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Pharmacopeial Impurities (EP / USP / BP)

Captopril EP Impurity E

Reference StandardAvailable on request

Captopril EP Impurity E (CAS 23500-15-4) supplier Zemixal. Lab and bulk packs, batch COA, fast global delivery. Catalogue no. ZX-021024.

Pack sizes
Captopril EP Impurity E chemical structure
CAS number23500-15-4
FormulaC9H15NO3
Molar mass185.22 g/mol
Physical formSolid
HS code38229090
InChIKeyWKQUFVTUGGLNNO-ZETCQYMHSA-N
IUPAC name(2S)-1-(2-methylpropanoyl)pyrrolidine-2-carboxylic acid

About Captopril EP Impurity E

Analytical teams working on Captopril use Captopril EP Impurity E as a qualified comparison standard. Identity at a glance (Reference Standard): CAS 23500-15-4, formula C9H15NO3 and molar mass 185.22 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

Safe handling

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

Available as 10 mg, 25 mg, 50 mg and 100 mg. Larger or split packs can be arranged. You receive a certificate of analysis with characterisation data with each order. Send an enquiry through the quote panel and you get a formal offer with Incoterms and delivery time.

Reference standards for Captopril

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

Captopril 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 Captopril EP Impurity E
Product nameCaptopril EP Impurity E
Catalogue numberZX-021024
CAS number23500-15-4
IUPAC name(2S)-1-(2-methylpropanoyl)pyrrolidine-2-carboxylic acid
Molecular formulaC9H15NO3
Molar mass185.22 g/mol
Exact mass185.1052
GradeReference Standard
Physical formSolid
XLogP30.6
H-bond donors / acceptors1 / 3
Topological polar surface area57.6 Ų
HS code38229090
InChIKeyWKQUFVTUGGLNNO-ZETCQYMHSA-N
SMILESCC(C)C(=O)N1CCC[C@H]1C(=O)O
PubChem CID15324300
SynonymsCaptopril - Impurity E, isobutyrylproline, L-Proline, 1-(2-methyl-1-oxopropyl)-, Captopril Impurity E, Proline, 1-isobutyryl-, L, 1-Isobutyrylproline, (-)-, Captopril specified impurity E, (S)-1-Isobutyrylpyrrolidine-2-carboxylic acid, 1-isobutyryl-L-proline, 1-(2-Methyl-1-oxopropyl)-L-proline, (2S)-1-[2-Methylpropanoyl]-pyrrolidine-2-carboxylic Acid, N-isobutyrylproline

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 Captopril EP Impurity E
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 Captopril EP Impurity E

Which CAS number identifies Captopril EP Impurity E?
Captopril EP Impurity E is registered under CAS 23500-15-4. You may also see it listed as Captopril - Impurity E, isobutyrylproline, L-Proline, 1-(2-methyl-1-oxopropyl)-. Our catalogue number for this item is ZX-021024.
What are the formula and molar mass of Captopril EP Impurity E?
For Captopril EP Impurity E, its formula is C9H15NO3 and its molar mass is 185.22 g/mol. The systematic (IUPAC) name is (2S)-1-(2-methylpropanoyl)pyrrolidine-2-carboxylic acid. InChIKey WKQUFVTUGGLNNO-ZETCQYMHSA-N lets you match it in any structure database.
How is Captopril EP Impurity E used in pharmaceutical QC?
Captopril EP Impurity E is a characterised reference material linked to Captopril. 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 Captopril EP Impurity E?
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 Captopril EP Impurity E?
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 Captopril EP Impurity E to my country?
Yes. Because Captopril EP Impurity E 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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