Appearance: Red crystalline fine powder
Assay: 900 I.U.mg Min.

Identification:
1) Maximum absorption is at the wavelength of 223nm, 314nm, 445 nm.  
    Absorption degree ratio at 314nm and 445nm is 1.55~1.80
2) IR absorption spectrum complies with one of standard sample
3) It appears flame reaction of sodium salt   

PH: 6.5-8.0
Absorption coefficient: 190-210
Rifamycin B: 0.5% max.
Rifamycin S: 2.0% max.
Other related substance: 2.0% max.
Heavy metal: 10ppm max.
Moisture: 12.0-17.0%
Bacterial endotoxins: 0.50 I.U./mg max.
Abnormal toxicity test (ATT): Complies

Package: 25kg/fibre drum