Sulfamethazine Base CAS NO.57-68-1

BP2009, EP6,USP31

Sulfadimidine

Veterinary medicine governor of the People's Republic of China
（2010）	BP2009	EP6	USP 31
Property: White or yellowish crystal or powder	White or yellowish crystal or powder	Same with BP	Same with BP
Melting point:197-200℃	197-200℃	197-200℃	197-200℃
Identification:
(1)(2)(3) shall comply with	ABCD shall comply with	ABCD shall comply with	ABCD shall comply with
pH value:≤0.1mol/L NaOH 0.2ml	≤0.1mol/L NaOH 0.2ml	Same with BP	Same with BP
Chloride:≤0.01%	/	/	/
Related substances:≤0.5%（TLC）	≤0.5%（TLC）	≤0.5%（TLC）	/
Drying loss:≤0.5%	≤0.5%	≤0.5%	≤0.5%
Residue on ignition:≤0.1%	≤0.1%	≤0.1%	/
Heavy metal: No more than ten over 10 PPM	≤20PPM	≤20PPM	≤20PPM
Selenium：	/	/	≤0.003%
Content (Anhydrous substance) : No less than 99.0%	99.0-101.0%	99.0-101.0%	99.0-100.5%