Sulfadiazine(SD)
Veterinary medicine governor of the People's Republic of China
(2010)                                                                           BP2009                                                                        EP6                   
Property: White or off-white crystal or powder      White, light yellow to white crystalline powder      White, light yellow to white crystalline powder                   
Identification: (1) (2) (3) shall comply with            ABC shall comply with                                            ABCD shall comply with
Acidity: ≤0.1mol/L NaOH 0.2ml                             ≤0.1mol/L NaOH 0.2ml                                            ≤0.1mol/L NaOH 0.2ml  
Clarity and color of alkaline solution: Clear         ≤Y3                                                                               ≤Y5 BY5GY5
Chloride : ≤0.01%                                                    /                                                                                     /                         
Drying loss: ≤0.5%                                                  ≤0.5%                                                                           ≤0.5%                   
Residue on ignition: ≤0.1%                                   ≤0.1%                                                                           ≤0.1%                   
Heavy metal: No more than ten over 10 PPM       ≤10PPM                                                                      ≤10PPM                   
Content (Anhydrous substance) : ≥99.0%           99.0-101.0%                                                               99.0-101.0%  
Related substances :≤0.5% (TLC)                       ≤0.5% (TLC)                                                                /