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Home / All / Fertilizer & Agrochem / Minerals / High Magnesium Oxide Powder

High Magnesium Oxide Powder

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Categories	Minerals
Trademark/Brand	Richase Specialty Chemical Additives Supplier
Model	MgO: 65%, 70%, 75%, 80%, 85%, 90%, 92%, 94%, 95%
Item	Magnesium Oxide
Packing	PP+PE 25/50 net
HS code	2519909100
Molecular Weight	40.31
Certificate	ISO, SGS, CIQ, CCIC, Intertek
Application	Industrial, Fertilizer, Feed
FOB port	Dalian port
Terms of Payment	L/C, D/P, Western Union, MoneyGram, T/T
Update Time	Jan 5,2026

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Detail Information

What is Magnesium Oxide Powder?

Magnesium oxide (MgO), or magnesia, is a white hygroscopic solid mineral that occurs naturally as periclase and is a source of magnesium . It has an empirical formula of MgO and consists of a lattice of Mg2+ ions and O2− ions held together by ionic bonding. Magnesium hydroxide forms in the presence of water (MgO + H2O → Mg(OH)2), but it can be reversed by heating it to separate moisture.

Core Features & Competitive Advantages

Ultra-High Purity & Concentration

· High Magnesium Content: Delivers ≥ 90% Magnesium Oxide (MgO), making it one of the most concentrated forms of magnesium available. This ensures unparalleled delivery efficiency and cost-effectiveness per unit of active nutrient.

· Controlled Reactivity & Particle Size: Production can be tailored to yield powders with varying reactivity (light-burned vs. dead-burned) and particle size distributions, catering to diverse needs from rapid acid neutralization to long-term, slow-release applications.

2. Exceptional Versatility & Chemical Stability

· Strong Alkalinity: Possesses significant alkaline properties, effectively neutralizing acidity in soils or industrial wastes to regulate pH and improve environmental conditions.

· High Thermal Stability & Low Solubility: Particularly dead-burned MgO, exhibits extremely high refractoriness and very low water solubility, making it ideal for high-temperature industrial uses and soil amendment requiring long-term, slow magnesium release.

Stability & Functionality

Physical & Chemical Stability

· Excellent Storage Stability: Chemically very stable under dry conditions, with low hygroscopicity and caking tendency (especially dead-burned grades), facilitating long-term storage and global shipment.

· Long-Lasting Functionality: Provides a slow, sustained release of magnesium ions and continuous acid-neutralizing action in soil, offering long-term nutritional and amendment benefits rather than a short-term shock.

Core Functionality
· Foundation for Plant Growth: Magnesium is the central atom of the chlorophyll molecule, directly governing photosynthetic efficiency and is vital for crop yield, quality, and carbohydrate synthesis.

· Essential for Animal Health: Acts as a cofactor for hundreds of enzymes in animal metabolism, indispensable for bone development, nervous system function, and energy metabolism.

· Efficient Industrial Additive: Serves critical roles in refractories, flue gas desulfurization, rubber vulcanization acceleration, and more, due to its high melting point, alkalinity, and reactivity.

Feed Grade Magnesium Oxide Powder：

Product:	Magnesium Oxide
CAS No.:	1309-48-4
Molecular Formula:	MgO
Molecular Weight：	40
HS CODE:	251990
Properties:	Solid
Specifications：
Items	Unit	Specifications
Purity as MgO	%,approximate	85,90,95
Size	mm	200mesh, 325mesh, 0.1-2mm, 0.3-2mm, other size can be customized.
Appearance	We can adjust specifications according to your application and requirements

END

Product Application

1. Agriculture: Long-lasting Soil Amendment & Magnesium Fertilizer

Application: Used for ameliorating acidic soils, gradually and persistently raising soil pH while supplementing magnesium. Particularly suitable for magnesium-demanding crops like fruit trees, vegetables, and cash crops.

Benefit: A dual-purpose solution that corrects soil acidity (improving soil environment and nutrient availability) while simultaneously preventing and correcting magnesium deficiency in plants, enhancing leaf photosynthesis and fruit quality.

2. Animal Nutrition: Feed-Grade Magnesium Supplement

Application: Used as a magnesium additive, premixed into complete feed or mineral supplements for cattle, sheep, poultry, and aquaculture at scientifically determined ratios.

Benefit: Ensures livestock receive adequate essential minerals, preventing deficiency disorders like "grass tetany," and supporting normal metabolic functions, bone health, and production performance.

3. Industry: High-Performance Refractory & Environmental Additive

Application: A primary raw material for producing basic refractories like magnesia bricks; used in environmental protection to neutralize acidic substances in industrial wastewater or flue gas.

Benefit: Offers exceptional high-temperature resistance and high chemical purity, ensuring the longevity and operational safety of industrial kilns; efficiently neutralizes acidic pollutants, aiding in environmental compliance.

Applications & Solutions

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FAQ

Q1: For agriculture, what's the main difference between Magnesium Oxide Powder and

A: The core differences are solubility speed and secondary function. Magnesium Sulphate (e.g., hepta- or monohydrate) is highly water-soluble, acts quickly, and is suitable for rapid correction of deficiency or foliar sprays, also supplying sulfur. Magnesium Oxide Powder dissolves slowly, providing a long-term Mg supply and possesses significant soil-acid-neutralizing capability. Choose based on need: use magnesium sulphate for quick correction; Magnesium Oxide Powder is superior for simultaneously amending acidic soil and providing long-term magnesium.

Q2: Do light-burned and dead-burned Magnesium Oxide Powders differ in application?

A: Yes, the key difference is "reactivity." Light-burned MgO is highly reactive, faster-acting, and is more commonly used in applications requiring rapid chemical reaction, such as environmental desulfurization, certain chemical processes, or in agriculture where a relatively quicker start is desired. Dead-burned MgO has low reactivity, is extremely stable and heat-resistant, and is primarily used for manufacturing refractories, or in agricultural projects requiring very slow release.

Q3: Is it safe to add Magnesium Oxide Powder to animal feed? Are there standards?

A: Yes, it is safe when using products that meet feed-grade specifications. Feed-grade magnesium oxide has strict limits on heavy metals (e.g., lead, arsenic) and impurities. It must be used strictly at the inclusion rates recommended by animal nutritionists. Overuse can cause diarrhea. Richase supplies Magnesium Oxide Powder compliant with stringent feed safety standards.