Description
NIR-823 heptamethine cyanine sodium salt is a near-infrared polymethine dye supplied as a cyanine sodium salt for spectroscopic and imaging-related laboratory work. It carries CAS number 162093-44-9, EG number 812-721-5 and the empirical formula C₄₆H₄₈ClN₂Na₃O₁₂S₄, with a molar mass of 1053,56 g/mol. In methanol the absorption maximum is reported at 823 nm, placing the chromophore firmly in the NIR window used for dye characterisation, optical labelling studies and related analytical applications. The material belongs to the heptamethine cyanine family within the broader class of polymethine dyes and pigments. This from manufacturer Carl ROTH provides a convenient research quantity for method development, reference measurements and formulation trials. Handle and store according to the accompanying safety documentation and apply standard laboratory practice for organic dyes. The defined absorption maximum, documented molecular identity and compact pack size support reproducible work in chemical, materials and life-science laboratories that require NIR-active cyanine reagents.
This article is part of Fluorescent dyes & labels, in Dyes, stains & indicators.
Key features
- CAS number: 162093-44-9
- Pack sizes: 1 g, 5 g, 10 g
- EG nr.: 812-721-5
- Empirical formula: C₄₆H₄₈ClN₂Na₃O₁₂S₄
- Molar mass: 1053,56 g/mol
- Safety Data Sheet:
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Hazard Statements (H-Phrases)
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Questions about S 2180 - FEW Chemicals, 823 nm in MeOH, 1 g, glass
What is this article?
S 2180 - FEW Chemicals, 823 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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