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Certificate of Analysis

Rifaximin

Molecular Formula:	C₄₃H₅₁N₃O₁₁
Molecular Weight:	785.88
CAS No.:	80621-81-4
Storage (From the date of receipt):	3 years -20°C powder
	1 year -80°C in solvent
Image:

HPLC: 99.85% purity | NMR: Consistent with structure