Hangzhou Yanshan Chemical Co.,Ltd is a well established company with an extensive experience in the field of fine chemicals. We are an international company specializing in the manufacture of APIs&Intermediates ,Phase Transfer Catalysts (PTC), Quaternary Ammonium Compounds(QUATS).Our main products are: Acebutolol Hydrochloride, Amiloride Hydrochloride, Neostigmine Methylsulfate, Neostigmine Bromide, Pyridostigmine Bromide, Torsemide, Quinapril Hydrochloride, Triamterene, Methyl 3,5-diamino-6-chloropyrazine-2-carboxylate, 3-(N,N-dimethylcarbamoyloxy) pyridine, 3-Aminopyrazine-2-carboxylic Acid, 2-Acetyl-4-butyramidophenol, 2-Aminobenzamide, 2,4-Dichloropyrimidine, 4,6-Dichloropyrimidine, 2,4,6-Pyrimidinetriamine, 6-chlorouracil, Potassium hydroxide, Ethyl ethanote, Benzyltrimethylammonium Hydroxide, Tetramethylammonium Hydroxide, Tetraethylammonium Hydroxide, Tetrapropylammonium Hydroxide, Tetrabutylammonium Hydroxide, Benzyltrimethylammonium Chloride, Tetramethylammonium chloride, Tetraethylammonium chloride, Tetraethylammonium bromide, Tetrapropylammonium bromide and so on.With a dedicated and hardworking, yet highly qualified and expanding Team of staff, we offer Top Quality products with the Best Service at Competitive Price.