Magnesium bicarbonate

Updated: 2026-09-11

Overview

Magnesium bicarbonate is an inorganic compound with the formula Mg(HCO3)2. It is not commonly found in solid form due to its instability, but it exists in aqueous solutions, particularly in natural mineral waters. The compound is formed when magnesium hydroxide reacts with carbon dioxide in water. Magnesium bicarbonate is primarily used in industrial and commercial applications, including water treatment processes where it helps to adjust pH levels and remove impurities. Its role in food and pharmaceuticals is also notable, serving as a source of magnesium in dietary supplements.

Physical and Chemical Properties

Magnesium bicarbonate is a white crystalline powder when isolated, though it is more stable in solution. It decomposes upon heating, releasing carbon dioxide and forming magnesium carbonate. The compound is soluble in water but insoluble in alcohol and other organic solvents. Its instability in solid form makes it challenging to handle, requiring careful storage conditions to prevent decomposition. In aqueous solutions, it acts as a weak base, contributing to its use in neutralizing acidic environments.

Main Applications

In water treatment, magnesium bicarbonate is used to soften water and remove heavy metals. Its ability to neutralize acids makes it valuable in industrial processes where pH adjustment is critical. The food industry employs it as a buffering agent and a source of magnesium in fortified products. The pharmaceutical industry utilizes magnesium bicarbonate in antacids and dietary supplements. Its role in health supplements stems from magnesium's importance in human physiology, including muscle function and bone health.

Safety and Storage

Magnesium bicarbonate is generally considered non-toxic, but it may cause mild irritation upon contact with skin or eyes. Proper handling includes using gloves and eye protection. Storage should be in a cool, dry environment to prevent moisture-induced decomposition. For industrial use, bulk storage in sealed containers is recommended to maintain stability. Suppliers often provide solutions of magnesium bicarbonate to avoid the challenges associated with its solid form.

B2B Procurement Guide

When procuring magnesium bicarbonate, prioritize suppliers with certifications for quality control, such as ISO or GMP. Verify the compound's purity, especially for applications in food and pharmaceuticals. Pricing varies based on purity and order volume, with bulk purchases typically offering cost savings. Consider the form of the product—solid or solution—based on your application needs. For solutions, inquire about concentration and stability. Reliable suppliers should provide material safety data sheets (MSDS) and technical specifications upon request.