Description
NIR-789 Heptamethine- is a polymethine cyanine dye offered as the sodium salt, bearing CAS number 162093-39-2 and empirical formula C₄₃H₃₉Cl₃N₂O₅S. Its molar mass is 812,29 g/mol, and the absorption maximum in methanol is 789 nm, placing the chromophore in the near-infrared range relevant to advanced optical and analytical methods. The product is As a heptamethine cyanine within the polymethine dye class, it is intended for research contexts that require a defined NIR-absorbing structure and documented optical data. Material from manufacturer Carl ROTH supports experiments in which absorption wavelength, molecular composition and pack integrity matter for method reliability. Scientists working with dyes and pigments can use NIR-789 for methanol-based absorption studies, probe-oriented investigations or instrument qualification where a sodium-salt cyanine is preferred. The clearly specified absorption maximum and empirical formula help align experimental design with the optical window of interest in chemical and life-science laboratories.
This article belongs on Fluorescent dyes & labels, in Dyes, stains & indicators.
Key features
- CAS number: 162093-39-2
- Pack sizes: 1 g, 5 g, 10 g
- EG nr.: 812-535-4
- Molar mass: 812,29 g/mol
- Form: Cyanine sodium salt
- Technical Information Sheet:
- Safety Data Sheet:
Compliance & Safety Information
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Hazard Statements (H-Phrases)
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Questions about S 0804 - FEW Chemicals, 789 nm in MeOH, 1 g, glass
What is this article?
S 0804 - FEW Chemicals, 789 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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