Dear Sir, How are you? We avail ourselves of this opportunity to approach you for establishing the trade relationship with you. We are a professional copper chemicals manufacturer，owning the right of imp&exp for long time. We can supply you good copper products like Copper Sulfate, Copper Oxide. Copper Sulfate Pentahydrate Chemical Formula: CuSO4.5H2O Purity: Min 98% Appearance: Odorless, blue triclinic crystalline powder Usage: used in dyestuffs, asa mordant, pigment, preservative and so on. Copper Oxide Chemical Formula: CuO Purity: Min 98% Appearance: Black Powder Usage: Used for electroplating of electricity plate and the production of stainer for glass, ceramic and porcelain and so on. Pls dont hesitate to contact me for any question, I will try my best to meet your demand. Look forward to hearing from you soon,. Thanks&Regards Delia