Description
Indigo carmine (C.I. 73015) is an analytical-grade dye supplied at min. 80 %, p.a., for laboratory indicator work. It is identified by CAS number 860-22-0 and EG nr. 212-728-8, with the empirical formula C₁₆H₈N₂Na₂O₈S₂ and a molar mass of 466,36 g/mol. Physical data include a density of 0,714 g/cm³ and a flash point above 250 °C. The C.I. 73015 designation links the material to the established indigo carmine colour index entry used in analytical practice. Clear labelling of CAS, EG number, molar mass and formula helps laboratories document reagent identity in methods, SOPs and quality records without ambiguity.
This article belongs on Microscopy stains & staining solutions, in Dyes, stains & indicators.
Key features
- Appearance: dark blue to purple powder
- Dye content: ≥80 %
- Loss on drying: ≤5 %
- Heavy metals (as Pb): ≤0,004 %
- Arsenic (As): ≤0,0008 %
- Cadmium (Cd): ≤0,0001 %
- Mercury (Hg): ≤0,0001 %
- CAS number: 860-22-0
- Pack sizes: 25 g, 100 g
- EG nr.: 212-728-8
- Purity: min. 80 %, p.a.
- Empirical formula: C₁₆H₈N₂Na₂O₈S₂
- Molar mass: 466,36 g/mol
- Technical Information Sheet:
- Safety Data Sheet:
Compliance & Safety Information
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Precautionary Statements (P-Phrases)
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Questions about Indigo carmine (C.I. 73015), min. 80 %, p.a., 25 g, glass
What is this article?
Indigo carmine (C.I. 73015), min. 80 %, p.a., 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.
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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.
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