Hangzhou Yanshan Chemical Co.,Ltd is a well established company with an extensive experience in the field of fine chemicals.Our main products are:Amiloride Hydrochloride, Neostigmine Methylsulfate, Neostigmine Bromide, Pyridostigmine Bromide, Methyl 3,5-diamino-6-chloropyrazine-2-carboxylate, 3-(N,N-dimethylcarbamoyloxy) pyridine, 3-Aminopyrazine-2-carboxylic Acid,Potassium hydroxide,Benzyltrimethylammoni
um Hydroxide, Tetramethylammonium Hydroxide, Tetraethyla
mmonium Hydroxide, Tetrapropylammonium Hydroxide, Tetrabutylammonium Hydroxide, Benzyltrimethylammonium Chloride, Tetramethylammonium chloride, Tetraethylammonium chloride, Tetraethylammonium bromideand so on.