per finished batch), lower amounts are generally used for functional food enrichment and for the specialized beverage fortification matrices, where the target is to keep the taste neutral and to achieve specific nutritional matrices. Finished product dosage strategies are a critical part of the B2B mineral feedstock supplier's role and must carefully comply with the regional regulatory requirements, including Recommended Dietary Allowances (RDA) in the United States by the U.S. FDA and U.S. EU Tolerable Upper Intake Levels (UL) in the European Union, as well as local food additive standards. Formulation teams are encouraged to test finished dosage forms, ingredient synergy in multi-nutrient pre-mixes, and guidelines for specific target demographics to set safe and compliant label claims and doses, which should meet all health authority (and country) requirements and be registered for the country of use.

Application
1. Dietary Supplement & Nutraceutical Manufacturing
Magnesium Oxide Pure Powder is used as a source of minerals in solid dose preparations (e.g. multi-mineral compressed tablets and hard shell capsules) at typical doses of 250 mg to 400 mg elemental magnesium per day (approx 415 mg to 665 mg of raw powder).
2. Functional Food & Beverage Fortification
Fortified cereals, ready-to-mix meal replacement powders, and botanical blend stick packs are the most common applications that use fortified cereals as a nutritive source; typical fortification levels provide 50 mg to 150 mg per food unit.
3. Animal Nutrition & Premix Feed Production
It is used as an essential macro mineral ingredient in livestock and poultry feed concentrates at a bulk batch proportion of 0.1-0.5% of the total dry matter of the feed ration to meet the nutritional requirements of the animals.
4. Personal Care & Cosmeceutical Formulations
Used in topical creams, solid deodorants and facial masks, at levels of 1.0-5.0% (w/w) as a physical absorbent, opacity agent and as a pH stabiliser.
5. Advanced Industrial & Chemical Processing
Under specific batch processing parameters, it is used as a special neutralizer (acid acceptor), as well as a functional filler and a specialized component in the synthesis of industrial polymers and the manufacture of specialties.
FAQ
Q1: Why choose Magnesium Oxide Powder Bulk over lower-density organic salts?
A: It offers a high yield of elements (~60%), which enables contract manufacturers to reduce tablet size and capsule counts and achieve the necessary label targets with maximum density without compromising on processing costs.
Q2: What is the typical particle mesh size and flowability of this bulk material?
A: Bulk stock is micronized (200-325 mesh), providing excellent flowability, uniform dry-blend dispersion, and consistent direct compression performance in high-speed lines.
Q3: How does bulk magnesium oxide handle moisture during warehouse storage?
A: Fine magnesium oxide is stable, but may absorb moisture in the atmosphere over time. Therefore, bulk shipments are fitted with heavy-duty PE moisture barrier liners for complete powder integrity and a long shelf life.
Q4: Is this bulk mineral suitable for functional drinks or liquid suspensions?
A: It has poor water solubility and, therefore, is suitable for solid oral dosage forms and dry pre-mixes, as well as liquid suspension systems containing hydrocolloid suspending agents used in the food industry.
Q5: What commercial documents are supplied for enterprise vendor audits?
A: Each bulk lot comes with a lot-specific Certificate of Analysis (COA), TDS, SDS, Allergen Statement, Non-GMO declaration, and active Kosher and Halal compliance certificates.
Certifications

American warehouse

Exhibitions

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