No brief introduction
Size:50nm, 100nm, 5um Purity:99.9% CAS No:7440-47-3 ENINEC No.:231-157-5 Appearance:grey powder Shape:Spherical
Size:500nm,1-3um Purity:99.9% CAS No:12012-35-0 ENINEC No.:234-576-1 Appearance:black Powder Shape:trapezius
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