El-Aal, Reda M. Abd published the artcileSyntheses and electronic absorption spectra of some new penta- and di-methine cyanine dyes, Application In Synthesis of 606-55-3, the publication is Heteroatom Chemistry (1997), 8(3), 259-266, database is CAplus.
The reaction of a ratio of 1 mol of 5-chloro-3-methyl-1-phenylpyrazolo-4-[2(4)-ethylpyridinium]dimethine cyanine or 5-chloro-4-formyl-3-methyl-1-phenylpyrazole(I) with 2 mol of an appropriate 2(4)-heterocyclic quaternary salt afforded novel pentamethine cyanine dyes. Other reactions of I with heterocyclic nitrogen bases, followed by condensation of the quaternary nitrogen salts with methylheterocyclic iodide salts provided the corresponding unsym. dimethine cyanine dyes. The new pentamethine and dimethine cyanine dyes were identified by elemental analyses and IR and 1H-NMR spectral data. The visible absorption spectra of some selected dyes were investigated in pure and mixed solvents as well as in universal buffer solutions The measure of the variation of absorbance with pH was utilized for the determination of the pKa values, and these data are discussed.
Heteroatom Chemistry published new progress about 606-55-3. 606-55-3 belongs to iodides-buliding-blocks, auxiliary class Quinoline,Salt, name is 1-Ethyl-2-methylquinolin-1-ium iodide, and the molecular formula is C12H14IN, Application In Synthesis of 606-55-3.
Referemce:
https://en.wikipedia.org/wiki/Iodide,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com