Our main products :Ferrous Sulphate Heptahydrate , Ferrous Sulphate Monohydrate, aluminium sulfate, Polyacrylamide, ,Flocculant, Retention Aid, Dewatering Agent, etc.

Shenzhen Changlong Technology Co., Ltd is one of the largest professional environmental friendly pharmaceutical manufacturer and sales enterprise in Southern of China. The company products have passed the ISO9001:2008.We sell 15000 tons of ferrous sulfate and more than 5000 tons of aluminum sulfate monthly. the trademark "Qingyuan" was register for ferrous sulphate .we export to markets of USA, Australia and Vietnam,india ,.Indonesia,and middle east etc. We make business in good faith, providing high quality products and good service, which makes us won high reputation among clients.

The Company have 10 Engineers and 4 senior University professors who can provide technical guidance for customers. Helping customers to optimize the sewage treatment process is our arm. We also strive to reduce customers' costs, save energy and to gain enterprise's integrated benefit, environmental benefit and social benefit together with you.

"To be responsible, diligent, dedicated, and happy" is our spirit. Best quality products and Competitive price is our advantage .Welcome you visit at any time.