Withanolide B

Name: Withanolide B
Brand: Vaqora Chemicals
SKU: VQ-042969

About Withanolide B

Vaqora Chemicals supplies Withanolide B, an impurity of Withaferin A registered under CAS number 56973-41-2. With the molecular formula C28H38O5, it has a molar mass of 454.6 g/mol. Alternative names: Lycium substance B.

It is supplied as a solid. Keep the vial tightly closed, protected from light and humidity, at the temperature stated on the Certificate of Analysis. Handle it with standard laboratory precautions and appropriate personal protective equipment.

This Withaferin A 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.

Vaqora Chemicals supplies Withanolide B in 10 mg, 25 mg, 50 mg and 100 mg packs, each shipped with a Certificate of Analysis (COA), and exports worldwide.

Typical applications

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

Industries

Related to Withaferin A

View every impurity, metabolite and intermediate we list for Withaferin A.

Withaferin A impurities

Specifications & identifiers

Chemical identifiers
Product name	Withanolide B
Catalogue No.	VQ-042969
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
Molecular weight	454.6 g/mol
Exact mass	454.2719
Grade	Reference Standard
HSN 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

Physical properties
Physical form	Solid
LogP (XLogP3)	4.7
H-bond donors / acceptors	1 / 5
TPSA	76.1 Å²

Safety & hazard information (GHS)

Hazard statements

H413May cause long lasting harmful effects to aquatic life

Precautionary statements: P273, 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

Frequently asked questions

What is the CAS number of Withanolide B?

The CAS Registry Number of Withanolide B is 56973-41-2. It is also known 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.

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

Withanolide B has the molecular formula C28H38O5 and a molecular weight of 454.6 g/mol.

What is Withanolide B used for?

Withanolide B is supplied as a characterised reference material related to Withaferin A. 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 Withanolide B can I order?

We supply Withanolide 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 Withanolide B?

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

Yes. We export Withanolide B worldwide by air and sea freight or express courier, on EXW, FOB, CIF, CFR or DAP Incoterms, with full export documentation.