BP1234

Letrozole

British Pharmacopoeia (BP) Reference Standard

• Synonym(s): 4,4′-(1H-1,2,4-Triazol-1-ylmethylene)bisbenzonitrile
• Empirical Formula (Hill Notation): C₁₇H₁₁N₅
• CAS Number: 112809-51-5
• Molecular Weight: 285.30
• MDL number: MFCD00866241
• UNSPSC Code: 41116107
• NACRES: NA.24

Properties

• grade: pharmaceutical primary standard
• Quality Level: 100
• API family: letrozole
• form: powder
• shelf life: limited shelf life, expiry date on the label
• manufacturer/tradename: BP
• application(s): pharmaceutical; pharmaceutical small molecule
• format: neat
• storage temp.: 2-8°C
• SMILES string: N#CC(C=C1)=CC=C1C(N2C=NC=N2)C3=CC=C(C#N)C=C3
• InChI: 1S/C17H11N5/c18-9-13-1-5-15(6-2-13)17(22-12-20-11-21-22)16-7-3-14(10-19)4-8-16/h1-8,11-12,17H
• InChI key: HPJKCIUCZWXJDR-UHFFFAOYSA-N
• Gene Information: human ... CYP19A1(1588)

Description

General description

This product is provided as delivered and specified by the issuing Pharmacopoeia. All information provided in support of this product, including SDS and any product information leaflets have been developed and issued under the Authority of the issuing Pharmacopoeia. For further information and support please go to the website of the issuing Pharmacopoeia.

Application

Letrozole BP Reference standard, intended for use in laboratory tests only as specifically prescribed in the British Pharmacopoeia.

Also used in monographs such as:

Letrozole Tablets

Biochem/physiol Actions

Letrozole is a non-steroidal aromatase inhibitor.

Letrozole is a third generation nonsteroidal aromatase inhibitor. It is a competitive inhibitor of the aromatase enzyme system and thus inhibits the conversion of androgens to estrogens. Letrozole inhibits the aromatase enzyme by competitively binding to the heme of the cytochrome P450 subunit of the enzyme, resulting in a reduction of estrogen biosynthesis in all tissues.

Packaging

Unit quantity: 100 mg. Subject to change. The product is delivered as supplied by the issuing Pharmacopoeia. For the current unit quantity please visit British Pharmacopoeia

Other Notes

Sales restrictions may apply.

Safety Information

• Pictograms: GHS08
• Signal Word: Warning
• Hazard Statements: H361fd,H373
• Precautionary Statements: P202 - P260 - P280 - P308 + P313 - P405 - P501
• Hazard Classifications: Repr. 2 - STOT RE 2
• Storage Class Code: 11 - Combustible Solids
• WGK: WGK 3
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable