USD $9.00-99.00 / Kilogram
USD $9.00-99.00 / Kilogram
USD $9.00-99.00 / Kilogram
USD $9.00-99.00 / Kilogram
USD $9.00-99.00 / Kilogram
USD $9.00-99.00 / Kilogram
USD $9.00-99.00 / Kilogram
USD $9.00-99.00 / Kilogram
USD $9.00-99.00 / Kilogram
certificate of analysis
product name: |
letrozole |
mfg date: |
2013-06-07 |
batch no: |
20130607 |
exp. date: |
2015-06-06 |
report date: |
2013-06-15 |
quantity: |
200kg |
item |
standard |
result |
characters |
white or off-white crystaline powder |
off-white crystalline powder |
solubility |
practically insoluble in water,freely soluble in methylene chloride,sparingly soluble in methanol |
complies |
identification |
(1) maximum absorption in wavelength of 240 nm minimum absorption in wavelength of 215 nm |
complies |
(2) infrared spectrum should be in accordance the dominant peak of contrast. |
complies |
|
melting point |
181℃~185℃ |
182.2℃-183.6℃ |
related substances |
impurity a ≤0.3% |
not detected |
impurity b ≤0.2% |
not detected |
|
single impurity ≤0.1% |
0.01% |
|
other total impurity≤0.3% |
0.05% |
|
residue on ignition |
≤0.1% |
0.04% |
water |
≤0.3% |
0.06% |
heavy metals |
≤10ppm |
complies |
assay |
98.0%-102.0% |
99.86% |
conclusion |
confirms |
identification | ||
name | letrozole | |
synonyms | 4,4'-(1h-1,2,4-triazol-1-ylmethylene)bisbenzonitrile | |
molecular structure | ||
molecular formula | c17h11n5 | |
molecular weight | 285.31 | |
cas registry number | 112809-51-5 | |
properties | ||
melting point | 181-183 ºc | |
safety data | ||
msds | available |