sewage treatment
waste water solution
decoloring
plant fertilizer
animal glass fertilizer

 Shenzhen Chang Long chemical Co.,LTD the biggest and profession sewage treatment company in

China, we have a highly reputation in this industry our market across half world, espacially

developing countries.

We are the original supplier factory of Ferrous sulfate, which is no any dealers extra charges comes

to you if you direct work with us.

we insure you that you could always get inexpensive and first hand ferrous sulfate from us, you will

be benifit prices, quality, services, convenient transportation.