Rifamycin B

Name: Rifamycin B
Brand: Zemixal
SKU: ZX-026721

Reference StandardAvailable on request

Order Rifamycin B (CAS 13929-35-6) online at Zemixal. Request a quote with price, lead time and documents. Packs from 10 mg.

Pack sizes

CAS number13929-35-6

FormulaC₃₉H₄₉NO₁₄

Molar mass755.8 g/mol

Physical formSolid

HS code38229090

InChIKeySQTCRTQCPJICLD-KTQDUKAHSA-N

About Rifamycin B

Analytical teams working on Rifamycin use Rifamycin B as a qualified comparison standard. Identity at a glance (Reference Standard): CAS 13929-35-6, formula C39H49NO14 and molar mass 755.8 g/mol. It is handled as a solid.

Use cases we see most often

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

Handling and storage

Classified under GHS with signal word Warning and hazard statements H319. Read the SDS before first use.

Available as 10 mg, 25 mg, 50 mg and 100 mg. Larger or split packs can be arranged. You receive a certificate of analysis with characterisation data with each order. Send an enquiry through the quote panel and you get a formal offer with Incoterms and delivery time.

Reference standards for Rifamycin

See every impurity, metabolite and related compound we list for this API.

Rifamycin standards

Typical uses

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

Applications

Pharmaceutical Manufacturing and QC Research Labs and Universities

Specifications and identifiers

Specifications of Rifamycin B
Product name	Rifamycin B
Catalogue number	ZX-026721
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
Molar mass	755.8 g/mol
Exact mass	755.3153
Grade	Reference Standard
Physical form	Solid
XLogP3	4.8
H-bond donors / acceptors	6 / 14
Topological polar surface area	228 Å²
HS 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
Synonyms	Nancimycin, 4-O-(Carboxymethyl)rifamycin, Nacimycin, Rifomycin B, 4-O-(Carboxymethyl)-Rifamycin

Lot values are stated on the batch certificate of analysis. Ask for a typical COA with your quotation.

Safety and GHS hazards

Irritant or harmful

Signal word Warning

H319Causes serious eye irritation

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

Classification summarised from public GHS notifications. It can vary with grade and concentration, so always follow the SDS supplied with your lot.

Pack sizes

Pack sizes of Rifamycin B
10 mg	Quoted on request
25 mg	Quoted on request
50 mg	Quoted on request
100 mg	Quoted on request

Need a different size? Bulk drums and custom packing are quoted on request through the quote form on this page.

Questions about Rifamycin B

Which CAS number identifies Rifamycin B?

Rifamycin B is registered under CAS 13929-35-6. You may also see it listed as Nancimycin, 4-O-(Carboxymethyl)rifamycin, Nacimycin. Our catalogue number for this item is ZX-026721.

What are the formula and molar mass of Rifamycin B?

For Rifamycin B, its formula is C39H49NO14 and its molar mass is 755.8 g/mol. InChIKey SQTCRTQCPJICLD-KTQDUKAHSA-N lets you match it in any structure database.

How is Rifamycin B used in pharmaceutical QC?

Rifamycin B is a characterised reference material linked to Rifamycin. Laboratories use it to identify and quantify this impurity during method development and validation, stability work, batch release testing and regulatory submissions.

What grade and pack sizes are available for Rifamycin B?

This listing is Reference Standard grade. Standard packs are 10 mg, 25 mg, 50 mg, 100 mg. Larger quantities and custom packing can be quoted on request.

Which documents come with Rifamycin B?

Each lot ships with a batch certificate of analysis and a 16-section GHS safety data sheet. A typical COA or specification sheet can be shared with the quotation before you order.

Can Zemixal ship Rifamycin B to my country?

Yes. Because Rifamycin B is classed as hazardous, it travels in UN-approved packaging as dangerous goods under IATA or IMDG rules, with the export paperwork your broker needs.

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