What is the formula for aluminum sulfite?

The formula for aluminum sulfite is Al2(SO3)3. It is a chemical compound made up of two aluminum ions (Al3+) and three sulfite ions (SO32-). The compound is formed by the reaction of aluminum oxide or aluminum hydroxide with sulfur dioxide in the presence of water. Aluminum sulfite is a white or off-white powder that is slightly soluble in water and has a molecular weight of 342.14 g/mol. It is commonly used in water treatment, paper manufacturing, and as an anti-foaming agent.