| Main use: | 
                          (1)  Used as reducer, dyes auxiliary of dyeing industry, synthetic dyes and  intermediates. 
(2) Used as bleaching agent of paper pulp in paper-making industry. 
(3) Used as bleaching agent of china clay in the ceramics industry. 
(4) Used as deoxidizer of rubber and styrene butadiene rubber synthesis,  developer in photo-taking industry. 
(5) Used as reducing agent, bleaching agent in the industries including  pharmacy, food, metallurgy and leather.  |