... 98.5% 99% Min 3.Industry/food Grade POTASSIUM CARBONATE:1.Formula:K2CO3 2.Purity:98.5% 99% Min 3.Grade:industry Grade 4 ... .Supply 1000t/Month Appearance:White powder or crystal particles Specification: Industrial Grade ( ... welding wire, pharmaceutical ,decarization hydrogen peroxide,enamel,high-grade products ,printing and dyeing,potassium sodium silicate glass,etc ...