HomeProducts

Magnesium oxide

CAS Number
1309-48-4
EC Number
215-171-9
Chemical Formula
MgO
Molecular Weight
40.305 g/mol

Description

Magnesium oxide (CAS 1309-48-4 ), also known as magnesia or E530 , is a high-temperature inorganic compound sourced from the calcination of magnesite or seawater-derived magnesium hydroxide. It functions as a pH regulator, refractory material, and nutrient source across a broad range of industrial and food-grade applications. In steelmaking and cement production, dead-burned magnesia grades line furnaces. These grades are essential for kilns where extreme heat resistance is required. Agricultural feed producers incorporate it as a magnesium supplement to prevent grass tetany in livestock and improve animal health. Food manufacturers use E530-grade material as an anti-caking agent and acidity regulator in processed products. Water treatment operations dose it to neutralize acidic effluents and stabilize pH levels. This compound offers stabilization without the sharp reactivity of lime. Pharmaceutical and cosmetic formulators rely on USP and BP grades as an antacid active and mild abrasive in oral care products. Magnesium oxide is supplied as a white powder in light-burned, hard-burned, and dead-burned forms. Each is calcined at different temperatures to deliver distinct reactivity and surface area profiles. These profiles are suited to specific end uses across various sectors. Standard commercial grades include food-grade, Ph.Eur. , and technical or refractory grades for heavy industrial manufacturing. Bulk bags, drums, and loose bulk supply are standard packaging formats across global markets. This ensures reliable logistics for large-scale chemical distribution and specialized manufacturing needs. Contact us for supply of Magnesium oxide Request Quote

Other Names (Synonyms)

MgO | Magmitt | magnesia | Granmag | Heavy magnesium oxide | Calcined magnesia | Seawater magnesia | Anscor P | E530

Key Technical Features

  • High Purity Grade standard
  • Consistent Batch Quality
  • Full Regulatory & REACH Support
  • Global Logistics Network enabled

Physical Properties

Melting Point2800 °C
Boiling Point3600 °C
Density3.58 g/cm³
Flash Point3600°C
AppearanceMagnesium oxide forms a finely divided white particulate dispersed in air.
ColorWhite
Odorwh. powd. or cryst., odorless
Formnanopowder
Water Solubility6.2 mg/L (20 ºC), reacts
Refractive Index1.736
pH10.3 (H2O, 20℃)(saturated solution)

Safety & Handling

Warning
GHS07· Irritant

Hazard Statements

H319Causes serious eye irritation
H335May cause respiratory irritation

Precautionary Statements

P261Avoid breathing dust/fume/gas/mist/vapours/spray.
P271Use only outdoors or in a well-ventilated area.
P280Wear protective gloves/protective clothing/eye protection/face protection.
P319Get medical advice/attention if you feel unwell.
P405Store locked up.
P501Dispose of contents/container in accordance with local regulations.
P265Wash … thoroughly after handling.
P340IF INHALED: Remove person to fresh air and keep comfortable for breathing.
P317If eye irritation persists: Get medical advice/attention. Get emergency medical help.
P233Store in a well-ventilated place. Keep container tightly closed.
P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.

Trade & Regulatory

HS Code25199010
UN Number1418
Storage Class11 - Combustible Solids
WGK (Germany)1