The chemical formula Al2(CO3)3 refers to the chemical aluminum carbonate. This chemical compound of aluminum, carbon and oxygen is unstable and rapidly decomposes to aluminum hydroxide and carbon dioxide.
Aluminum carbonate is so unstable that it does not usually occur in nature, but it can be created in a laboratory via a reaction between aluminium sulfate and sodium carbonate. This reaction also creates sodium sulfate, or Na2SO4, as a byproduct. It has a mass of 233.99 grams per mole. Aleksandr Loran used aluminum carbonate's rapid decomposition into carbon dioxide and aluminum hydroxide in the fire extinguisher that he developed in 1904.