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Pharmacopeial Impurities (EP / USP / BP)

Entecavir EP Impurity A

Reference StandardAvailable on request

Order Entecavir EP Impurity A (CAS 1367369-78-5) online at Zemixal. Request a quote with price, lead time and documents.

Pack sizes
Entecavir EP Impurity A chemical structure
CAS number1367369-78-5
FormulaC12H15N5O3
Molar mass277.28 g/mol
Physical formSolid
HS code38229090
InChIKeyQDGZDCVAUDNJFG-RNJXMRFFSA-N
IUPAC name2-amino-9-[(1R,3R,4S)-4-hydroxy-3-(hydroxymethyl)-2-methylidenecyclopentyl]-1H-purin-6-one

About Entecavir EP Impurity A

Analytical teams working on Entecavir use Entecavir EP Impurity A as a qualified comparison standard. Key data (Reference Standard): CAS 1367369-78-5, formula C12H15N5O3 and molar mass 277.28 g/mol. It is handled as a solid.

Typical applications

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

Storage and safety notes

Classified under GHS with signal word Warning and hazard statements H302 and H351. Read the SDS before first use.

Order it in 10 mg, 25 mg, 50 mg and 100 mg packs or ask for a bulk quotation. Every shipment includes a certificate of analysis with characterisation data. Send an enquiry through the quote panel and you get a formal offer with Incoterms and delivery time.

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 QCResearch Labs and Universities

Grade guides

Ph. Eur. Grade (European Pharmacopoeia)

Specifications and identifiers

Specifications of Entecavir EP Impurity A
Product nameEntecavir EP Impurity A
Catalogue numberZX-029272
CAS number1367369-78-5
IUPAC name2-amino-9-[(1R,3R,4S)-4-hydroxy-3-(hydroxymethyl)-2-methylidenecyclopentyl]-1H-purin-6-one
Molecular formulaC12H15N5O3
Molar mass277.28 g/mol
Exact mass277.1175
GradeReference Standard
Physical formSolid
XLogP3-1.3
H-bond donors / acceptors4 / 5
Topological polar surface area126 Ų
HS code38229090
InChIKeyQDGZDCVAUDNJFG-RNJXMRFFSA-N
SMILESC=C1[C@@H](C[C@@H]([C@H]1CO)O)N2C=NC3=C2N=C(NC3=O)N
PubChem CID135743573
SynonymsEntecavir 1-epimer, 1R,3R,4S Entecavir, Entecavir Monohydrate - Impurity A, 9-((1R,3R,4S)-4-Hydroxy-3-(hydroxymethyl)-2-methylenecyclopentyl)guanine, 1'-epi-Entecavir, Entecavir Impurity A, Entecavir Impurity 126 (1R,3R,4S)

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

Safety and GHS hazards

GHS07 Irritant or harmful
Irritant or harmful
GHS08 Health hazard
Health hazard

Signal word Warning

  • H302Harmful if swallowed
  • H351Suspected of causing cancer

Precautionary statements P203, P264, P270, P280, P301 + P317, P318, P330, P405, 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 Entecavir EP Impurity A
10 mgQuoted on request
25 mgQuoted on request
50 mgQuoted on request
100 mgQuoted 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 A

Which CAS number identifies Entecavir EP Impurity A?
Entecavir EP Impurity A is registered under CAS 1367369-78-5. You may also see it listed as Entecavir 1-epimer, 1R,3R,4S Entecavir, Entecavir Monohydrate - Impurity A. Our catalogue number for this item is ZX-029272.
What are the formula and molar mass of Entecavir EP Impurity A?
For Entecavir EP Impurity A, its formula is C12H15N5O3 and its molar mass is 277.28 g/mol. The systematic (IUPAC) name is 2-amino-9-[(1R,3R,4S)-4-hydroxy-3-(hydroxymethyl)-2-methylidenecyclopentyl]-1H-purin-6-one. InChIKey QDGZDCVAUDNJFG-RNJXMRFFSA-N lets you match it in any structure database.
How is Entecavir EP Impurity A used in pharmaceutical QC?
Entecavir EP Impurity A 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 A?
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 A?
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 A to my country?
Yes. Because Entecavir EP Impurity A 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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