Letrozole EP Impurity A

Name: Letrozole EP Impurity A
Brand: Vaqora Chemicals
SKU: VQ-021255

About Letrozole EP Impurity A

Listed under CAS 112809-52-6, Letrozole EP Impurity A is a pharmacopeial impurity of Letrozole available from Vaqora Chemicals. The compound has the formula C17H11N5, corresponding to a molecular weight of 285.3 g/mol. Its systematic (IUPAC) name is 4-[(4-cyanophenyl)-(1,2,4-triazol-4-yl)methyl]benzonitrile. Alternative names: Letrozole Related Compound A and Letrozole Impurity A.

The product is provided as a solid. Keep the vial tightly closed, protected from light and humidity, at the temperature stated on the Certificate of Analysis. The GHS classification uses the signal word “Warning”, so appropriate gloves, eye protection and ventilation are recommended.

This Letrozole impurity supports analytical method development and validation (AMV), batch release testing and the impurity sections of ANDA and DMF filings. Buyers come mainly from pharmaceutical manufacturing and academic and industrial research.

Available in 10 mg, 25 mg, 50 mg and 100 mg packs, Letrozole EP Impurity A is dispatched with a Certificate of Analysis (COA) to destinations worldwide.

Typical applications

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

Industries

Related to Letrozole

View every impurity, metabolite and intermediate we list for Letrozole.

Letrozole impurities

Grade guides

Specifications & identifiers

Chemical identifiers
Product name	Letrozole EP Impurity A
Catalogue No.	VQ-021255
CAS Number	112809-52-6
IUPAC name	4-[(4-cyanophenyl)-(1,2,4-triazol-4-yl)methyl]benzonitrile
Molecular formula	C₁₇H₁₁N₅
Molecular weight	285.3 g/mol
Exact mass	285.1014
Grade	Reference Standard
HSN code	38229090
InChIKey	BCTXUGAAOFIJGX-UHFFFAOYSA-N
SMILES	C1=CC(=CC=C1C#N)C(C2=CC=C(C=C2)C#N)N3C=NN=C3
PubChem CID	14231173

Physical properties
Physical form	Solid
LogP (XLogP3)	2.2
H-bond donors / acceptors	0 / 4
TPSA	78.3 Å²
Synonyms	Letrozole 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

Safety & hazard information (GHS)

Health hazard

Signal word: Warning

Hazard statements

H373May causes damage to organs through prolonged or repeated exposure

Precautionary statements: P203, P260, P280, P318, P319, P405, P501

Classification is indicative (aggregated GHS notifications) and may vary by grade and concentration. Always refer to the SDS supplied with your lot.

Documents

Safety Data Sheet (SDS)16-section GHS · on request Certificate of AnalysisTypical / batch COA · on request Specification sheetTDS / MOA · on request

Frequently asked questions

What is the CAS number of Letrozole EP Impurity A?

The CAS Registry Number of Letrozole EP Impurity A is 112809-52-6. It is also known as Letrozole Related Compound A, Letrozole Impurity A, Letrozole - Impurity A.

What is the molecular formula and molecular weight of Letrozole EP Impurity A?

Letrozole EP Impurity A has the molecular formula C17H11N5 and a molecular weight of 285.3 g/mol. Its IUPAC name is 4-[(4-cyanophenyl)-(1,2,4-triazol-4-yl)methyl]benzonitrile.

What is Letrozole EP Impurity A used for?

Letrozole EP Impurity A is supplied as a characterised reference material related to Letrozole. It is used for analytical method development and validation (AMV), impurity profiling, stability studies and quality control, and in ANDA/DMF regulatory filings.

Which grade and pack sizes of Letrozole EP Impurity A can I order?

We supply Letrozole EP Impurity A in Reference Standard grade, in 10 mg, 25 mg, 50 mg, 100 mg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Letrozole EP Impurity A?

Yes. Every lot of Letrozole EP Impurity A is shipped with a batch-specific Certificate of Analysis, and a 16-section GHS Safety Data Sheet is provided with the quotation and the shipment.

Can Letrozole EP Impurity A be shipped internationally?

Yes. Letrozole EP Impurity A is classified as hazardous, so it is packed in UN-approved packaging and shipped as dangerous goods under IATA/IMDG rules. We export worldwide on EXW, FOB, CIF and DAP terms.