Description
VIS-504 trimethine oxacarbocyanine sodium salt is a polymethine dye for laboratory use, identified by CAS number 35501-76-9 and empirical formula C₃₉H₃₉N₂NaO₈S₂. Its molar mass is 750,86 g/mol, and the absorption maximum in methanol is 504 nm, placing the chromophore in the green-visible region for spectroscopic and dye applications. The product is EG number 631-539-5 supports substance identification alongside the CAS entry. This oxacarbocyanine sodium salt is offered from manufacturer Carl ROTH under the VIS-504 trimethine designation for users who require a defined absorption maximum and molecular composition. Typical use cases include optical characterisation, polymethine dye studies and method development where a 504 nm MeOH absorption peak is specified. provides a convenient quantity for calibration, screening and small-scale experimental work based solely on the stated chemical identity, molar mass and spectral maximum.
This article is part of Fluorescent dyes & labels, in Dyes, stains & indicators.
Key features
- CAS number: 35501-76-9
- Pack sizes: 1 g, 5 g, 10 g
- EG nr.: 631-539-5
- Empirical formula: C₃₉H₃₉N₂NaO₈S₂
- Molar mass: 750,86 g/mol
- Technical Information Sheet:
- Safety Data Sheet:
Compliance & Safety Information
WarningHazard Statements (H-Phrases)
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Questions about VIS-504 Trimethine-, Oxacarbocyanin Sodium Salt, 1 g, glass
What is this article?
VIS-504 Trimethine-, Oxacarbocyanin Sodium Salt, 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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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.
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