characters：white or light yellow crystalline powder
executive standard：gb/t 37785-2019
package：in bulk
storage ：kept in a dry, cool, well-ventilated place, protect from sun and rain, and should avoid fire.
main usage：fgd gypsum is widely used in construction, building materials, industrial molds and art models, chemical industry and agriculture, food processing,medicine hairdressing and many other application fields,it’s an important industrial raw materials.
| item | unit | index |
| attached water content | % | ≤15 |
| calcium sulphate dihydrate（caso4·2h2.o） | % | ≥85 |
| chloridion（cl-） | mg/kg | ≤600 or contract value |
| calcium sulfite hemihydrate（caso3·1/2h2·o） | % | ≤0.5 |
| water-soluble magnesium oxide（mgo) | % | ≤0.1 |
| water-soluble sodium oxide（na2·o） | % | ≤0.06 |
| ph | % | 5.0-9.0 |