Appearance White or almost white crystalline powder
Speific optical rotation +138° to +152°
Identification 1/the same retention time reference peak
2/ Sodium reaction
3/ the same chart with the reference
PH 5.0-7.0
Solubility Clear or 1 max
Water 4.0% max
Relative substances Single impurity: 2.0% max
Total impurity: 4.0% max
Residue on ignition 22.1% max
Heavy metals 20ppm max
Insolubility 10um min---1000/g
25um min---150/g max
Bacterial endotoxin 0.05EU/mg max
Residual Solvents Ethanol: 2000ppm max
Ethyl acetate: 200ppm max
Assay Tazobactam:87.5%min,on dry base