CAS No.: 80621-81-4   Request for quotation


Rifaximin Specification (EP8)

Appearance Red-orange, crystalline,hygroscopic powder.   Standard Packing 1kg/bag or per customer request
Solubility Practically insoluble in water,soluble in acetone and in methanol.   Inventory Normally we have Rifaximin in stock
Identification IR conforms to the standard   Rifaximin physical parameters
Related Substances     CAS No: 80621-81-4
a) Sum of impurities D and H < 0.5%   Formula C43H51N3O11
b) Unspecified impurities < 0.1%   Molecular Weight 786
c) Total impurity < 1.0%   Synonym  
d) Disregard limit < 0.05%   Structure Rifaximin 
Heavy Metals < 20ppm    
Water ≤ 4.5%    
Sulphated Ash < 0.1%    
Assay 97.0% to 102.0% (anhydrous substance)
Residual Solvents  
Dichloromethane < 600ppm
Cyclohexane < 3880ppm
Hexane < 290ppm
Ethanol < 5000ppm
2-Methoxyethanol < 50ppm
Ethyl acetate < 5000ppm
Tetrahydrofuran < 720ppm
Microbial Limit  
1) Bacteria < 1000/g
2) Mold and yeast < 1000/g
3) Escherichia coli Not detected
4) Mildew and mite Not detected
Assay Not less than 950μg and not more than 1020μg of C46H62N4O11 per mg,calculated on the anhydrous basis.
Certificate of Analysis Rifaximin COA      
Literature Rifaximin literature      
MSDS Rifaximin MSDS      
Related Product      
Rifabutin (CAS #: 72559-06-9)      

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