Letrozole Description：

MW: 285.30274
EINECS: 675-034-8
Melting point  181-183°C
Boiling point  563.5±60.0 °C(Predicted)
density  1.21±0.1 g/cm3(Predicted)
storage temp.  -20°C Freezer
solubility  DMSO: >50mg/mL
pka 1.52±0.11(Predicted)

Letrozole is part of a new generation of highly selective aromatase inhibitors and is an artificially synthesized benzotriazole derivative.

Letrozole inhibits aromatase to lower estrogen levels, thus preventing estrogen from stimulating tumor growth. Its in vivo activity is 150-250 times stronger than that of first generation aromatase inhibitor Amarante.

As it is highly selective, it will not impact glucocorticoid, mineralocorticoid and thyroid functions; even at high dosages, it will not have any inhibiting effects on adrenal corticosteroid secretion, giving it a high treatment index.

Letrozole has no latent toxicity towards any bodily systems and target organs, has no mutagenicity and carcinogenic effects, has minimal toxic side effects, is well-tolerated,

and has stronger anticancer effects than other aromatase inhibitors and antiestrogen drugs. Letrozole is suitable for advanced breast cancer postmenopausal patients

who have not responded to estrogen-suppressing treatment and for early breast cancer treatment. It is used to treat postmenopausal patients

with advanced breast cancer and serves as a second-line treatment to follow unsuccessful antiestrogen treatment.

Compared to the current standard Tamoxifen treatment, Letrozole can better prevent the risk of breast cancer recurrence.

Our advantage:

Rich experience.

We have specialized in this field for 11 years. Our steroids and hormones have been exported to overseas, like Europe, Africa, Asia, America and other countries.
 And we have got very good feedback from our customers, and established long friendly relations of cooperation.

High quality products with the best price

1.All powders are factory directly supplying and have much in stock.

2.Before each powder send out, it all will be tested again by our technician, if the quality good, then it can be sent out to customers.

Best pre-sell and after-sell service.

1.Once the package send out, tracking number and packing picture should email you later

2.For raw powder buyer, we also can help you cook steroid powder into injection and supply you all the things to make ready use injection, such as 10ml vials,
0.22um-0.45um whatman filter,crimper machine and filter pump

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FAQ:
Q1: Do you offer free sample
A: Of course, we will offer free sample if you pay shipping fees.

Q2: How to solve the quality problem
A: We supply high quality products and quality issue near to zero. If it happens caused by occasional case, we will reship again or compensate customer loss, but customer need show us the evidence of problems or test report.

Q3: Whether transportation is safe and whether to reship if seized
A: Yes, we offer almost 100% Shipping line with safe delivery. If seized unfortunately, we will ship and I am sure no custom issue.

Q4: ETA
A: Pack sent out in 2-3 days and offer tracking numbers after payment. ETA not the same decide by destination country. Please contact us for details (always 10-15 days).

Q5: Do you have any discount
A: The price is negotiable. Plz shoot us your order content, we will quote a fair price.

Q6: What is your minimum order
A: Usually MOQ is 100g. But depends on the items and your requirements, we also can support small quantity, such as 20g and 50g.

Q7: How to order
A: E-mail or message us that includes your order like format below:
product A   100g
product B   10vials
delivery country: 
Our sales will quote a total cost includes shipping fees and each item fees in 12 hours regularly. 
Our will satisfy your purchase and supply professional guide.