Description
NIR-799 Heptamethine cyanine NEt3H+ is a polymethine dye with CAS number 835900-90-8 and empirical formula C₅₅H₆₈Cl₂N₄O₆S₂. It displays an absorption maximum of 799 nm in methanol and a molar mass of 1016,19 g/mol, positioning the chromophore firmly in the near-infrared window. The extended conjugated structure and triethylammonium counterion support characterisation and formulation experiments that require a defined absorption response near 799 nm. Research groups focused on polymethine dye chemistry can use this cyanine for comparative screening, method development, and analytical measurements in methanol and related media. The product is available from manufacturer Carl ROTH as a specialised NIR heptamethine dye for chemical laboratory applications. Its EG number is 812-717-3. Supplied in gram quantity, it suits workflows that need a documented NIR cyanine without expanding beyond standard laboratory dye handling practices.
This article is part of Fluorescent dyes & labels, in Dyes, stains & indicators.
Key features
- CAS number: 835900-90-8
- Pack sizes: 1 g, 5 g, 10 g
- EG nr.: 812-717-3
- Empirical formula: C₅₅H₆₈Cl₂N₄O₆S₂
- Molar mass: 1016,19 g/mol
- Technical Information Sheet:
- Safety Data Sheet:
Compliance & Safety Information
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Hazard Statements (H-Phrases)
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Questions about S 2163 - FEW Chemicals, 799 nm in MeOH, 1 g, glass
What is this article?
S 2163 - FEW Chemicals, 799 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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