Withanolide B

Name: Withanolide B
Brand: Zemixal
SKU: ZX-036403

Reference StandardAvailable on request

Buy Withanolide B (CAS 56973-41-2) from Zemixal: C28H38O5, COA and SDS with every lot, worldwide shipping. Catalogue no. ZX-036403.

Pack sizes

CAS number56973-41-2

FormulaC₂₈H₃₈O₅

Molar mass454.6 g/mol

Physical formSolid

HS code38229090

InChIKeyZTEVDTFJUUJBLP-MBMSZCMESA-N

IUPAC name(1S,2S,4S,5R,10R,11S,14R,15R,18S)-15-[(1S)-1-[(2R)-4,5-dimethyl-6-oxo-2,3-dihydropyran-2-yl]ethyl]-5-hydroxy-10,14-dimethyl-3-oxapentacyclo[9.7.0.02,4.05,10.014,18]octadec-7-en-9-one

About Withanolide B

Zemixal lists Withanolide B for laboratories that identify, quantify or control Withaferin A and its related substances. For your records (Reference Standard), the material is defined by CAS 56973-41-2, formula C28H38O5 and molar mass 454.6 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

Standard pack sizes are 10 mg, 25 mg, 50 mg and 100 mg, and custom quantities are quoted on request. 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 Withaferin A

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

Withaferin A 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 Withanolide B
Product name	Withanolide B
Catalogue number	ZX-036403
CAS number	56973-41-2
IUPAC name	(1S,2S,4S,5R,10R,11S,14R,15R,18S)-15-[(1S)-1-[(2R)-4,5-dimethyl-6-oxo-2,3-dihydropyran-2-yl]ethyl]-5-hydroxy-10,14-dimethyl-3-oxapentacyclo[9.7.0.02,4.05,10.014,18]octadec-7-en-9-one
Molecular formula	C₂₈H₃₈O₅
Molar mass	454.6 g/mol
Exact mass	454.2719
Grade	Reference Standard
Physical form	Solid
XLogP3	4.7
H-bond donors / acceptors	1 / 5
Topological polar surface area	76.1 Å²
HS code	38229090
InChIKey	ZTEVDTFJUUJBLP-MBMSZCMESA-N
SMILES	CC1=C(C(=O)O[C@H](C1)[C@@H](C)[C@H]2CC[C@@H]3[C@@]2(CC[C@H]4[C@H]3[C@H]5[C@H](O5)[C@@]6([C@@]4(C(=O)C=CC6)C)O)C)C
PubChem CID	14236711
Synonyms	(5alpha,6alpha,7alpha,22R)-5-Hydroxy-6,7:22,26-diepoxyergosta-2,24-diene-1,26-dione, Lycium substance B, (22R)-5-Hydroxy-5alpha,6alpha,7alpha-6,7:22,26-diepoxyergosta-2,24-diene-1,26-dione

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

Safety and GHS hazards

H413May cause long lasting harmful effects to aquatic life

Precautionary statements P273, P501

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 Withanolide 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 Withanolide B

Which CAS number identifies Withanolide B?

Withanolide B is registered under CAS 56973-41-2. You may also see it listed as (5alpha,6alpha,7alpha,22R)-5-Hydroxy-6,7:22,26-diepoxyergosta-2,24-diene-1,26-dione, Lycium substance B, (22R)-5-Hydroxy-5alpha,6alpha,7alpha-6,7:22,26-diepoxyergosta-2,24-diene-1,26-dione. Our catalogue number for this item is ZX-036403.

What are the formula and molar mass of Withanolide B?

For Withanolide B, its formula is C28H38O5 and its molar mass is 454.6 g/mol. InChIKey ZTEVDTFJUUJBLP-MBMSZCMESA-N lets you match it in any structure database.

How is Withanolide B used in pharmaceutical QC?

Withanolide B is a characterised reference material linked to Withaferin A. 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 Withanolide 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 Withanolide 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 Withanolide B to my country?

Yes. Withanolide B ships worldwide by express courier, air cargo or sea freight, quoted on the Incoterm you prefer, with full export documents.

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