1. Particle Size: 40-100nm 2. Purity: Cu%: 30% Reddish brown oily powder, Oil-soluble nano copper powder (lubricants additive) is a reddish brown oily powder, has good chemical and physical stability in the air. Highly dispersed in lubricating grease, epoxy resin, unsaturated polyester resin, rubber and plastic. And can be used as conductive, anti-static and self-repairing function additives.