High purity ammonium perrhenate in good quality. NH4ReO4 99.999%min, Re 69.41%min Appearance: White crystals Common ... ,sample of rhenium compound, and as rhenium element in various high-tech fields. Total metallic impurities:<10ppm Metallic impurities content:(%,max ... , net each 1.0kg; steel drum outside,net each 25kg. High purity ammonium perrhenate