Description
Squaraine VIS-668 is a squaraine dye designated as bis(tetramethyl-benzoquinolizin-hydroxy), with CAS number 358727-55-6 and EG number 812-701-6. Its empirical formula is C₃₆H₄₄N₂O₄ and the molar mass is 568,76 g/mol. The absorption maximum in methanol (MeOH) is 668 nm. This material is The combination of a registered CAS number, EG number and fully stated empirical formula supports clear identification in chemical catalogues and safety documentation. Squaraine VIS-668 belongs to the group of specialised organic dyes used in research settings that require a defined visible absorption maximum near 668 nm. allows convenient handling for weighing and solution preparation. Laboratories working with dyes and related chromophores can select this product when the bis(tetramethyl-benzoquinolizin-hydroxy) structure together with the listed optical and molecular data are required. Molecular mass, absorption wavelength and formula data support comparison with other squaraine reagents during method setup.
This article is part of Fluorescent dyes & labels, in Dyes, stains & indicators.
Key features
- CAS number: 358727-55-6
- Pack sizes: 1 g, 5 g, 10 g
- EG nr.: 812-701-6
- Empirical formula: C₃₆H₄₄N₂O₄
- Molar mass: 568,76 g/mol
- Technical Information Sheet:
- Safety Data Sheet:
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Questions about S 2084 - FEW Chemicals, 668 nm in MeOH, 1 g, glass
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S 2084 - FEW Chemicals, 668 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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