Size:20nm, 50nm, 100nm, 200nm, 1-2um, 5um, 10um Purity:99.9% CAS No:7440-21-3 ENINEC No.:207-828-8 Appearance:Yellow brownish, grey Powder Shape:Spherical
Size:100nm, 1-3um Purity:99.9% CAS No:12031-82-2 ENINEC No.:223-759-6 Appearance:black Powder Shape:Spherical
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