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Chemical product profile

HONGKUN / PRODUCT DIRECTORY

Rifamycin O | CAS 14487-05-9

A cyclic carboxymethyl-derived unit distinguishes rifamycin O within the ansamycin family. Its published role in rifamycin derivative chemistry calls for O-specific identification and a resolved related-rifamycin profile before qualification.

CAS14487-05-9
Molecular formulaC39H47NO14
Molecular weight753.8 g/mol

Product overview

A cyclic lactone-containing unit gives rifamycin O a composition distinct from rifamycin S and B. CAS 14487-05-9 identifies the O form, C39H47NO14, on a large ansamycin framework with multiple oxygen functions and defined stereochemical features. Rifamycin O is an intermediate in published semisynthetic routes to pyrido-imidazo rifamycin derivatives. The intended conversion should guide selection of the grade and the related-substances profile. An O-selective assay establishes the component needed for charging, while structural identification confirms the complete cyclic framework. Discuss chromatographic separation from relevant O/B/S family members and the treatment of water or residual solvents when comparing results from different proposed sources.

Chemical identity

Chemical name
Rifamycin O
CAS number
14487-05-9
Molecular formula
C39H47NO14
Molecular weight
753.8 g/mol

Application context

Rifamycin O is an input in published semisynthetic routes to pyrido-imidazo rifamycin derivatives. Its cyclic carboxymethyl-derived unit distinguishes it from rifamycin S and B. An O-selective assay and separation of the relevant rifamycin components are central to matching material to the receiving conversion. Agree the reportable related substances with appropriate reference materials, and state water or residual-solvent corrections when content is used for mass-based charging.

Chemistry and synthetic role

The O designation reflects a particular cyclic unit on an already complex ansamycin nucleus. The free phenolic, ester and macrocyclic features are part of the complete structure; identifying one chromophore does not demonstrate all of them.

Quality review

Identify the O cyclic unit

Confirm the O structure with suitable reference evidence; a rifamycin family label or molecular absorption alone is insufficient.

Resolve neighbouring rifamycins

Agree chromatographic separation of O from B, S and other components relevant to the proposed production route.

Define content for charging

Specify mass-assay basis and any water or residual-solvent correction rather than using total rifamycin area as a charging factor.

Preparing a specification

Name rifamycin O, CAS 14487-05-9, and the intended derivative programme. Request an O-selective assay, the relevant rifamycin impurity profile and the agreed water/solvent basis.

Packaging and storage

Confirm packaging format, net weight and transport arrangements for the selected grade, order quantity and destination. Request the applicable SDS and label to establish storage and handling conditions.

Documentation

Request the proposed specification, batch COA and current SDS. Confirm availability of the analytical methods and batch evidence relevant to the intended process. Confirm availability of structure evidence and chromatograms demonstrating O/B/S discrimination where those species are relevant.

Procurement questions

Can rifamycin S substitute for rifamycin O?

They are distinct structures. Any route change needs a separate technical assessment.

Is total rifamycin assay adequate?

Only if the method specifically establishes the O content needed by the receiving process; a summed family response alone does not.

How should rifamycin O content be reported for charging?

State the quantitative assay basis and any corrections for water or residual solvents so that the weighed quantity corresponds to the required O content.

Technical sources
  1. PubChem CID 5280468: identity properties and CAS synonymsNCBI / PubChem
  2. Rifamycin O product listingZhejiang Medicine
  3. US20200157104A1: Pyrido-imidazo rifamycinsUSPTO publication via Google Patents
  4. Rifamycin O, T65421TargetMol