Description
NIR-798 Heptamethine-Cyanine Chloride is a polymethine cyanine dye supplied as the chloride salt for laboratory use in the near-infrared spectral range. It is identified by CAS number 440102-72-7, empirical formula C₃₉H₄₁ClN₆S and molar mass 661,31 g/mol, with an absorption maximum in methanol of 798 nm. This heptamethine cyanine structure places the dye among NIR-active polymethine chromophores used in spectroscopic and dye chemistry work. The material is Absorption data refer to methanolic solution, supporting wavelength selection and method development around 798 nm. As a defined cyanine chloride, it fits workflows that require a characterised NIR dye with documented molecular weight and elemental composition. The product is available from manufacturer Carl ROTH within the polymethine dye range and is intended for professional laboratory handling according to standard chemical practice.
This article is part of Fluorescent dyes & labels, in Dyes, stains & indicators.
Key features
- CAS number: 440102-72-7
- Pack sizes: 1 g, 5 g, 10 g
- EG nr.: 692-851-5
- Empirical formula: C₃₉H₄₁ClN₆S
- Absorption maximum (MeOH): 798 nm
- Safety Data Sheet:
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Hazard Statements (H-Phrases)
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Questions about S 0507 - FEW Chemicals, 798 nm in MeOH, 1 g, glass
What is this article?
S 0507 - FEW Chemicals, 798 nm in MeOH, 1 g, glass is the article on this page. Luminix Health distributes Carl Roth for laboratory use. It sits in Fluorescent dyes & labels, inside Dyes, stains & indicators, in Lab chemicals.
A fluorescent dye absorbs at one wavelength and emits at a longer one. As a label it is attached to a protein, a nucleic acid or a cell. Excitation and emission maxima, and the reactive group if it must conjugate, are the specification. The colour name does not tell you the wavelengths.
A dye or a stain binds, or changes colour, so that something invisible becomes visible. An indicator changes at a pH or a redox point. A fluorescent dye absorbs one wavelength and emits another, which is how a microscope or a plate reader picks it out. The excitation and emission, or the transition interval, are the specification. The colour name on the label is not. Structures are on PubChem under IUPAC names. Methods are in the PubMed literature.
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