It's dangerous. Zhejiang Huayou Cobalt Co., Ltd. was established on May 22, 2002. Its registered address is Wuzhen East Road, Tongxiang Economic Development Zone, Zhejiang Province, and its legal representative is Chen Xuehua. Business scope includes R&D and production. Sales: cobalt, nickel, copper oxide, cobalt, nickel, copper salt, cobalt, nickel, copper metal and products. The production of chemicals is harmful to human body, especially some chemical raw materials. If you work for a long time without taking any measures, it will do great harm to the human body. First of all, it will lead to the decline of the body's immunity, the body will also fail, and even have an impact on the brain.