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Tongdan New material Technology Co.,Ltd. is located in Loudi City, Huan provide, founded by Mr. Tongyongjun, owner of Tongzhiyan New Material Technology Co.,Ltd, with more than 20 years experirence in dyeing industry, as chief chemical engineer.

Tongdan has production bases in Hunan, Heilong jiang, Jiangxi province, employes 65 full time staff of which 15 are R&D Staff, operating in 10000 squre meters of facilities including 3 production laboratories.

Tongdan manufactures and supplies dyes intermediates, dyes and pigments, main products include Quinizarin(99% purity), Leucoquinizarin, Solvent Blue 35/36/78, exporting to Germany, Japan, India, USA etc., Quinizarin's market share in overseas countries has reached 80%. These products are widely used in plastic coloring such as automobile taillights, pharmaceutical anticancer drugs, batteries, cell dyeing, textile coatings, inks, printing and dyeing, plastic products, ceramics, etc.