Item	GB1902-94 version	BP2000 version	China pharmacopoeia 2000 version
Content(base on C7H5NaO2 dry basis),%	99.0	99.0-100.5	99.0
Drying loss,%	1.5	2.0	1.5
Dissolve	Meet the stipulation	Meet the stipulation	/
Transparency and color	/	Meet the stipulation	/
Alkalinity acidity;	Meet the stipulation	Meet the stipulation	Meet the stipulation
Cchloride (base on Cl),	500PPm	200PPm	/
Chloride(base on Cl),	/	300PPm	/
Heavy metal(base on Pb),	10PPm	10PPm	10PPm