Description
New fuchsin (C.I. 42520) is an extra pure dye for biological and laboratory staining applications. It carries CAS number 3248-91-7, EG nr. 221-831-7, empirical formula C₂₂H₂₄ClN₃ and a molar mass of 365,91 g/mol. Physical data include a density of 0,541 g/cm³, a flash point of 268 °C and a boiling point above 300 °C, supporting informed handling in controlled lab environments. Typical use includes biological staining and related dye preparations that benefit from a defined, extra pure grade. This product from manufacturer Carl ROTH provides a practical pack size for method setup, routine staining and formulation trials. Its clear identity as new fuchsin and documented physicochemical parameters help laboratories maintain consistent dye performance across biological application workflows and general chemical staining tasks.
This article is part of Microscopy stains & staining solutions, in Dyes, stains & indicators.
Key features
- Appearance: green to dark green powder
- Maximum absorption: 548-558 nm
- CAS number: 3248-91-7
- Pack sizes: 25 g, 50 g, 100 g
- EG nr.: 221-831-7
- Purity: extra pure
- Empirical formula: C₂₂H₂₄ClN₃
- Molar mass: 365,91 g/mol
- Technical Information Sheet:
- Safety Data Sheet:
Compliance & Safety Information
Warning
Hazard Statements (H-Phrases)
Precautionary Statements (P-Phrases)
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Questions about New fuchsin (C.I. 42520), extra pure, 25 g, glass
What is this article?
New fuchsin (C.I. 42520), extra pure, 25 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.
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The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.