Do I need to go through the formalities to sell desulfurization gypsum in other provinces now?

Need. As of May 3, 2023, the sales of desulfurized gypsum from other provinces need to go through relevant procedures in the local environmental protection bureau, such as obtaining environmental guarantee and sewage discharge permit. Desulfurization gypsum (degassion gypsum in English), also known as flue gas desulfurization gypsum, sulfur gypsum or FGD gypsum, has the same main component as natural gypsum, namely calcium sulfate dihydrate CaSO4 2H2O, with the content ≥93%.