72559-06-9 Categories: , ,
  • #LGM Pharma is a Rifabutin CAS# 72559-06-9 API supplier distributor based in the USA. Inquire about DMF, cGMP, price, availability, delivery, purity, and more.
  • #Questions? Call our customer API support number 1-(800)-881-8210.
  • #LGM Pharma offers this active ingredient but not the finished dosage forms.

Product Details:

  • CAS No: 72559-06-9
  • AHFC code: 08:16.0
  • Synonyms: Ansatipin Ansatipine Antibiotic LM 427 RBT Rifabutina [Spanish] Rifabutine [French] Rifabutinum [Latin]
  • ATC Code: J04AB04
  • Chemical Formula: C22H21Cl3N4O
  • Molecular Weight: 847.0047
  • Assay/Purity: Typically NLT 98%
  • DrugBank: DB00615 (APRD00094)
  • SMILES: CO[C,H]1C=CO[C,,]2(C)OC3=C(C2=O)C2=C(C(O)=C3C)C(=O)C(NC(=O)C(C)=C/C=C/[C,H](C)[C,H](O)[C,,H](C)[C,,H](O)[C,,H](C)[C,H](OC(C)=O)[C,,H]1C)=C1NC3(CCN(CC3)CC(C)C)N=C21
  • PubChem: 6323490
  • IUPAC:

Additional Details

For the prevention of disseminated Mycobacterium avium complex (MAC) disease in patients with advanced HIV infection.
Rifabutin is an antibiotic that inhibits DNA-dependent RNA polymerase activity in susceptible cells. Specifically, it interacts with bacterial RNA polymerase but does not inhibit the mammalian enzyme. It is bactericidal and has a very broad spectrum of activity against most gram-positive and gram-negative organisms (including Pseudomonas aeruginosa) and specifically Mycobacterium tuberculosis. Because of rapid emergence of resistant bacteria, use is restricted to treatment of mycobacterial infections and a few other indications. Rifabutin is well absorbed when taken orally and is distributed widely in body tissues and fluids, including the CSF. It is metabolized in the liver and eliminated in bile and, to a much lesser extent, in urine, but dose adjustments are unnecessary with renal insufficiency.
Mode of Action:
Rifabutin acts via the inhibition of DNA-dependent RNA polymerase in gram-positive and some gram-negative bacteria, leading to a suppression of RNA synthesis and cell death.
Hepatic. Of the five metabolites that have been identified, 25-O-desacetyl and 31-hydroxy are the most predominant. The former metabolite has an activity equal to the parent drug and contributes up to 10% to the total antimicrobial activity.
LD50 = 4.8 g/kg (mouse, male)
General Reference:
Products currently covered by valid US Patents are offered for R&D use in accordance with 35 USC 271(e)+A13(1). Any patent infringement and resulting liability is solely at buyer risk.

API’s From Quality Manufacturers:

  • Cost effective materials based on specific requirements
  • Small quantities for initial research and larger development quantities towards product commercialization


  • Technical packages, letters of access to filed DMFs
  • Complete assistance in any regulatory filings
  • Top quality GMP certified manufacturers
  • Have necessary regulatory credentials


Related YouTube Videos