Now’s isolators are decontaminated mainly with hydrogen peroxide shipped as both a gas or a condensing vapour based on the type of generator picked. Chlorine dioxide can be used, but will not be that common. That's why isolators are most often sanitized using hydrogen peroxide vapor (a area disinfectant). https://medium.com/@tailinscitech/applications-and-benefits-of-tailin-containment-isolator-for-handling-high-potency-materials-8c66a55dbcf7