Anti Estrogen Anabolic Legal Steroids Letrozole/Femara Raw Steroid Powder For Breast Cancer CasNO.112809-51-5

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Keywords:Letrozole / Femara
Appearance:White/Almost White Powder
CAS: 112809-51-5
Shipping Method: FEDEX, UPS, DHL, TNT, HK EMS
MF: C17H11N5
Export Market:USA, UK, France, Brazil…
High Light:anabolic steroid powder, methenolone enanthate

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Letrozole(Femara) Detailed Product Profile

  • CAS No: 112809-51-5Molecular formula: C17H11N5

    Molecular weight: 285.3

    Appearance: White power

    Assay: 99%

    Delivery time:

    Minimum order: 100g

    Supply ability: 5000kg/month

    Quality standard: USP32

    Payment: T/T, Western Union and Money Gram

    Delivery: Within 24hours After Your Payment

    Usage: antineoplastic drug,Letrozole is a new generation of selective aromatase inhibitors, for the artificial synthesis of benzyl triazole derivative, inhibit aromatase, decreased estrogen levels, thereby eliminating stimulation of estrogen on tumor growth.

  • Letrozole(Femara) the report of product quality analysis
  • Tests Specifications Results
    Appearance White or off-white crystaline powder White 

    Crystalline powder



    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 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%

    (On anhydrous basis)

    ≥98.0% 99.2%
    Conclusion Conforms Specifications of USP35
Letrozole (1)
Letrozole (3)
Letrozole (4)

Letrozole(Femara) Description

There are two entirely different stories to be found on the aromatase inhibitor letrozole.
In medical studies measuring blood estradiol and testosterone levels of hundreds of individuals, letrozole is a very consistent-performing drug with almost no unusual behavior. The only unusual behavior to be found in scientific literature is in a very early publication by the pharmaceutical manufacturer which made it appear unbelievably potent, but left out many details. All other studies have shown rather ordinary and consistent potency.
My own findings over more than 10 years have matched up with these results.
The other story will be that even trace doses of letrozole will “obliterate” estrogen and that it’s very tricky to use for this reason.
Obviously, if that’s your personal experience using a given letrozole product, go by your experience. If however you are new to letrozole or have used it successfully before, then I recommend that you consider it no greater in dosing difficulty than any other aromatase inhibitor (AI), as this is my experience with very many individuals.
How much letrozole to use? As with all AI’s, there’s significant personal variation, where a significant number of users need only about half as much as most, and a few need even less. In all cases, dosing must be individually judged based on observed side effects, and preferably based on blood testing as well. But as a general guideline, I recommend about 0.36 mg/day as a base amount for an anabolic steroid cycle with a modest amount of aromatizable steroids, such as 200-300 mg/week testosterone. At a higher dose such as 750 mg/week, this amount will usually be doubled. Generally no more than 1 mg/day should be taken unless blood testing shows abnormally high estradiol even at that level, but that’s rarely the case.
Overdosing will result in low estradiol levels, which may result in adverse side effects of loss of libido, depression, joint pain, or flat-appearing musculature. If underdosed while using aromatizable steroids such as testosterone or Dianabol, abnormally high estradiol also can cause loss of libido or depression, can cause water retention, and can cause or aggravate gynecomastia.
Where experiencing depression or loss of libido as the only observed side effects and unsure if the problem is from underdosing or overdosing, blood testing is the best way to resolve the question. Simply changing dose and observing the result can be another way.
When wishing to reduce dosing of letrozole, it’s important to account for the drug’s two-day half life. Because of buildup in the body, if you simply reduce dose the result won’t be fully seen for more than a week! Yet you have a problem that should be corrected promptly.
Instead, allow levels to drop during a short break. If for example you wish to cut dosing in half, take two days off entirely, and then begin your reduced dose. Or, if you wish to reduce dose by 25%, take one day off and then start the new dosing.
When beginning letrozole use, its half life also should be accounted for. In general, when using letrozole on an ongoing basis, when taking a dose your body will have in it not only the dose you just took, but two days’ worth of doses built up in it as well. If on the first day of use you take only one dose, you won’t have as much in your system as you need. Instead, take 3 doses’ worth on the first day, and after that use your regular daily dosing. This will promptly get blood levels where they need to be. If you do not do this, then it will take about two weeks for blood levels to build up fully.

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