We，Changsha Double Best Industry Co ltd，Are dealing in the import and export business of organic and inorganic chemical raw materials，We have five joint stock and joint venture factory，Who main produced sodium silicofluoride 5000mt，Sodium Metabisulphite（Yunfeng Brand）40000MT，Sodium Chlorate 20000MT，Potassium Chlorate 10000MT，Potassium Perchlorate 6000MT，ZINC SULPHATE（MONO/HEPTA）20000MT，Manganese Sulphate 8000MT，Electrolytic Manganese Dioxide and Naturel Manganese Dioxide  etc。The Above Products Have Exported to European，Amercian，Africa，South-East Asia etc Countries and Area。

our company has advanced and perfect testing facilities, strict manufacturing management and quality assurance system, first-rate products, good services which is  our common pursuit.
We will work harder right along,offer the first-class products and service to customers both at home and abroad,we would like to strengthen the cooperation with friends from all over the world!
Our promise: the quality first,the customer foremost.cooperation-welcomed,
development-together
general manager:kuang wen chu