Maivisa S.L.

Bengbu Yongyan Dyestuff Chemical Co., Ltd. is a national high-tech enterprise that has been producing sulfur dyes since 1968 and has a production history of over 40 years. We specialize in the production and operation of a series of sulfurized varieg

A comprehensive enterprise that produces pharmaceutical intermediates and chromatographic and analytical grade chemical reagents; Integrating research and development, customization, production, and operation; We have our own laboratories at Nanjing