4-bromocrotonic Acid CAS NO.13991-36-1 CAS NO.13991-36-1

hebei yanxi chemical co., ltd who registered capital of 10 million yuan, nearly to $2 million, we have a pharmaceutical raw materials factory production of pharmaceutical raw materials, and a reagent r&d center, and we do research and development production of reagent tens of thousands of species. our aim is quality strives for the survival. seek development by credit reputation. our products have big price advantage in europe south america and so on .and our company also has the advantage of high quality in africa. in the past two years our products has reached more than 30 countries in the world, europe. south america. north america, southeast asia, africa, etc. we welcome all over the world with the best quality and lowest price friend common cooperation and common development!