Letrozole

Name: Letrozole
Brand: Zemixal
SKU: ZX-004218

IP/BP/USPAvailable on request

Letrozole (CAS 112809-51-5) supplier Zemixal: C17H11N5, COA and SDS with every lot, worldwide shipping. Catalogue no. ZX-004218.

Pack sizes

CAS number112809-51-5

FormulaC₁₇H₁₁N₅

Molar mass285.3 g/mol

Physical formPowder

HS code2933

Purity99%

InChIKeyHPJKCIUCZWXJDR-UHFFFAOYSA-N

IUPAC name4-[(4-cyanophenyl)-(1,2,4-triazol-1-yl)methyl]benzonitrile

About Letrozole

Letrozole sits in our oncology APIs section and ships worldwide from stock or short lead time. For your records (IP/BP/USP), the material is defined by CAS 112809-51-5, formula C17H11N5 and molar mass 285.3 g/mol. It is described as white to off-white powder.

Common uses in the lab and plant

Polymer & resin production
Pharmaceutical formulation

Storage and safety notes

Classified under GHS with signal word Danger and hazard statements H315, H319, H351 and H360. Read the SDS before first use.

Available as 1 kg, 5 kg and 25 kg. Larger or split packs can be arranged. Each lot travels with a batch certificate of analysis and a 16-section SDS. Add it to your quote list and our team replies with price, lead time and shipping options within one business day.

Reference standards for Letrozole

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

Letrozole standards

Typical uses

Polymer & resin production
Pharmaceutical formulation

Applications

Pharmaceutical Manufacturing and QC

Grade guides

IP Grade (Indian Pharmacopoeia)BP Grade (British Pharmacopoeia)USP Grade (United States Pharmacopeia)

Specifications and identifiers

Specifications of Letrozole
Product name	Letrozole
Catalogue number	ZX-004218
CAS number	112809-51-5
IUPAC name	4-[(4-cyanophenyl)-(1,2,4-triazol-1-yl)methyl]benzonitrile
Molecular formula	C₁₇H₁₁N₅
Molar mass	285.3 g/mol
Exact mass	285.1014
Grade	IP/BP/USP
Purity / assay	99%
Physical form	Powder
Appearance	White to off-white powder
XLogP3	2.7
H-bond donors / acceptors	0 / 4
Topological polar surface area	78.3 Å²
HS code	2933
InChIKey	HPJKCIUCZWXJDR-UHFFFAOYSA-N
SMILES	C1=CC(=CC=C1C#N)C(C2=CC=C(C=C2)C#N)N3C=NC=N3
PubChem CID	3902
Synonyms	Letrozol, Benzonitrile, 4,4'-(1H-1,2,4-triazol-1-ylmethylene)bis-, 4,4'-(1H-1,2,4-Triazol-1-ylmethylene)dibenzonitrile, 4-((4-cyanophenyl)-(1,2,4-triazol-1-yl)methyl)benzonitrile, 4-((4-cyanophenyl)(1H-1,2,4-triazol-1-yl)methyl)benzonitrile, Letrozole Tablets, 4,4'-(1H-1,2,4-triazol-1-yl-methylene)-bis(benzonitrile), 4,4'-(1H-1,2,4triazol-1-ylmethylene)dibenzonitrile, 4,4'-((1h-1,2,4-triazol-1-yl)methylene)dibenzonitrile, 4,4'-(1h-1,2,4-triazol-1-ylmethylene)bisbenzonitrile, 4,4'-(1H-1,2,4-triazol-1-ylmethanediyl)dibenzonitrile, 1-[bis(4-cyanophenyl)methyl]-1,2,4-triazole

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

Safety and GHS hazards

Irritant or harmful

Health hazard

Signal word Danger

H315Causes skin irritation
H319Causes serious eye irritation
H351Suspected of causing cancer
H360May damage fertility or the unborn child
H373May causes damage to organs through prolonged or repeated exposure

Precautionary statements P203, P260, P264, P264 + P265, P280, P302 + P352, P305 + P351 + P338, P318, P319, P321, P332 + P317, P337 + P317, P362 + P364, 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
1 kg	Quoted on request
5 kg	Quoted on request
25 kg	Quoted 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

Which CAS number identifies Letrozole?

Letrozole is registered under CAS 112809-51-5. You may also see it listed as Letrozol, Benzonitrile, 4,4'-(1H-1,2,4-triazol-1-ylmethylene)bis-, 4,4'-(1H-1,2,4-Triazol-1-ylmethylene)dibenzonitrile. Our catalogue number for this item is ZX-004218.

What are the formula and molar mass of Letrozole?

For Letrozole, 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-1-yl)methyl]benzonitrile. InChIKey HPJKCIUCZWXJDR-UHFFFAOYSA-N lets you match it in any structure database.

How is Letrozole used in pharmaceutical QC?

Letrozole 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?

This listing is IP/BP/USP grade with 99% purity. Standard packs are 1 kg, 5 kg, 25 kg. Larger quantities and custom packing can be quoted on request.

Which documents come with Letrozole?

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 to my country?

Yes. Because Letrozole 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.

More Letrozole standards

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