SHANDONG LUXI ANIMAL MEDICINE SHARE LIMITED COMPANY

This product is an aqueous suspension of levamisole hydrochloride and penicillin, containing levamisole hydrochloride: (C₁₁H₁₂N₂S ·HCI) and penicillin (C₁₃H₆Cl₅ NO₃) should be 85.0% ~115.0 %.

       (Properties) This product is a yellow suspension liquid.

       [Identification] (1) Take the appropriate amount of this product (about 0.15g of levamisole hydrochloride), set the separatory funnel, add 5ml of water, add 5ml of 2mol/L sodium hydroxide solution, shake it slightly, add chloroform 25ml , shaking and extracting, standing layering; taking chloroform layer into another separatory funnel, adding 30 ml of 1 mol/L hydrochloric acid solution, shaking and extracting, standing layering, discarding the chloroform layer, taking the water layer about In a 15ml beaker, add about 20ml of 2mol/L sodium hydroxide solution, boil for 10 minutes, let cool, add a few drops of sodium nitrite sodium cyanide test solution, which is red; after placement, the color gradually becomes light.

      (2) The solution under the content determination is determined by ultraviolet-visible spectrophotometry (Appendix 23) and has a maximum absorption at a wavelength of 300 nm.