Description
Coumarin UV-389 methyl tetramethylbenzoquinolizine is a specialty organic dye reagent with CAS number 113869-04-8 and empirical formula C₂₀H₂₅NO₂. It exhibits an absorption maximum of 389 nm in methanol and has a molar mass of 311,42 g/mol, with EG number 812-349-3. The benzoquinolizine structure supports research and analytical applications involving light absorption around the near-UV region. This grade is available from manufacturer Carl ROTH for chemical catalogues and method development. The compact supports economical use in method setup, reference measurements, and small-scale experimental series. Laboratories working with optical probes, dye chemistry, or absorption studies can incorporate the compound where a 389 nm methanol absorption maximum is specified. Clear identification via CAS, EG number, and molecular formula aids documentation and inventory control in research and quality environments.
This article is part of Fluorescent dyes & labels, in Dyes, stains & indicators.
Key features
- CAS number: 113869-04-8
- Pack sizes: 1 g, 5 g, 10 g
- EG nr.: 812-349-3
- Empirical formula: C₂₀H₂₅NO₂
- Molar mass: 311,42 g/mol
- Technical Information Sheet:
- Safety Data Sheet:
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Questions about Coumarin UV-389 Methyl Tetramethyl-, benzoquinolizine, 1 g, glass
What is this article?
Coumarin UV-389 Methyl Tetramethyl-, benzoquinolizine, 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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