Rifaximin CAS: [80621-81-4] formula: C43H51N3O11 Molecular Weight: 785.88 Appearance: orange or dark red powder; odorless, bitter. Acidity: 4.0-6.5 Loss on drying: not more than 7% Residue on ignition: not more than 0.2% Heavy metals: not more than 0.002% related substances: not more than 3.0% of the content: not less than 97.0% (by dry goods) Purpose: Antibiotic Storage: Save airtight dry place Packing: 10 kg / drum, 25 kg / drum or 50 kg / drum Contact Phone: Yuan Fan Tel: 027-65384468 \ 15,927,011,692