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1,1’-Diethyl-2,2’-carbocyanine iodide (CAS 605-91-4)

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Synonym:Quinaldine blue
Application:A cationic cyanine fluorescent dye & pH indicator
CAS Number:605-91-4
Molecular Weight:480.38
Molecular Formula:C25H25IN2
Refer to Certificate of Analysis for lot specific data (including water content).
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 Ordering Information
Product NameCatalog #UnitPriceQtyAddFavorites
1,1′-Diethyl-2,2′-carbocyanine iodide sc-206215 250 mg $43
1,1′-Diethyl-2,2′-carbocyanine iodide sc-206215A 1 g $138
This is classified as a Dangerous Good for transport and may be subject to additional shipping charges.
1,1’-Diethyl-2,2’-carbocyanine iodide, also known as Pinacyanol iodide, is a fluorescent cationic cyanine dye. The molecule contains two nitrogen atoms interacting through a conjugated pi system with one nitrogen bearing a formal positive charge, setting up a "push-pull" alkene system that poises the dye for strong interaction with light - a property of the cyanines that has been exploited for use in laser spectroscopy, formulation of photographic emulsions, and numerous other applications. The interaction between surfactants and dyes is assessable through resulting changes in absorption and emission of the light-active compound, and this principle has permitted the use of the closely related Pinacyanol chloride in determining physical and chemical information of cationic surfactants, micelles, and vesicles. The dimer of 1,1’-Diethyl-2,2’-carbocyanine iodide also absorbs and this dimerization can be monitered by changes in the observed absorption wavelength of a sample.
Technical Information
Physical State:Solid
Solubility:Soluble in ethanol.
Storage:Desiccate at 4° C
Melting Point:295° C (lit.)(dec.)
pK Values:pKb: 11.25
Safety and Reference Information
Transport:UN 2811, Class 6.1, Packing group II
WGK Germany:3
PubChem CID:5463350
MDL Number:MFCD00011975
EC Number:210-099-4
Beilstein Registry:4117070
For Research Use Only. Not Intended for Diagnostic or Therapeutic Use.

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1. French, P.M., et al. 1987. Opt Lett. 12: 684-686. PMID: 19741839
2. Mishra, A., et al. 2000. Chem. Rev. 100: 1973-2012. PMID: 11749281
3. Sabate, R., et. al. 2001. J Colloid Interface Sci. 233: 205-210. PMID: 11121267
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