Storage system for temozolomide

The invention provides an improved storage system for temozolomide, which preferably includes one or more bags (eg, three bags, which may contain a desiccant which is arranged between two of the bag, included). The storage system of the invention can preserve as a white solid and dry material over long storage periods temozolomide. The invention also provides methods for the production and storage of temozolomide as a stable white solid.