Description
Congo Red (C.I. 22120), for microscopy, Molar mass (M) 696,66 g/mol, CAS No. 573-58-0, EC No. 209-358-4, Empirical formula C32H22N6Na2O6S2
Azo dye, soluble in water (colloidal solution) and ethanol. A 1 % solution in ethanol is used for detection of amyloid proteins (= abnormally mutated proteins).
| Colour conversion | blue - red |
| Transition range pH | 3,0 - 5,2 |
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Questions about Congo Red (C.I. 22120), for microscopy, 5 g, glass
What is this article?
Congo Red (C.I. 22120), for microscopy, 5 g, glass is the article on this page. Luminix Health distributes Carl Roth for laboratory use. It sits in Indicators & indicator solutions, inside Analytical standards & reference materials, in Lab chemicals.
An indicator solution changes colour at a stated point, usually a pH interval or a redox potential, so a titration endpoint can be seen. The solvent and the concentration decide how sharp the change is. A solid indicator dye and a ready solution are different articles.
A reference material is the article against which another result is compared. Its value is stated, and the uncertainty of that value is part of the product. An ICP or ion standard is a solution of known concentration. A volumetric standard is for titration. A chromatography standard is the peak you match. The grade names, including pharmacopoeia and ASTM, say which impurities were limited. Identity is checked on PubChem. Names follow IUPAC. Medicinal grades follow the European Pharmacopoeia and USP.
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The category is Analytical standards & reference materials. The sub-category is Indicators & indicator solutions. The catalogue is Lab chemicals.
Shelves beside this one are ICP, AAS & ion standards, Chromatography standards (GC, HPLC, pesticides), Reference substances & reagents (other), Volumetric standard solutions (titration), Reagents for analysis (Ph. Eur., ASTM, DIN) and Spectroscopy & physical property standards.
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The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.