Assay (as Bacl2 2H2O): 98-100% by wt. Min. Matter insoluble in Water: 0.2% by wt. Max. Iron (as Fe): 0.01% by wt Max. Substance not precipitated by Sulphuric acid: 0.20% by wt. max. Calcium & Strontium Salts: 0.30% by wt. Max Copper (as Cu): 0.002% by wt. Max. PH (of aqueous solution): 5-8 by wt Max. Water soluble sulphides (as S) parts per million: 40 PPM Max. Oxidising substances (as NO2) Heavy Metals (as Pb) parts per million: 100 PPM Max. Sulphur Compounds (as S): To Pass Test
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