Our company, SHANGYU LEADER CHEMICAL CO., LTD, are the leading manufacturer of Sodium Hydrosulphite (74%, 85%, 88%, 90% min)in China and also produce Disperse dyes, Reactive dyes, Acid dyes, vat dyes, Indigo Blure granular, Sulphur dyes and textile auxilieries with ISO9001 certificated and OKTEX Standard.