Magnesium Carbonate, also known as Magnesium Carbonate Basic Pentahydrate, Magnesium Hydroxycarbonate Pentahydrate, Magnesium Hydroxy Carbonate Pentahydrate, and Carbonic Acid, is often 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). Lab grade chemicals possess reasonable purity but do not comply with any official standard for quality or purity like the ACS Grade, the USP Grade, or the FCC Grade. The Lab Grade is also known as Laboratory Reagent (LR) and Chemically Pure (CP). Lab Alley’s Magnesium Carbonate, Lab Grade is recommended for educational institutes, research labs, and commercial applications.