Anti Breast Cancer Femara Letrozole for Tumor

Basic informations:
CAS NO: 112809-51-5
​Content: 99% min
Molecular Formula: C17H11N5
Molecular Weight: 285.31
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Product Details

Anti Breast Cancer Femara Letrozole for tumor Anti Estrogen Steroids 633-35-2 Prohormones Atd Muscle Building Steorids

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Letrozole Contact Mitchell: Whatsapp +8618124076819 Skype: hk@chembj.com

Basic informations:

CAS NO: 112809-51-5
Content: 99% min  
Molecular Formula: C17H11N5
Molecular Weight: 285.31
Appearance white
or off-white powder
Melting point 181-183 ° C


What is Letrozole?

Letrozole (trade name Femara) is an oral non-steroidal aromatase inhibitor for the treatment of hormonally-responsive breast cancer after surgery. 


Functions of Letrozole:

1. Treatment of postmenopausal women with advanced breast cancer (estrogen receptor, progesterone receptor positive or unknown receptor status), used for anti-estrogen therapy after the failure of second-line treatment;

2. For locally advanced or spread after the first-line treatment of postmenopausal breast cancer (foreign data);

3. For the received standard adjuvant tamoxifen therapy in postmenopausal breast cancer after five years of adjuvant therapy in patients with extension (foreign data);

4. Postoperative adjuvant therapy for hormone-positive early breast cancer patients.


Distinctions Between Letrozole and Anastrozole:
Letrozole tablets: suitable for advanced breast cancer after menopause, most used in the treatment of anti-estrogen treatment failure after second-line therapy.
Anastrozole: an effective selective inhibitor for three azole aromatase, it inhibits the aromatase relied by cytochrome P-450, further blocks estrogen biosynthesis, which is the main factor to stimulate breast cancer cell growth. The 50% inhibitory concentration (IC50) value of human placenta aromatase is 15 nmol/L. 


Letrozole COA:

Tests

Specifications

Results

Appearance

White or off-white crystaline powder

White
Crystalline powder

Solubility

Soluble in Chloroform;
Soluble in ethanol when heated

Conform

ldentification

(1)Maximum absorption in wavelength of 240 nm
Minimum absorption in wavelength of 215 nm

Conform
Conform

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

In accordance with the dominant peak of contrast

Melting points

182°C-184°C

182°C

Related substances

≤0.5%

0.3%

Single impurity

≤0.3%

0.2%

Loss on drying

≤1.0%

0.8%

[Assay]C17H11N5
(On anhydrous basis)

≥98.0%

99.9%

Conclusion

Conforms Specifications of Enterprise Standard.

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Good Customer's feedback :
I am very satisfied with your powders so far! They seem to be working very well for me. I will be interested in ordering some other products from you maybe in a couple months! I need to use up what I have first haha!Please keep me in your satisfied customer category and please wait to hear from me in the near future!Thanks again for your great business and A+ service! I'll contact you as soon as I am ready to place another order!
 --------alex--Sweden
 
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 --------john--UK
 
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 --------steve--Germany


Perfect! Very good product! I love it!
 --------Mahamat--France


I have received my products, you packing is do discreet and perfect, it really amazed me. I will order more from you as soon as possible. Thanks a lot.
 --------Robet--Australia


I have cooperated with you for many times, your product quality is so great, that is why I still buy the products from you. Thank you
 --------Richard---American


Some Question :
Question 1, How do you pack the order ?
Discreet package, the packing suits you best would be choosen to cross customs safely

Question 2, What is your shipping method ?
Shipping by express (FedEx,UPS,DHL,EMS,HKEMS,TNT), and cheapest by airmail

Question 3, if my order seized by custom, what do you do ?
Resending police if the tracking number do not update online or it sezied by custom

Question 4, What is your payment accept ?
Safe and fast payment: Western Union, Money Gram, T/T, Bitcoin

Question 5, Will you supply tracking number ?
Yes, we supply tracking number for following. In general, once we supply the tracking number to you ,you can track the parcel information within 1-2 business days

Question 6, How many days will it take to my country after I do the payment ?
In general, fastest with 3-5 business, slowest 5-7 business days


Hot selling market :

United State(USA), United Kingdom(UK), Australia, Canada, Spain, France, Germany, Russia, Brasil(Brazil), Ukraine, South Africa , Norway, Poland, Netherlands(Holland), Slovakia, Georgia, New Zealand, Sweden etc.


If You Have Any Question Plz Contact Me Without Hesitate

Mitchell Lu

Email

hk@chembj.com

Whatspp

+8618124076819

Steroids、Peptide、Sex Enhancers、pharmaceutical raw materials、SARMS、Fat Loss, etc.


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