Silybin B

Name: Silybin B
Brand: Zemixal
SKU: ZX-032485

Reference StandardAvailable on request

Silybin B (CAS 142797-34-0) supplier Zemixal: C25H22O10, COA and SDS with every lot, worldwide shipping. Catalogue no. ZX-032485.

Pack sizes

CAS number142797-34-0

FormulaC₂₅H₂₂O₁₀

Molar mass482.4 g/mol

Physical formSolid

HS code38229090

InChIKeySEBFKMXJBCUCAI-WAABAYLZSA-N

IUPAC name(2R,3R)-3,5,7-trihydroxy-2-[(2S,3S)-3-(4-hydroxy-3-methoxyphenyl)-2-(hydroxymethyl)-2,3-dihydro-1,4-benzodioxin-6-yl]-2,3-dihydrochromen-4-one

About Silybin B

Zemixal lists Silybin B for laboratories that identify, quantify or control Silybin and its related substances. Identity at a glance (Reference Standard): CAS 142797-34-0, formula C25H22O10 and molar mass 482.4 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

It carries the GHS signal word Warning (H302), so wear gloves and eye protection and work with good ventilation.

Available as 10 mg, 25 mg, 50 mg and 100 mg. Larger or split packs can be arranged. Each lot travels with a certificate of analysis with characterisation data. Request pricing online and we confirm availability, documentation and freight to your country.

Reference standards for Silybin

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

Silybin 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 Silybin B
Product name	Silybin B
Catalogue number	ZX-032485
CAS number	142797-34-0
IUPAC name	(2R,3R)-3,5,7-trihydroxy-2-[(2S,3S)-3-(4-hydroxy-3-methoxyphenyl)-2-(hydroxymethyl)-2,3-dihydro-1,4-benzodioxin-6-yl]-2,3-dihydrochromen-4-one
Molecular formula	C₂₅H₂₂O₁₀
Molar mass	482.4 g/mol
Exact mass	482.1213
Grade	Reference Standard
Physical form	Solid
XLogP3	2.4
H-bond donors / acceptors	5 / 10
Topological polar surface area	155 Å²
HS code	38229090
InChIKey	SEBFKMXJBCUCAI-WAABAYLZSA-N
SMILES	COC1=C(C=CC(=C1)[C@H]2[C@@H](OC3=C(O2)C=C(C=C3)[C@@H]4[C@H](C(=O)C5=C(C=C(C=C5O4)O)O)O)CO)O
PubChem CID	1548994
Synonyms	Silibinin B, SILYBIN (A and B)(P), Legalon 70, Silymarin B, Silybin A and B, Milk thistle [NF]

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

H302Harmful if swallowed

Precautionary statements P264, P270, P301 + P317, P330, 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 Silybin 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 Silybin B

Which CAS number identifies Silybin B?

Silybin B is registered under CAS 142797-34-0. You may also see it listed as Silibinin B, SILYBIN (A and B)(P), Legalon 70. Our catalogue number for this item is ZX-032485.

What are the formula and molar mass of Silybin B?

For Silybin B, its formula is C25H22O10 and its molar mass is 482.4 g/mol. The systematic (IUPAC) name is (2R,3R)-3,5,7-trihydroxy-2-[(2S,3S)-3-(4-hydroxy-3-methoxyphenyl)-2-(hydroxymethyl)-2,3-dihydro-1,4-benzodioxin-6-yl]-2,3-dihydrochromen-4-one. InChIKey SEBFKMXJBCUCAI-WAABAYLZSA-N lets you match it in any structure database.

How is Silybin B used in pharmaceutical QC?

Silybin B is a characterised reference material linked to Silybin. 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 Silybin 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 Silybin 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 Silybin B to my country?

Yes. Because Silybin 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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