Gypsum powder is not toxic. The main component of gypsum powder is calcium sulfate, which is chemically stable, unreadable to the human body, non-irritating, non-corrosive but frequent contact will cause some symptoms, such as rough skin, allergies and so on. It is best not to contact these things for a long time. When painting walls, choose some environmentally friendly gypsum powder and try to avoid poisoning. Gypsum is a monoclinic mineral whose main chemical composition is calcium sulfate (CaSO4). Gypsum is a widely used industrial and construction material. It can be used as cement retarder, gypsum building products, modeling, medical food additives, sulfuric acid production, papermaking filler, paint filler, and so on. Pharmacological effects1 Natural gypsum decoction (1:1) injected into artificially febrile animals has antipyretic effect.2. It can significantly enhance phagocytosis of rabbit alveolar macrophage in in vitro culture test.3. It excites the heart of toads and rabbits in small doses, and inhibits it in large doses.4. Gypsum decoction reduces the content of HBVDNA.5. External effects of Calcined Gypsum soothes the tendons and clears away the heat, eliminates the annoyance of thirst, and clears away the heat and removes the toxins. Indications:It can be used to treat fever, upset, delirium, thirst, dry throat, lung fever, dyspnea, sunstroke, spontaneous sweating, stomach fire and headache.