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Home>Products>Anti Estrogen Steroids>112809-51-5 Anti Estrogen Steroids Cancer Treatment Letrozole / Femara
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112809-51-5 Anti Estrogen Steroids Cancer Treatment Letrozole / Femara
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Hongkong Pengfei Pharmaceutical Technology Co.,Ltd2020-07-10 09:46:19
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Product Details
| Name: | Letrozole | Other name: | Femara | Usage: | treating breast cancer,bodybuilding |
| Assay: | 99% | standard: | usp,bp,ep |
Product Description
112809-51-5 Anti Estrogen Steroids Cancer Treatment Letrozole / Femara
Basic information
Letrozole
Synonyms: Femara; Letrozol
No.: 112809-51-5
M.F.: C17H11N5
M.W.: 285.3
Assay: 99%
Melting Point: 181-183℃
Appearance: White or white crystalline powder
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℃-184℃ | 182℃ |
| 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% | 99.2% |
| Conclusion | The specifications conform with enterprise standard. | |
Usage:
Letrozole is a hormonal therapy drug. It is used to treat breast cancer in women who have been through the menopause. It’s best to read this information with our general information about breast cancer or secondary breast cancer.
How letrozole worksBack to top
We also have information about breast cancer in men which explains the hormonal therapies used in men.
Hormones are substances produced naturally in the body. They act as chemical messengers and help control the activity of cells and organs. Hormonal therapies interfere with the way hormones are made or how they work in the body.
Many breast cancers rely on the hormone oestrogen to grow. This type of breast cancer is called oestrogen receptor-positive (ER positive) breast cancer.
After the menopause, oestrogen is no longer made in the ovaries. Instead it’s made in the fatty tissues of the body. This happens when an enzyme called aromatase changes other hormones into oestrogen. Letrozole is a drug called an aromatase inhibitor. It blocks this process and reduces the amount of oestrogen in the body.
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