Gypsum powder is not poisonous. The main component of gypsum powder is calcium sulfate, which is relatively stable in chemical properties, unreadable to human body, non-irritating and non-corrosive. However, frequent contact will cause some symptoms, such as rough skin and allergies. It is best not to touch these things for a long time. When painting the wall, choose some environmentally friendly gypsum powder to avoid poisoning. Gypsum is a monoclinic mineral, and its main chemical component is calcium sulfate (CaSO4). Gypsum is a widely used industrial material and building material. It can be used in cement retarder, gypsum building products, model making, medical food additive, sulfuric acid production, paper-making filler, paint filler, etc. Pharmacological action 1. Natural gypsum decoction (1∶ 1) has antipyretic effect when injected into artificially febrile animals. 2. It can obviously enhance the phagocytic function of rabbit alveolar macrophages in vitro culture test. 3. Small dose excites toad heart and rabbit heart, while large dose inhibits it. 4. Gypsum decoction can reduce the content of HBVDNA. 5. External use of calcined gypsum. Efficacy can relax tendons and activate collaterals, clear away heat and quench thirst, and clear away heat and toxic materials. Indications: It is used to treat fever, upset, delirium, thirst, dry throat, lung heat, dyspnea, heatstroke, spontaneous sweating, stomach fire and headache.