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ChemicalBook >  Product Catalog >  Analytical Chemistry >  Standard >  Pharmaceutical Impurity Reference Standards >  4,4'-(4H-1,2,4-TRIAZOL-4-YLMETHYLENE)BIS BENZONITRILE

4,4'-(4H-1,2,4-TRIAZOL-4-YLMETHYLENE)BIS BENZONITRILE

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4,4'-(4H-1,2,4-TRIAZOL-4-YLMETHYLENE)BIS BENZONITRILE Basic information

Product Name:
4,4'-(4H-1,2,4-TRIAZOL-4-YLMETHYLENE)BIS BENZONITRILE
Synonyms:
  • 4,4'-(4H-1,2,4-TRIAZOL-4-YLMETHYLENE)BIS BENZONITRILE
  • Iso Letrozole
  • Letrozole USP iMpurities
  • AMiodarone IMpurity-A
  • AMiodarone IMpurity-B
  • 4,4'-(1H-1,3,4-triazol-1-ylMethylene)dibenzonitrile
  • Letrozole Related CoMpound A
  • 4,4'-(4H-1,3,4-TRIAZOL-4-YLMETHYLENE)BIS
CAS:
112809-52-6
MF:
C17H11N5
MW:
285.3
Mol File:
112809-52-6.mol
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4,4'-(4H-1,2,4-TRIAZOL-4-YLMETHYLENE)BIS BENZONITRILE Chemical Properties

Melting point:
239-243 °C
Boiling point:
563.5±60.0 °C(Predicted)
Density 
1.21±0.1 g/cm3(Predicted)
storage temp. 
2-8°C
solubility 
Chloroform (Slightly, Heated), Methanol (Slightly)
form 
Solid
pka
2.48±0.10(Predicted)
color 
Off-White to Pale Yellow
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Safety Information

HS Code 
2933998350
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4,4'-(4H-1,2,4-TRIAZOL-4-YLMETHYLENE)BIS BENZONITRILE Usage And Synthesis

Uses

Isoletrozole (Letrozole EP Impurity A) is an impurity of Letrozole (L330100). Letrozole impurity A as per USP.

Uses

Isoletrozole is an impurity of Letrozole (L330100). Letrozole impurity A as per USP.

4,4'-(4H-1,2,4-TRIAZOL-4-YLMETHYLENE)BIS BENZONITRILESupplier

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