Magnesium Carbonate, USP Grade *

Also Known as Magnesite and Magnesia Alba

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About Magnesium Carbonate, USP Grade

Magnesium Carbonate, also known as Magnesium Carbonate Basic Pentahydrate, Magnesium Hydroxycarbonate Pentahydrate, Magnesium Hydroxy Carbonate Pentahydrate, and Carbonic Acid, is commonly available as basic pentahydrate of Magnesium(2+) Carbonate having the chemical formula C4H12Mg5O19 or (MgCo3)4-Mg(OH)2-5H2O. It appears as white odorless air/moisture sensitive powder and is insoluble in Water at ambient conditions. Upon heating, it may release Carbon Oxides or other toxic vapors as the decomposition products. It’s a key source of Magnesium that can easily be converted to other Magnesium compounds, such as the oxide by heating (calcination). A USP Grade chemical is the one that conforms to the criteria of the United States Pharmacopeia (USP). A substance that has received the USP Grade certification can be used in food, drug, or medical applications. Due to its high purity, Lab Alley’s Magnesium Carbonate, USP Grade is a USP Grade chemical.

Common Uses and Applications

  • Food Additive
  • Fire Retardant
  • Fertilizer production
  • Ceramics and glass production


Chemistry Table


Magnesium Carbonate, USP Grade Specifications

Assay 40.0-43.5%
Appearance of Solution To Pass Test
Microbial Limit To Pass Test
Soluble Salts 1.0%
Acid-Insoluble Substances 0.05%
Arsenic 2 ppm
Calcium 0.43%
Heavy Metals 0.002%
Iron 0.02%
Density Approx. 0.5 g/cc
Chloride 0.07%
Sulfate 0.6%
Precipitation Test To Pass Test

Safety and Shipping Information

Please contact us to request a Safety Data Sheet (SDS) and Certificate of Analysis (COA) for Magnesium Carbonate, USP Grade

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Questions & Answers

  • Hello, Can I get the Certificate of Analysis (COA) for this product. Thanks

    We will provide you the COA on the email address provided. 
    Thank you.