NaCl M.W. 58.44 5 kgAssay(after ignition) min 99.5%Identity passe testAppearance of solution passes testAcididty or alkalinity passes testpH of 5% solution 5.0-8.0Insoluble matter max 0.005%Bromide (Br) max 0.005%Iodide(I) max 0.001%Ferrocyanide(Fe(CN)6) max 0.0001%Chlorate & Nitrate(NO3) max 0.003%Nitrite (NO2) passes testPhosphate(PO4) max 0.0005%Sulphate(SO4) max 0.001%Total Nitrogen max 0.0005%Heavy metals (as Pb) max 0.0005%Arsenic(As) max 0.00004%Barium(Ba) max 0.001%Calcium(Ca) max 0.002%Copper(Cu) max 0 .0002%Iron(Fe) max 0.0002%Magnesium(Mg) max 0.001%metals (as Ca) max 0.01%Potassium(K) max 0.005%