Dear Sir, We need custic soda of below specification for for your quotation and your favorable reply by return will be highly appreciated. Custic Soda(Prill/Flake/Pearts): Qty=180M.T(?10%) Specification:No0H: 94% wt(min),NaCl :2% wt (max),Na2CO3: 1.5%(Max),Hg:0.5 ppm wt(max),As: 0.8 ppm wt (max),Cr:5ppm wt(max),Cd:2ppm wt(max),Pb:5ppm wt(max) Thanking you in advance,we are. With tks,S.S.Ahmed.