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Key Documents

Safety Information

BP1234

Letrozole

British Pharmacopoeia (BP) Reference Standard

Synonym(s):

4,4′-(1H-1,2,4-Triazol-1-ylmethylene)bisbenzonitrile

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About This Item

Empirical Formula (Hill Notation):
C17H11N5
CAS Number:
Molecular Weight:
285.30
MDL number:
UNSPSC Code:
41116107
NACRES:
NA.24

grade

pharmaceutical primary standard

Quality Level

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)

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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 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.

    Pictograms

    Health hazard

    Signal Word

    Warning

    Hazard Statements

    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


    Regulatory Listings

    Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.

    PDSCL

    Deleterious substance

    JAN Code

    BP1234:


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    Lot/Batch Number

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