Raw Material Breast Cancer Cure Drug CAS 112809-51-5 Letrozole

Basic Information
Place of Origin: China
Brand Name: Senwayer Brand
Certification: ISO, 9001, USP
Model Number: 112809-51-5
Minimum Order Quantity: 10grams
Price: Discount is possible if your order is big enough
Packaging Details: 10g, 20g, 50g , 100g, 500g. 1kg, 10kg
Delivery Time: within 2 working days
Payment Terms: T/T in advance, Money Gram, Western Union, Bank Transfer.
Supply Ability: 1000kg/month
Detail Information
NR CAS: 112809-51-5 NR Alias: Femara, Letrozole
NR Apparence: Almost White Crystalline Powder NR Purity: 99%
High Light:

anti cancer drugs


breast cancer drugs

Product Description

Raw Material Breast Cancer Cure Drug CAS 112809-51-5 Letrozole


Quick detail

Letrozole Alias Femara, Letrozole, TROZET,Femara;Letrozol,Letrozole,Hormone,4,4'-(1H-1,2,4-TRIAZOL-1-YLMETHYLENE) BIS-BENZONITRILE;CGS-20267;LETROZOL;LetrozoleUsp28;Letrozole99%;CGS-20267
Letrozole CAS Number:
Letrozole Purity:
Letrozole MF:
Letrozole MW: 285.3
Letrozole Character:
White crystalline powder.
Other drugs in same class: Anastrozole,Letrozole,Tamoxifen citrate,Exemestane
Letrozole Usage:
Letrozole is a powerful Aromatase Inhibitor that was developed to fight breast cancer. For athletes and bodybuilders, it is a drug used to combat the estrogenic side effects of anabolic steroids water-retention, acne and gynocomastia. It will also raise testosterone levels because of the lowered estrogen in the body. Side effects from Letrozole include a lowered sex drive and continuous use can lead to lowered lipid function and an impaired immune system.


Letrozole Usage:

Letrozole is approved to be used alone or with other drugs to treat:

  • Breast cancer in postmenopausal women who have any of the following types of breast cancer--
  • Early-stage, hormone receptor positive (HR+) breast cancer in women who have already received other treatment.
  • Early-stage breast cancer that has been treated with tamoxifen citrate for at least five years.
  • Breast cancer that is locally advanced or has metastasized (spread to other parts of the body), is HER2 positive (HER2+) and HR+.
  • Breast cancer that is locally advanced or has metastasized and it is not known whether the cancer is HR+ or hormone receptor negative (HR-).
  • Advanced breast cancer that has gotten worse after antiestrogen therapy.

Letrozole is also being studied in the treatment of other types of cancer.



More About Letrozole

Definition from the NCI Drug Dictionary - Detailed scientific definition and other names for this drug.


MedlinePlus Information on Letrozole - A lay language summary of important information about this drug that may include the following:

  • warnings about this drug,
  • what this drug is used for and how it is used,
  • what you should tell your doctor before using this drug,
  • what you should know about this drug before using it,
  • other drugs that may interact with this drug, and possible side effects.

Drugs are often studied to find out if they can help treat or prevent conditions other than the ones they are approved for. This patient information sheet applies only to approved uses of the drug. However, much of the information may also apply to unapproved uses that are being studied.


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Raw Material Breast Cancer Cure Drug CAS 112809-51-5 Letrozole 0



Before taking letrozole, tell your doctor or pharmacist if you are allergic to it; or to anastrozole; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.

Before using this medication, tell your doctor or pharmacist your medical history, especially of: high blood fats (cholesterol), bone problems (such as osteopenia, osteoporosis), stroke or blood clots, heart disease (such as chest pain, heart attack, heart failure), high blood pressure, kidney problems, liver problems.

This drug may make you dizzy and tired, and may rarely cause blurred vision. Do not drive, use machinery, or do any activity that requires alertness or clear vision until you are sure you can perform such activities safely. Limit alcoholic beverages...



Tests Specifications Results
Appearance White or off-white crystaline powder White Crystalline powder
Solubility Soluble in Chloroform;
Soluble in ethanol when heated
ldentification (1)Maximum absorption in wavelength of 240 nm
Minimum absorption in wavelength of 215 nm

(2)Infrared spectrum should be in accordance the dominant peak of contrast

In accordance with the dominant peak of contrast

Melting points 182ºC-184ºC 182ºC
Related substances ≤0.5% 0.3%
Single impurity ≤0.3% 0.2%
Loss on drying ≤1.0% 0.8%
(On anhydrous basis)
≥98.0% 99.2%
Conclusion Conforms Specifications of Enterprise Standard.


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