Description
Brilliant Blue R 250 (C.I. 42660) is a dye for electrophoresis, identified by CAS number 6104-59-2 and empirical formula C₄₅H₄₄N₃NaO₇S₂. It has a molar mass of 825,99 g/mol and a density of 1 g/cm³, giving laboratories clear molecular parameters for solution preparation and method documentation. The Colour Index designation C.I. 42660 supports correct specification in protein staining and related gel-based separation workflows used in biochemistry and molecular biology. Identity data including EG number 228-060-5 aid regulatory and inventory records. This material from manufacturer Carl ROTH integrates into established polyacrylamide and comparable gel staining procedures where reproducible dye selection matters. Defined composition and physical constants help maintain consistent staining baths when laboratories follow validated electrophoresis protocols in research and analytical settings.
This article is part of Microscopy stains & staining solutions, in Dyes, stains & indicators.
Key features
- Appearance: blue to purple powder
- Absorption max. (in EtOH): 580-600 nm
- Loss on drying (110 °C): ≤10 %
- CAS number: 6104-59-2
- Pack sizes: 10 g, 100 g
- EG nr.: 228-060-5
- Empirical formula: C₄₅H₄₄N₃NaO₇S₂
- Molar mass: 825,99 g/mol
- Density: 1 g/cm³
- Technical Information Sheet:
- Safety Data Sheet:
Recently viewed
You may also like
Browse related categories
Category
Sub-category
Microscopy stains & staining solutions
Catalogue
Brand
Questions about Brilliant Blue R 250 (C.I. 42660), for electrophoresis, 10 g, glass
What is this article?
Brilliant Blue R 250 (C.I. 42660), for electrophoresis, 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. 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.