Rifaximin CAS 80621-81-4


Molecular Formula:C43H51N3O11

Formula Weight:785.89

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Product Name: Rifaximin             CAS Number:80621-81-4         Purity: 99%

Basic Info

Product Name:Rifaximin
Other Names:2s-acetyloxy-5,6,21,23-tetrahydroxy-27-methoxy-2,4,11, 16,20,22,24,26-octamethyl-2,7-(epoxypentoeleca(1,11,13)trienimino)benzofuro[4,5-e]pyride[1,2-a]benzimidazole-1,15(2h)-dione
Place of Origin:Shandong, China
Brand Name:Zhishang Chemical
Appearance:Orange-red powder
EINECS No.:617-130-4
Storage:Cool Dry Place
Provide:Rifaximin MSDS;
Rifaximin COA

2s-acetyloxy-5,6,21,23-tetrahydroxy-27-methoxy-2,4,11, 16,20,22,24,26-octamethyl-2,7-(epoxypentoeleca(1,11,13)trienimino)benzofuro[4,5-e]pyride[1,2-a]benzimidazole-1,15(2h)-dione;XIFAXAN;normix;ole-1,15(2h)-dione,25-(acetyloxy)-5,6,21,23-tetrahydroxy-27-methoxy-2,4,11,16;rifamycinl105;rifamycinl105sv;rifaxidin;RIFAXIMIN.

Product Categories:

XIFAXAN;Intermediates & Fine Chemicals;Pharmaceuticals;Chiral Reagents;Antibiotics;API;Active Pharmaceutical Ingredients;Antibacterial

Chemical Properties:
  1. Rifaximin is an antibiotic structurally related to rifamycin. It is reported to be efficacious in the treatment of gastrointestinal infections and hepatic encephalopathy, being highly active against Gram-positive and -negative aerobic and anaerobic bacteria. Due to poor systemic absorption, rifaximin is effective in presurgical sterilization of the GI tract.It displays good activity against a wide spectrum of bacteria, including Salmonella spp., S. aureus, and E. coli.
  2. The mechanism of action of pyrazinamide is unknown, but recent findings suggest that pyrazinamide may be active either totally or in part as a pro-drug. Susceptible organisms produce pyrazinamidase, which is responsible for conversion of pyrazinamide to pyrazinoic acid intracellularly. Mutation in the pyrazinamidase gene (pncA) results in resistant strains of M . tuberculosis. Pyrazinoic acid has been shown to possess biological activity at a pH 5.4 or lower, in contract in vitro tests that show pyrazinoic acid is 8- to 16-fold less active than pyrazinamide . Pyrazinoic acid may lower the pH in the immediate surroundings of the M . tuberculosis to such an extent that the organism is unable to grow, but this physicochemical property appears to account for only some of the activity. The protonated pyrazinoic acid also can permeate the mycobacterial membrane to lower the pH of the cytoplasm. Recent evidence suggests that pyrazinoic acid decreases membrane potential in older, nonreplicating bacilli, thus decreasing membrane transport, and interferes with the energetics of the membrane.
  1. Rifaximin antibacterial, RNA synthesis inhibitor
  2. Rifaximin muscle Relaxant
  3. Rifaximin Non-absorbable semisynthetic Rifamycin antibiotic
  4. ChEBI: A semisynthetic member of the class of rifamycins and non-systemic gastrointestinal site-specific broad spectrum antibiotic. Used in the treatment of traveller’s diarrhoea, hepatic encephalopathy and irritable bowel syndrome.
  5. It is used for a variety of gastrointestinal diseases, including the treatment of traveler’s diarrhea. Preliminary results suggest clinical efficacy in the therapy of hepatic encephalopathy and of C. difficile infections.
About Us

The production base is located in Zhangqiu chemical industry park and Tai’an high-tech chemical industry park. laboratory and workshop in strict accordance with the GMP standard and the product fit national ISO9001 and ISO2000 standards.

“Zhishang” products are exported to Europe, North and South America, the Middle East, Asia Pacific and Africa area, so as to establish a long-term and stable cooperation relationship with customer in the world.

Company Info
  • Business Type: Manufacturer
  • Product Range: Additive , Chemical Auxiliary & Catalyst , Organic Chemicals
  • Products/Service: Organic Intermediate,Inorganic Chemistry, APIs, Dyestuffs And Pigments, Fragrance And Spices, Food Additives
  • Total Employees: 51~100
  • Capital (Million US $): 10000000RMB
  • Year Established: 2016
Production Capacity
  • No. of Production Lines : 8
  • No. of QC Staff : 5 -10 People
  • OEM Services Provided : yes
  • Factory Size (Sq.meters) : 3,000-5,000 square meters
  • Certificate: ISO9001 , CE , GMP , API , MSDS
  • Factory Location : Diao Town Industry Park, Zhangqiu City, Jinan City, Shandong Province, China.


Pre-Sales Service

* Prompt reply and 24 hours online, professional team to provide best price and high quality product.

* Sample testing support.

* Every batch of products will be tested to ensureits quality.

*The packing also can be according the customers` requirment.

*Any inquiries will be replied within 24 hours.

*we provide Commerical Invoice, Packing List, Bill of loading, COA , Health certificate and Origin certificate. If your markets have any special requirements, let us know.


After-Sales Service

*The fact of logistics information monitoring.

* Any questions about the product can be consulted at any time.

*Product has any problem can return.


Do you accept sample order?

We will make samples before mass production, and after sample approved, we’ll begin mass production. Doing 100% inspection during production, then do random inspection before packing.



You can get free samples for some products,you only need to pay the shipping cost or arrange a courier to us and take the samples. You can send us your product specifications and requests,we will manufacture the products according to your requests.

What’s your MOQ?

Our MOQ is 1kg. But usually we accept less quantity such as 100g on the condition that sample charge is 100% paid.

Do you supply product report?

Yes. We’ll give you product analysis report before shipping.

  Is there a discount?

Different quantity has different discount.


1. ≤50kg, Express delivery recommended, usually called as DDU service;

2. ≤500kg, Air shipping recommended, usually called as FOB, CFR, or CIF service;

3. >500kg, sea shipping recommended, usually called as FOB, CFR, or CIF service;

4. For high value products, please select air shipping and express delivery for safe.

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