EDTA, Ammonium Thiosulfate, Potassium Thiosulfate manufacturer / supplier in China, offering NPK Fertilizer: Becefical for Crops and Plants 15-15-15/20-10-10/16-8-16/25-5-10/12-11-18, Ammonium Chloride Aids in Removing Oxide Layers and Enhancing Solder Adhesion, Ammonium Chloride: a Vital Ingredient in Fluxes for Metal Coating and Soldering and so on.