Description
Evan's blue (C.I. 23860) is a microscopy-grade azo dye supplied for biological staining and related laboratory visualisation work. It is identified by CAS number 314-13-6 and EG nr. 206-242-5, with the empirical formula C₃₄H₂₄N₆Na₄O₁₄S₄ and a molar mass of 960,82 g/mol, supporting accurate preparation of staining baths and stock solutions. The material is Listed among dyes and pigments for biological applications, Evan’s blue is chosen when a defined Colour Index reference and full molecular data are required alongside practical bench packaging. The tetrasodium sulfonate salt form aids aqueous handling typical of biological dye protocols. This grade from manufacturer Carl ROTH offers documented identity for laboratories that standardise microscopy reagents. Use within established staining procedures and institutional safety guidance for biological dyes.
This article belongs on Dyes & pigments, in Dyes, stains & indicators.
Key features
- Appearance: black to purple cryst. powder
- Appearance of solution (0,1 % in H2O): clear, blue
- Loss on drying (110 °C): ≤10 %
- CAS number: 314-13-6
- Pack sizes: 5 g, 25 g, 100 g
- EG nr.: 206-242-5
- Empirical formula: C₃₄H₂₄N₆Na₄O₁₄S₄
- Molar mass: 960,82 g/mol
- Technical Information Sheet:
- Safety Data Sheet:
Compliance & Safety Information
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Hazard Statements (H-Phrases)
Precautionary Statements (P-Phrases)
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Questions about Evan's blue (C.I. 23860), for microscopy, 5 g, glass
What is this article?
Evan's blue (C.I. 23860), for microscopy, 5 g, glass is the article on this page. Luminix Health distributes Carl Roth for laboratory use. It sits in Dyes & pigments, inside Dyes, stains & indicators, in Lab chemicals.
A dye dissolves. A pigment is a particle dispersed in a medium. On this shelf they are the colouring substances used as reagents or as markers, specified by Colour Index name or by structure where it is known. The same common name can hide two constitutions.
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 Dyes & pigments. The catalogue is Lab chemicals.
Shelves beside this one are Fluorescent dyes & labels and Microscopy stains & staining solutions.
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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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.