Rifaximin

Name: Rifaximin
Brand: Vaqora Chemicals
SKU: VQ-007714

About Rifaximin

Rifaximin (CAS 80621-81-4) is a high-purity reference standard of Rifaximin offered by Vaqora Chemicals with a typical assay of 99%. Formula C43H51N3O11, molecular weight 785.9 g/mol. Common synonyms include Normix and Xifaxan.

It is supplied as a solid. Reference materials should be stored sealed and away from light and moisture, as specified on the accompanying COA. The GHS classification uses the signal word “Warning”, so appropriate gloves, eye protection and ventilation are recommended.

As a reference sample of Rifaximin, it is used for identification, assay and impurity-profiling work during analytical method development, validation (AMV) and routine QC. Typical end-use sectors are pharmaceutical manufacturing and academic and industrial research.

Vaqora Chemicals supplies Rifaximin in 10 mg, 25 mg, 50 mg and 100 mg packs, each shipped with a Certificate of Analysis (COA), and exports worldwide. Stock is available for quick dispatch.

Typical applications

Identification & assay
Method development & validation
QC reference material

Industries

Related to Rifaximin

View every impurity, metabolite and intermediate we list for Rifaximin.

Rifaximin impurities

Specifications & identifiers

Chemical identifiers
Product name	Rifaximin
Catalogue No.	VQ-007714
CAS Number	80621-81-4
IUPAC name	[(7S,9E,11S,12R,13S,14R,15R,16R,17S,18S,19E,21Z)-2,15,17,36-tetrahydroxy-11-methoxy-3,7,12,14,16,18,22,30-octamethyl-6,23-dioxo-8,37-dioxa-24,27,33-triazahexacyclo[23.10.1.14,7.05,35.026,34.027,32]heptatriaconta-1(35),2,4,9,19,21,25(36),26(34),28,30,32-undecaen-13-yl] acetate
Molecular formula	C₄₃H₅₁N₃O₁₁
Molecular weight	785.9 g/mol
Exact mass	785.3524
Grade	Reference Standard
Purity / assay	99%
HSN code	38229090
InChIKey	NZCRJKRKKOLAOJ-XRCRFVBUSA-N
SMILES	C[C@H]1/C=C/C=C(\C(=O)NC2=C(C3=C(C4=C(C(=C3O)C)O[C@@](C4=O)(O/C=C/[C@@H]([C@H]([C@H]([C@@H]([C@@H]([C@@H]([C@H]1O)C)O)C)OC(=O)C)C)OC)C)C5=C2N6C=CC(=CC6=N5)C)O)/C
PubChem CID	6436173

Physical properties
Physical form	Solid
LogP (XLogP3)	6.9
H-bond donors / acceptors	5 / 12
TPSA	198 Å²
Synonyms	Normix, Xifaxan, Rifamycin L 105, 4-Deoxy-4'-methylpyridol[1',2'-1,2]imidazo[5,4-c]rifamycin SV, Rifacol, Fatroximin, Rifaxidin, Rifaximine, Rifamycin L 105SV, 4-Deoxy-4'-methylpyrido(1',2'-1,2)imidazo(5,4-c)rifamycin SV, 4-deoxy-4'-methylpyrido(1',2'-1,2)imidazo(5,4C)rifamycin, Rifamixin

Safety & hazard information (GHS)

Harmful / irritant

Health hazard

Signal word: Warning

Hazard statements

H312Harmful in contact with skin
H332Harmful if inhaled
H335May cause respiratory irritation
H361Suspected of damaging fertility or the unborn child

Precautionary statements: P203, P261, P271, P280, P302 + P352, P304 + P340, P317, P318, P319, P321, P362 + P364, P403 + P233, P405, P501

Classification is indicative (aggregated GHS notifications) and may vary by grade and concentration. Always refer to the SDS supplied with your lot.

Documents

Safety Data Sheet (SDS)16-section GHS · on request Certificate of AnalysisTypical / batch COA · on request Specification sheetTDS / MOA · on request

Other grades of CAS 80621-81-4

Reference Standard

Rifaximin Beta Polymorphic Form

CAS: 80621-81-4
Formula: C₄₃H₅₁N₃O₁₁
MW: 785.9 g/mol

In stock

Frequently asked questions

What is the CAS number of Rifaximin?

The CAS Registry Number of Rifaximin is 80621-81-4. It is also known as Normix, Xifaxan, Rifamycin L 105.

What is the molecular formula and molecular weight of Rifaximin?

Rifaximin has the molecular formula C43H51N3O11 and a molecular weight of 785.9 g/mol.

What is Rifaximin used for?

Rifaximin is supplied as a characterised reference material related to Rifaximin. It is used for analytical method development and validation (AMV), impurity profiling, stability studies and quality control, and in ANDA/DMF regulatory filings.

Which grade and pack sizes of Rifaximin can I order?

We supply Rifaximin in Reference Standard (99%) grade, in 10 mg, 25 mg, 50 mg, 100 mg, 250 mg, 500 mg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Rifaximin?

Yes. Every lot of Rifaximin is shipped with a batch-specific Certificate of Analysis, and a 16-section GHS Safety Data Sheet is provided with the quotation and the shipment.

Can Rifaximin be shipped internationally?

Yes. Rifaximin is classified as hazardous, so it is packed in UN-approved packaging and shipped as dangerous goods under IATA/IMDG rules. We export worldwide on EXW, FOB, CIF and DAP terms.