Nanoparticle size: 5 to 20 nm; Purity: 99.99%; Chemical symbol: Cu; CAS No.: 7440-50-8; Group: 11; Electronic configuration: [Ar] 3d ^ 10 4s ^ 1; Density: 8.96 g / cm3; Atomic mass: 63.55 g / mol; Melting point: 1,085 ° C; Boiling point: 2,562 ° CWe also produce other nano copper dimensions, from 5-20 nm to 5-100 nm. The price is $1500 usd/gr. The price decreases as the order increases.