Description
Eosin B (C.I. 45400) is a dye specified for microscopy, with CAS number 548-24-3, EG number 208-943-1 and the empirical formula C₂₀H₆Br₂N₂Na₂O₉. The molar mass is 624,09 g/mol. Colour index C.I. 45400 stands with the Eosin B name so that stain recipes and reagent inventories can be matched without ambiguity. The empirical formula and molar mass support accurate weighing when microscopy solutions are prepared from the solid. Eosin B (C.I. 45400) from manufacturer Carl ROTH is supplied in the for-microscopy grade given by the producer. Packed in glass, is intended for laboratory microscopy work that requires this colour-index material. CAS number 548-24-3 and EG number 208-943-1 provide the regulatory identity for orders and safety documentation. It sits among analytical chemicals and indicators used for microscopy staining. The combination of C.I. 45400, formula C₂₀H₆Br₂N₂Na₂O₉ and molar mass 624,09 g/mol gives a complete identity for this.
This article is part of Microscopy stains & staining solutions, in Dyes, stains & indicators.
Key features
- Appearance: dark red powder
- Maximum absorption: 510-530 nm
- CAS number: 548-24-3
- Pack sizes: 10 g, 25 g, 50 g
- EG nr.: 208-943-1
- Empirical formula: C₂₀H₆Br₂N₂Na₂O₉
- Molar mass: 624,09 g/mol
- Technical Information Sheet:
- Safety Data Sheet:
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Questions about Eosin B (C.I. 45400), for microscopy, 10 g, glass
What is this article?
Eosin B (C.I. 45400), for microscopy, 10 g, glass is the article on this page. Luminix Health distributes Carl Roth for laboratory use. It sits in Microscopy stains & staining solutions, inside Dyes, stains & indicators, in Lab chemicals.
A microscopy stain binds a structure so it can be seen: haematoxylin on nuclei, eosin on cytoplasm, Gram reagents on a bacterial wall. A ready solution and a dry dye to be dissolved are different articles. The method names the stain. A substitute dye is a different method.
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 Microscopy stains & staining solutions. The catalogue is Lab chemicals.
Shelves beside this one are Fluorescent dyes & labels and Dyes & pigments.
What should I check before I order?
The technical information on this page is the manufacturer's sheet. Read that, not a rewritten specification.
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. Delivery across Europe, two to five days when in stock. 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.
