Rifaximin Impurity B

利福昔明杂质B

Also known as: Rifaximin Impurity B, Rifaximin impurity B, Rifaximin Impurity 1, (2S,16Z,18E,20S,21S,22R,23R,24R,25S,26R,27S,28E)-25-(Acetyloxy)-6,21,23-trihydroxy-27-methoxy-2,4,16,20,22,24,26-heptamethyl-11-methylene-2,7-(epoxypentadeca[1,11,13]trienimino)benzofuro[4,5-e]pyrido[1,2-a]benzimidazole-1,5,15(2H,11H)-trione

Rifaximin Impurity B (CAS 1351775-04-6) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C43H49N3O11 and a molecular weight of 783.875 g/mol. It is also known as Rifaximin impurity B, Rifaximin Impurity 1 and (2S,16Z,18E,20S,21S,22R,23R,24R,25S,26R,27S,28E)-25-(Acetyloxy)-6,21,23-trihydroxy-27-methoxy-2,4,16,20,22,24,26-heptamethyl-11-methylene-2,7-(epoxypentadeca[1,11,13]trienimino)benzofuro[4,5-e]pyrido[1,2-a]benzimidazole-1,5,15(2H,11H)-trione. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.: 1351775-04-6
Jingsj CID: J-1529370-7
Molecular Formula: C₄₃H₄₉N₃O₁₁
Chinese Name: 利福昔明杂质B
Molecular Weight: 783.875 g/mol
Category: Organic Compounds
Last updated: 8/21/2026

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Frequently Asked Questions

What is the CAS number of Rifaximin Impurity B?

The CAS number of Rifaximin Impurity B is 1351775-04-6.

What are the molecular formula and molecular weight of Rifaximin Impurity B?

Rifaximin Impurity B has molecular formula C43H49N3O11 and molecular weight 783.875 g/mol.

Data compiled from public chemical databases and supplier catalogs; supplier offers are provided by suppliers.

Last updated: 8/21/2026

How to cite: Jingsj. "Rifaximin Impurity B (CAS 1351775-04-6)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1529370-7 (accessed 2026-10-24).

Data for reference only; verify specifications, grades and regulatory status with suppliers before purchase.