Purity: 99.0-101.5% (Anhydrous)Appearance: White crystalline powderSolubility (1%): Colorless. clear, completeLoss on Drying: ≤1%Alkalinity: No color is produced.Heavy Metals: ≤0.001%Identification: To give positive tests for Potassium and for Iodide.Test for Nitrate, Nitrite, and Ammonia: No blue coloration of the paper is discernible.Test for Thiosulfate and Barium: No turbidity develops within one minute.Test for Iodate: ≤4ug/g