Rifamycin B

Name: Rifamycin B
Brand: Vaqora Chemicals
SKU: VQ-027813

About Rifamycin B

Vaqora Chemicals supplies Rifamycin B, an impurity of Rifamycin registered under CAS number 13929-35-6. Formula C39H49NO14, molecular weight 755.8 g/mol. It is also known as Nancimycin or 4-O-(Carboxymethyl)rifamycin.

The product is provided as a solid. Reference materials should be stored sealed and away from light and moisture, as specified on the accompanying COA. It carries the GHS signal word “Warning” with 1 hazard statement. Review the Safety Data Sheet before use.

This Rifamycin impurity supports analytical method development and validation (AMV), batch release testing and the impurity sections of ANDA and DMF filings. Buyers come mainly from pharmaceutical manufacturing and academic and industrial research.

Available in 10 mg, 25 mg, 50 mg and 100 mg packs, Rifamycin B is dispatched with a Certificate of Analysis (COA) to destinations worldwide.

Typical applications

Analytical method development
Method validation (AMV)
QC release testing
ANDA / DMF filings

Industries

Related to Rifamycin

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

Rifamycin impurities

Specifications & identifiers

Chemical identifiers
Product name	Rifamycin B
Catalogue No.	VQ-027813
CAS Number	13929-35-6
IUPAC name	2-[[(7S,9E,11S,12R,13S,14R,15R,16R,17S,18S,19E,21Z)-13-acetyloxy-2,15,17,29-tetrahydroxy-11-methoxy-3,7,12,14,16,18,22-heptamethyl-6,23-dioxo-8,30-dioxa-24-azatetracyclo[23.3.1.14,7.05,28]triaconta-1(29),2,4,9,19,21,25,27-octaen-27-yl]oxy]acetic acid
Molecular formula	C₃₉H₄₉NO₁₄
Molecular weight	755.8 g/mol
Exact mass	755.3153
Grade	Reference Standard
HSN code	38229090
InChIKey	SQTCRTQCPJICLD-KTQDUKAHSA-N
SMILES	C[C@H]1/C=C/C=C(\C(=O)NC2=CC(=C3C(=C2O)C(=C(C4=C3C(=O)[C@](O4)(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)C)O)OCC(=O)O)/C
PubChem CID	5459948

Physical properties
Physical form	Solid
LogP (XLogP3)	4.8
H-bond donors / acceptors	6 / 14
TPSA	228 Å²
Synonyms	Nancimycin, 4-O-(Carboxymethyl)rifamycin, Nacimycin, Rifomycin B, 4-O-(Carboxymethyl)-Rifamycin

Safety & hazard information (GHS)

Harmful / irritant

Signal word: Warning

Hazard statements

H319Causes serious eye irritation

Precautionary statements: P264 + P265, P280, P305 + P351 + P338, P337 + P317

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

Frequently asked questions

What is the CAS number of Rifamycin B?

The CAS Registry Number of Rifamycin B is 13929-35-6. It is also known as Nancimycin, 4-O-(Carboxymethyl)rifamycin, Nacimycin.

What is the molecular formula and molecular weight of Rifamycin B?

Rifamycin B has the molecular formula C39H49NO14 and a molecular weight of 755.8 g/mol.

What is Rifamycin B used for?

Rifamycin B is supplied as a characterised reference material related to Rifamycin. 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 Rifamycin B can I order?

We supply Rifamycin B in Reference Standard grade, in 10 mg, 25 mg, 50 mg, 100 mg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Rifamycin B?

Yes. Every lot of Rifamycin B 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 Rifamycin B be shipped internationally?

Yes. Rifamycin B 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.