Changsha weichuang chemical co.ltd,was founded in the year of 2000,the head office and the department of exportation are in changsha,consists of two plants:no 1 chemical plant and no 2 chemical plant,occupying 28000 square meter,with fixed assets of RMB12 million.the plants location are closely to sea port,it could save much freight cost.Sodium metabisulphite(8000mt/year),sodium thiosulpha(6000mt/year),sodium sulphite(5000mt/year).ferrous carbonate (10000mt/year) are our main product.

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