Physicochemical parametersIndex name Φ2 ~ 2.5 Φ2.5 ~ 3.5 Abrasion rate,% ≤ 0.25 ≤ 0.20 Bulk density,g/ml ≥ 0.55 ≥ 0.60 Static water absorption , % ≥ 20.0 ≥ 20.0 Static normal hexane absorption, % ≥ 12.0 ≥ 12.0 Specific surface area,m2/g ≥ 120 ≥ 150 Compressive strength point contact strength,N/ grain≥30 ≥30 Variation coefficient of resistance to crushing≤ 0.3 ≤ 0.3 Granularity, % ≥ 96.0 ≥ 96.0 Water content of packed product,% ≤ 1.5 ≤ 1.5 Platinum content% 0.1~1.0±0.02 CAS No. 7440-06-4 Packing10kg/pail, 20kg/pail or on the clients' requirements