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Pharmacopeial Impurities (EP / USP / BP)

Entacapone EP Impurity D

Reference StandardAvailable on request

Entacapone EP Impurity D (CAS 857629-79-9) supplier Zemixal. Lab and bulk packs, batch COA, fast global delivery. Exported from India with full paperwork.

Pack sizes
Entacapone EP Impurity D chemical structure
CAS number857629-79-9
FormulaC16H19N3O5
Molar mass333.34 g/mol
Physical formSolid
HS code38229090
InChIKeyFGJZUPPLPIHQSE-KPKJPENVSA-N
IUPAC name(E)-2-cyano-3-(3-ethoxy-4-hydroxy-5-nitrophenyl)-N,N-diethylprop-2-enamide

About Entacapone EP Impurity D

Entacapone EP Impurity D is supplied by Zemixal as a characterised reference material for Entacapone analysis. For your records (Reference Standard), the material is defined by CAS 857629-79-9, formula C16H19N3O5 and molar mass 333.34 g/mol. It is handled as a solid.

Use cases we see most often

  • 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. 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. Each lot travels with 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 Entacapone

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

Entacapone standards

Typical uses

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

Applications

Grade guides

Specifications and identifiers

Specifications of Entacapone EP Impurity D
Product nameEntacapone EP Impurity D
Catalogue numberZX-021560
CAS number857629-79-9
IUPAC name(E)-2-cyano-3-(3-ethoxy-4-hydroxy-5-nitrophenyl)-N,N-diethylprop-2-enamide
Molecular formulaC16H19N3O5
Molar mass333.34 g/mol
Exact mass333.1325
GradeReference Standard
Physical formSolid
XLogP32.8
H-bond donors / acceptors1 / 6
Topological polar surface area119 Ų
HS code38229090
InChIKeyFGJZUPPLPIHQSE-KPKJPENVSA-N
SMILESCCN(CC)C(=O)/C(=C/C1=CC(=C(C(=C1)OCC)O)[N+](=O)[O-])/C#N
PubChem CID11484393
SynonymsEntacapone EP Impurity B, Entacapone - Impurity D, 3-O-ethylentacapone, (2E)-2-cyano-3-(3-ethoxy-4-hydroxy-5-nitrophenyl)-N,N-diethylprop-2-enamide, (E)-2-Cyano-3-(3-ethoxy-4-hydroxy-5-nitrophenyl)-N,N-diethylacrylamide, (2E)-2-Cyano-3-(3-ethoxy-4-hydroxy-5-nitrophenyl)-N,N-diethyl-2-propenamide, N,N-diethyl-2-cyano-3-(3-ethoxy-4-hydroxy-5-nitrophenyl)acrylamide

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

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 Entacapone EP Impurity D
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 Entacapone EP Impurity D

Which CAS number identifies Entacapone EP Impurity D?
Entacapone EP Impurity D is registered under CAS 857629-79-9. You may also see it listed as Entacapone EP Impurity B, Entacapone - Impurity D, 3-O-ethylentacapone. Our catalogue number for this item is ZX-021560.
What are the formula and molar mass of Entacapone EP Impurity D?
For Entacapone EP Impurity D, its formula is C16H19N3O5 and its molar mass is 333.34 g/mol. The systematic (IUPAC) name is (E)-2-cyano-3-(3-ethoxy-4-hydroxy-5-nitrophenyl)-N,N-diethylprop-2-enamide. InChIKey FGJZUPPLPIHQSE-KPKJPENVSA-N lets you match it in any structure database.
How is Entacapone EP Impurity D used in pharmaceutical QC?
Entacapone EP Impurity D is a characterised reference material linked to Entacapone. 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 Entacapone EP Impurity D?
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 Entacapone EP Impurity D?
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 Entacapone EP Impurity D to my country?
Yes. Because Entacapone EP Impurity D 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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