USD $10.00-100.00 / Kilogram
USD $11,000.00-12,000.00 / Metric Ton
USD $11,000.00-12,000.00 / Metric Ton
USD $11,000.00-12,000.00 / Metric Ton
USD $11,000.00-12,000.00 / Metric Ton
USD $10.00-10.00 / Kilogram
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packaging detail: | 1kg/bag;5kg/tin;25kg/drum |
delivery detail: | in 10 days after your final confirmation |
letrozole 112809-51-5
1.cas no:112809-51-5
2.quality: usp32
3.documents: gmp
4.use:antineoplastic agent
5.basic information about letrozole 112809-51-5 :
product name: letrozole
synonyms: 4,4'-(1h-1,2,4-triazol-1-ylmethylene) bis-benzonitrile;femara;cgs-20267;letrozol;letrozole;letrozoleusp28;letrozole99%;cgs-20267, femara
cas no: 112809-51-5
molecular formula: c17h11n5
molecular weight: 285.3
appearance: white to yellowish,crystalline powder
assay: 98.0%-102.0%
usage: a nonsteroidal aromatase inhibitor structurally related to fadrozole. antineoplastic
6.coa of letrozole 112809-51-5 :
items |
specification |
|
appearance |
white to yellowish, crystalline powder |
|
identification |
a.ir spectrum of sample should be identical to that of reference standard; |
|
the retention time of major peak in the chromatogram of the assay preparation should correspond to that in the chromatogram of standard preparation, as obtained in the assay. |
||
showing the white precipitate reaction. |
||
water |
not more than 0.3% |
|
residue on ignition |
not more than 0.1% |
|
heavy metals |
not more than 0.001% |
|
related compounds |
compound a: not more than 0.1% |
|
4,4’,4”-methylidenetrisbenzonitrile: not more than 0.2% |
||
any other impurity: not more than 0.1% |
||
all other impurities: not more than 0.3% |
||
residual sovents |
ethanol: not more than 3000ppm |
|
ethyl acetate: not more than 2000ppm |
||
dmf: not more than 880ppm |
||
microbe limit |
bacteria: not more than 200/g |
|
mold and yeast: not more than 50/g |
||
escherichia coli: should be absent |
||
assay(anhydrous) |
98.0% to 102.0% of cl7h11n5 on dried basis |
|
packaging and storage |
preserve in tight containers at controlled room temperature. |
|
conclusion |
conforms to the usp32. |