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80% Magnesium Oxide

Updated: 2026-08-04

Overview

Magnesium Oxide 80% is a chemical compound primarily composed of magnesium and oxygen. It is widely used in industrial applications due to its high melting point and thermal stability. This grade of magnesium oxide is commonly produced by calcining magnesium carbonate or magnesium hydroxide. In industries, it serves as a critical raw material for manufacturing refractory products, ceramics, and construction materials. Its alkaline nature also makes it useful in environmental applications, such as wastewater treatment and flue gas desulfurization.

Physical and Chemical Properties

Magnesium Oxide 80% appears as a fine white powder with a density of 3.58 g/cm³. It has an exceptionally high melting point of 2,852°C, making it ideal for high-temperature applications. The compound is slightly soluble in water but reacts with acids to form magnesium salts. Its refractory properties stem from its ability to withstand extreme heat without decomposing. Additionally, magnesium oxide is chemically stable under normal conditions but can react with strong acids or absorb carbon dioxide from the air over time.

Main Applications

The primary use of Magnesium Oxide 80% is in the production of refractory bricks and linings for furnaces, kilns, and reactors. Its thermal stability ensures longevity in high-heat environments. In construction, it is added to cement and plaster to improve fire resistance and durability. Agriculture benefits from magnesium oxide as a soil amendment to correct magnesium deficiencies. It is also used in metallurgy as a slag conditioner and in the manufacture of electrical insulators. Environmental applications include neutralizing acidic waste streams and reducing sulfur dioxide emissions.

Safety and Storage

Magnesium Oxide 80% is generally considered non-toxic but can cause irritation if inhaled or in contact with skin. Workers should use dust masks and gloves when handling the powder. Proper ventilation is essential to minimize airborne particles. Storage requires a dry, cool environment to prevent moisture absorption, which can reduce its effectiveness. Keep containers tightly sealed and away from acids or other reactive chemicals. Bulk storage should be in silos or drums with desiccants to maintain quality.

B2B Procurement Guide

When procuring Magnesium Oxide 80%, buyers should prioritize purity and particle size, as these factors directly impact performance in specific applications. Reputable suppliers often provide certificates of analysis (CoA) to verify product specifications. Bulk purchasing can reduce costs, especially for large-scale industrial users. Buyers should also consider logistics, such as packaging options (bags, supersacks, or bulk shipments) and supplier reliability. Establishing long-term contracts with trusted suppliers can ensure consistent quality and pricing stability.

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