Dear sir:  We are a professional largest manufactures of ammonium chloride medicine grade,food grade and feed grade grade in china.our products have met the standard of USP24,BP2003,and FCCIV,and are satisfied by our clients.we are exporting our products to USA,GERMANY ,INDIA and so on.  Pl tell me the detail of your need and I will quote you my best.  My email:dinadiao@hotmail.com  Best regards!!  dina