Mainly usded in synthetic-gas-decarbonization, tube, glass, enamelware,dyestuff,electric welding,photograph welding, photogra ItemII GRADEI GRADEK2CO399%min98.5%minChloride(kCl)0.03%max0.1%maxSulph(K2SO4)0.04%max0.1%maxIron0.001%max0.003%maxWater Insoluble0.04%max0.05%maxLoss of burning0.8%max POTASSIUM CARBONATE