Letrozole 5
Oral Letrazole 5mg/ml Oral Anaboilc Steroids Aromatizing Sex Hormone Steroids Femara Formestane
Description:
Alias: FEMARA , CGS-20267 , LETROZOL , LETROZOLE , LetrozoleUsp28 , Letrozole99% , CGS-20267, Femara , LETRAZOLE , letrozolex , Lelrozol
CAS No: 112809-51-5
MF: C17H11N5
MW: 285.3
Purity: 99.2%
Appearance: white powder or light yellow liquid.
Specification:
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 | Conforms Specifications of Enterprise Standard. |
Specifications
Uses:
Letrozole is use for the treatment of local or metastatic breast cancer that is hormone receptor positive or has an unknown receptor status in postmenopausal women.Letrozole has been used for ovarian stimulation by fertility doctors since 2001 because it has fewer side-effects than clomiphene (Clomid) and less chance of multiple gestation. A study presented at the American Society of Reproductive Medicine 2005 Conference suggests that letrozole may increase the risk of birth defects.
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