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Technical indicators: industrial (in% of the total) COSO4 7H2O 7H2O≥ 98 Fe ≤ 0.002 Zn≤ 0.001 Ni ≤ 0.001 Cu ≤ 0.002Production Process: cobalt metal and sulfuric acid reactionShanghai liangren chemical co.,ltd is engaged in the manufacture of salt series products of Ni, Co,Chromium,and copper. Relying on the development of science and technology, we have adopted advanced craft and have being keeping on improving it. In the same time, we put a high value on the HR training. Based on the advanced technology and equipment, fine quality and credit, a production of scale is formed and a good influence and reputation is established in wide customers, and we have got well review from our clients.We have and always will uphold the principle of "Credibilities is the priority, clients the paramount" in serving the clients. We develop by competition, existing on quality, providing cheap and quality products for the market. Products of special specifications can be produced by agreements. To any quality problems we guarantee to exchange if returned as unsuitable. Welcome to purchase our products and afford any suggestions.We are here to sincerely expect business client's gesture of cooperation with us, and we would jointly embark on new market and relevant derivative products and high-tech items on a mutually beneficial base. contact:tracy Tel:86-21-69577128 Fax:86-21-59585627