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Pharmacopeial Impurities (EP / USP / BP)

Letrozole EP Impurity A

Reference StandardAvailable on request

Buy Letrozole EP Impurity A (CAS 112809-52-6) from Zemixal. Lab and bulk packs, batch COA, fast global delivery. Packs from 10 mg.

Pack sizes
Letrozole EP Impurity A chemical structure
CAS number112809-52-6
FormulaC17H11N5
Molar mass285.3 g/mol
Physical formSolid
HS code38229090
InChIKeyBCTXUGAAOFIJGX-UHFFFAOYSA-N
IUPAC name4-[(4-cyanophenyl)-(1,2,4-triazol-4-yl)methyl]benzonitrile

About Letrozole EP Impurity A

Analytical teams working on Letrozole use Letrozole EP Impurity A as a qualified comparison standard. For your records (Reference Standard), the material is defined by CAS 112809-52-6, formula C17H11N5 and molar mass 285.3 g/mol. It is handled as a solid.

Where it is used

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

Safe handling

Classified under GHS with signal word Warning and hazard statements H373. Read the SDS before first use.

Standard pack sizes are 10 mg, 25 mg, 50 mg and 100 mg, and custom quantities are quoted on request. 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 Letrozole

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

Letrozole 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 Letrozole EP Impurity A
Product nameLetrozole EP Impurity A
Catalogue numberZX-020310
CAS number112809-52-6
IUPAC name4-[(4-cyanophenyl)-(1,2,4-triazol-4-yl)methyl]benzonitrile
Molecular formulaC17H11N5
Molar mass285.3 g/mol
Exact mass285.1014
GradeReference Standard
Physical formSolid
XLogP32.2
H-bond donors / acceptors0 / 4
Topological polar surface area78.3 Ų
HS code38229090
InChIKeyBCTXUGAAOFIJGX-UHFFFAOYSA-N
SMILESC1=CC(=CC=C1C#N)C(C2=CC=C(C=C2)C#N)N3C=NN=C3
PubChem CID14231173
SynonymsLetrozole Related Compound A, Letrozole Impurity A, Letrozole - Impurity A, 4,4'-(1H-1,3,4-Triazol-1-ylmethylene)dibenzonitrile, Benzonitrile, 4,4'-(4H-1,2,4-triazol-4-ylmethylene)bis-, Iso Letrozole, 4,4'-((4H-1,2,4-Triazol-4-yl)methylene)dibenzonitrile, 4,4'-(4H-1,2,4-Triazol-4-ylmethylene)bis benzonitrile, 4,4'-(4H-1,2,4-Triazol-4-ylmethylene)dibenzonitrile, 4,4'-[(4H-1,2,4-Triazol-4-yl)methylene]dibenzonitrile, AMiodarone IMpurity-A, AMiodarone IMpurity-B

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

Safety and GHS hazards

GHS08 Health hazard
Health hazard

Signal word Warning

  • H373May causes damage to organs through prolonged or repeated exposure

Precautionary statements P203, P260, P280, P318, P319, 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 Letrozole 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 Letrozole EP Impurity A

Which CAS number identifies Letrozole EP Impurity A?
Letrozole EP Impurity A is registered under CAS 112809-52-6. You may also see it listed as Letrozole Related Compound A, Letrozole Impurity A, Letrozole - Impurity A. Our catalogue number for this item is ZX-020310.
What are the formula and molar mass of Letrozole EP Impurity A?
For Letrozole EP Impurity A, its formula is C17H11N5 and its molar mass is 285.3 g/mol. The systematic (IUPAC) name is 4-[(4-cyanophenyl)-(1,2,4-triazol-4-yl)methyl]benzonitrile. InChIKey BCTXUGAAOFIJGX-UHFFFAOYSA-N lets you match it in any structure database.
How is Letrozole EP Impurity A used in pharmaceutical QC?
Letrozole EP Impurity A is a characterised reference material linked to Letrozole. 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 Letrozole 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 Letrozole 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 Letrozole EP Impurity A to my country?
Yes. Because Letrozole 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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