Unfortunately, the term Cr2O3SO3 is not a defined chemical substance. The number of oxygen atoms in this chemical formula does not comply with quantitative rules and does not represent a valid chemical compound.
Therefore, it is not possible to provide information about its name, physical and chemical properties, common chemical reactions, or methods of preparation in the lab or at an industrial scale.
If you are looking for information about a specific chemical substance, please provide the correct name or chemical formula.