Letrozole EP impurity B

SL-6486

Letrozole EP impurity B, >98%

CAS No. : [113402-31-6]

MDL No. : MFCD08460198

IUPAC Name : 4-[Bis(4-cyanophenyl)methyl]benzonitrile; 4,4',4''-Methanetriyltribenzonitrile

Price And Availability
Pack Size	Price in USD	Add To Shopping Cart	Availability	Shipping Status
250MG	Request A Quote		Back Order	Estimated to ship on 04 October 2026
1G	Request A Quote		Back Order	Estimated to ship on 04 October 2026
5G	Request A Quote		Back Order	Estimated to ship on 04 October 2026

Applications : This is an impurity of Letrozole (Letrozole EP impurity B), which is a third generation inhibitor of aromatase, used in the treatment of hormonally-responsive breast cancer after surgery.

References : Haynes B. P. et al.: J. Steroid Biochem Mol Biol., 87(1), 35-45, 2003; Bhatnagar A. S. et al.: J. Steroid Biochem Mol Biol., 37(6), 1021-1027, 1990; Mitropoulou T. N. et al.: Int. J. Cancer., 104(2), 155-160, 2003; Dellapasqua S. et al.: Expert Opin Drug Metab Toxicol., 6(2), 251-259, 2010; Lee K. et al.: Int J Cancer., 62(3), 297-302, 1995; Steele R. E. et al.: Steroids, 50(1-3), 147-161, 1987.

Storage : Keep container tightly closed under nitrogen or argon and refrigerate for long-term shelf life.

Caution : In case of contact with skin or eyes, rinse immediately with plenty of water and seek medical advice. Wear suitable protective clothing and gloves.