ITEMSPECIFICATIONNA2SO3 CONTENT:97.0 %MINSODIUM SULPHATE:2.5%MAXSODIUM CHLORIDE (NACL):0.10%MAXIRON (FE) :0.002%MAXARSENIC ( AS ) :0.0002% MAXHEAVY METALS ( AS PB) :0.0005% MAXWATER INSOLUBLE :0.05%MAX Property: white gravel or powder crystal,relative…