Alias: Femara
Purity: 99%min
CAS Registry Number: 112809-51-5
Molecular formula: C17H11N5
Molecular weight: 285.3
Grade: Pharmaceutical Grade
Usage: pharmaceutical material
Femara, sold under the brand name Femara, is a prescription drug used to treat breast cancer in its advanced stages, and in women who have finished menopause. Doctors may use Femara off-label in fertility treatments to help encourage egg release (ovulation) in women. Femara belongs to a class of cancer drugs known as aromatase inhibitors, which work by preventing the body from converting a hormone called androgen into estrogen.
Letrozole is a type II (non-steroidal) third generation aromatase inhibitor. Clinically it is used to treat postmenopausal women with either estrogen receptor positive or estrogen receptor unknown breast cancer.
For pre-contest bodybuilders, Letrozole is almost a necessity to eliminate water retention and achieve the ripped look necessary to compete in today’s bodybuilding world.
| TEST ITEMS |
SPECIFICATION
|
RESULTS
|
|
Description
|
White Crystalline Powder
|
White Powder
|
|
Identification
|
Positive
|
Positive
|
|
Assay(by HPLC)
|
98.0~102.0%
|
99.58%
|
|
Absorbance(E1cm)
|
465~495
|
486.5
|
|
Melting Point
|
191~195ºC
|
192.5~195.0ºC
|
|
Loss On Drying
|
0.5%max
|
0.22%
|
|
Specific Rotation
|
+288º~ +298º
|
+295.2ºC
|
|
Residue On Ignition
|
0.1%max
|
0.02%
|
|
Related Substances
|
Total:1.5%max
|
<1.2%
|
|
|
Single:0.5%max
|
<0.6%
|
|
Residue Solvents
|
0.2%max
|
0.1%
|
|
Heavy Metals
|
20PPm max
|
<10PPm
|
