Pharmacopeial Impurities (EP / USP / BP)

Entecavir EP Impurity B

Name: Entecavir EP Impurity B
Brand: Zemixal
SKU: ZX-021570

Reference StandardAvailable on request

Entecavir EP Impurity B (CAS 1367369-77-4) supplier Zemixal. Request a quote with price, lead time and documents. Catalogue no. ZX-021570.

Pack sizes

Entecavir EP Impurity B chemical structure

CAS number1367369-77-4

FormulaC₁₂H₁₅N₅O₃

Molar mass277.28 g/mol

Physical formSolid

HS code38229090

InChIKeyQDGZDCVAUDNJFG-CSMHCCOUSA-N

IUPAC name2-amino-9-[(1S,3S,4S)-4-hydroxy-3-(hydroxymethyl)-2-methylidenecyclopentyl]-1H-purin-6-one

About Entecavir EP Impurity B

Analytical teams working on Entecavir use Entecavir EP Impurity B as a qualified comparison standard. For your records (Reference Standard), the material is defined by CAS 1367369-77-4, formula C12H15N5O3 and molar mass 277.28 g/mol. It is handled as a solid.

Common uses in the lab and plant

Pharmacopeial method verification
Impurity profiling
QC release testing
ANDA / DMF filings

Order it in 10 mg, 25 mg, 50 mg and 100 mg packs or ask for a bulk quotation. 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 Entecavir

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

Entecavir standards

Typical uses

Pharmacopeial method verification
Impurity profiling
QC release testing
ANDA / DMF filings

Applications

Pharmaceutical Manufacturing and QC Research Labs and Universities

Grade guides

Ph. Eur. Grade (European Pharmacopoeia)

Specifications and identifiers

Specifications of Entecavir EP Impurity B
Product name	Entecavir EP Impurity B
Catalogue number	ZX-021570
CAS number	1367369-77-4
IUPAC name	2-amino-9-[(1S,3S,4S)-4-hydroxy-3-(hydroxymethyl)-2-methylidenecyclopentyl]-1H-purin-6-one
Molecular formula	C₁₂H₁₅N₅O₃
Molar mass	277.28 g/mol
Exact mass	277.1175
Grade	Reference Standard
Physical form	Solid
XLogP3	-1.3
H-bond donors / acceptors	4 / 5
Topological polar surface area	126 Å²
HS code	38229090
InChIKey	QDGZDCVAUDNJFG-CSMHCCOUSA-N
SMILES	C=C1[C@H](C[C@@H]([C@@H]1CO)O)N2C=NC3=C2N=C(NC3=O)N
PubChem CID	136217872
Synonyms	Entecavir USP Impurity B, Entecavir impurity B, Entecavir Monohydrate - Impurity B, 3'-epi-Entecavir, Entecavir 3-epimer, 3-Epi-Entecavir, 9-((1S,3S,4S)-4-Hydroxy-3-(hydroxymethyl)-2-methylenecyclopentyl)guanine, 3AE-epi-Entecavir, Entecavir 3-epimer impurity, Entecavir (1S,3S,4S) Diastereomer

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

Safety and GHS hazards

No GHS classification is on file for this item. Handle it as an unknown laboratory chemical and request the SDS with your quotation.

Pack sizes

Pack sizes of Entecavir EP Impurity 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 Entecavir EP Impurity B

Which CAS number identifies Entecavir EP Impurity B?

Entecavir EP Impurity B is registered under CAS 1367369-77-4. You may also see it listed as Entecavir USP Impurity B, Entecavir impurity B, Entecavir Monohydrate - Impurity B. Our catalogue number for this item is ZX-021570.

What are the formula and molar mass of Entecavir EP Impurity B?

For Entecavir EP Impurity B, its formula is C12H15N5O3 and its molar mass is 277.28 g/mol. The systematic (IUPAC) name is 2-amino-9-[(1S,3S,4S)-4-hydroxy-3-(hydroxymethyl)-2-methylidenecyclopentyl]-1H-purin-6-one. InChIKey QDGZDCVAUDNJFG-CSMHCCOUSA-N lets you match it in any structure database.

How is Entecavir EP Impurity B used in pharmaceutical QC?

Entecavir EP Impurity B is a characterised reference material linked to Entecavir. 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 Entecavir EP Impurity 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 Entecavir EP Impurity 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 Entecavir EP Impurity B to my country?

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

More Entecavir standards

More in Pharmacopeial Impurities (EP / USP / BP)

Entecavir EP Impurity F

CAS: 649761-24-0
Formula: C₂₇H₃₁N₅O₂Si
MW: 485.7 g/mol

ZX-021569

4-Dehydroxy-4-dimethylhydroxysilyl Entecavir

CAS: 870614-82-7
Formula: C₁₄H₂₁N₅O₃Si
MW: 335.43 g/mol

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Entecavir EP Impurity E

CAS: 2349444-69-3
Formula: C₁₃H₁₇N₅O₄
MW: 307.31 g/mol

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Entecavir EP Impurity C

CAS: 2204369-23-1
Formula: C₁₂H₁₅N₅O₄
MW: 293.28 g/mol

ZX-021567

Entecavir EP Impurity D

CAS: 1367369-80-9
Formula: C₁₂H₁₅N₅O₃
MW: 277.28 g/mol

ZX-021566

Entecavir Monohydrate

CAS: 209216-23-9
Formula: C₁₂H₁₇N₅O₄
MW: 295.29 g/mol

ZX-021565

1R,3R,4R Entecavir

CAS: 1367369-76-3
Formula: C₁₂H₁₅N₅O₃
MW: 277.28 g/mol

ZX-024508

2-Amino-9-((1S,3R,4R)-4-(benzyloxy)-3-((benzyloxy)methyl)-2-methylenecyclopentyl)-1,9-dihydro-6H-purin-6-one

CAS: 1354695-85-4
Formula: C₂₆H₂₇N₅O₃
MW: 457.5 g/mol

ZX-024509

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