Identification PASSSolubility in water freey soluableSolubility in etahnol Slightly soluableUltraviolet absorption 227±2nmTest for Potassium PositiveTest on deposti Yellowish depositAssary (dry basis) 99.0-101.0%Organic impurites μg/g ≤20Loss on drying (105°C, 2h) ≤1.0%PH value 5.5-7.5Fluorid ≤3mg/kgHeavy metals ≤5 mg/kgLead ≤1 mg/kgArsenic ≤3mg/kgSelenium ≤10 mg/kg