Description
NIR-781 Heptamethine cyanine iodide is a polymethine near-infrared dye supplied as the iodide salt for spectroscopic and labelling work. It carries CAS number 207399-07-3, the empirical formula C₃₆H₄₄ClIN₂ and a molar mass of 667,12 g/mol. In methanol the absorption maximum is 781 nm, placing the chromophore firmly in the NIR window used for deep-tissue imaging, fluorescence assays and optical sensor development. The material is As a heptamethine cyanine, the extended polymethine chain supports strong long-wavelength absorption typical of this dye class. The product is available from manufacturer Carl ROTH and is listed under EG nr. 681-548-3. Researchers in bioimaging, photochemistry and analytical optics can integrate this dye into staining protocols, probe design or calibration standards where a defined NIR absorption profile is required. Handle according to standard laboratory practice for organic dyes and consult the accompanying safety documentation before use.
This article is part of Fluorescent dyes & labels, in Dyes, stains & indicators.
Key features
- CAS number: 207399-07-3
- Pack sizes: 1 g, 5 g, 10 g
- EG nr.: 681-548-3
- Empirical formula: C₃₆H₄₄ClIN₂
- Molar mass: 667,12 g/mol
- Technical Information Sheet:
- Safety Data Sheet:
Compliance & Safety Information
Warning
Hazard Statements (H-Phrases)
Recently viewed
You may also like
Browse related categories
Category
Sub-category
Catalogue
Brand
Questions about S 0943 - FEW Chemicals, 781 nm in MeOH, 1 g, glass
What is this article?
S 0943 - FEW Chemicals, 781 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.
Which category should I open next?
The category is Dyes, stains & indicators. The sub-category is Fluorescent dyes & labels. The catalogue is Lab chemicals.
Shelves beside this one are Microscopy stains & staining solutions and Dyes & pigments.
What should I check before I order?
When this page shows a safety data sheet, use that manufacturer file. Hazard text does not belong in the sales description. For a pack size, a grade or a certificate that is not on the page, send a quote request or contact the team.
How does ordering and shipping work?
Luminix Health distributes this article from the heart of Europe. Articles in stock ship within 2–5 business days. Standard delivery is free from €250 excl. VAT. Cold-chain goods and dangerous goods under ADR are never included in that free delivery. The terms are in the Shipping Policy. The full brand index is on shop by brand. Who we are is on about us.
Which other categories should I open?
The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.