Gimenez Plaza, J. published the artcile2-Pyridylaldehyde 2-pyridylhydrazone as an analytical reagent. VI. Spectrophotometric determination of iron(II), Formula: C11H10N4, the publication is Boletin de la Sociedad Quimica del Peru (1980), 46(3), 278-8, database is CAplus.
Fe(II) 3-10 ppm in aqueous solution was determined spectrophotometrically by reaction with 10 mL 2 × 10-3M 2-pyridylaldehyde 2-pyridylhydrazone in the presence of 5mL pH 9 NH4Cl-NH4OH buffer. The order of reagent addition is not important. The maximum absorption of the violet solution is at 550 nm. The complex is stable for at least 3 h. Stoichiometry of the complex is 2:1 (reagent/cation). Beer’s law is obeyed for 2-16 ppm Fe(II). Zr(IV) and Be(II) >50 ppm and Sn(II), Co(II), and Ce(II) >2 ppm interfere.
Boletin de la Sociedad Quimica del Peru published new progress about 2215-33-0. 2215-33-0 belongs to pyridine-derivatives, auxiliary class Pyridine,Amine, name is 2-((2-(Pyridin-2-yl)hydrazono)methyl)pyridine, and the molecular formula is C11H10N4, Formula: C11H10N4.
Referemce:
https://en.wikipedia.org/wiki/Pyridine,
Pyridine | C5H5N – PubChem