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Synonyms: Congo Red 4B, Cosmos Red, Cotton Red B, Cotton Red C, Direct Red 28, Direct Red R, Direct Red Y
Congo red is the sodium salt, It is a secondary diazo dye. Congo red is water-soluble, yielding a red colloidal solution; its solubility is better in organic solvents such as ethanol.
C 5711 (OTTO) Congo red, certified Cas 573-58-0 - used to stain microscopic preparates, especially as a cytoplasm and erythrocyte stain.
WGK Germany 3
Certificate Of Analysis
(For eg. B 1615-0108)
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Rhodamine 6G, dye content, 99%
90217-02-0
5-Cyano-2,3-di-(p-tolyl)tetrazolium chloride, ≥85% (HPLC)
612-82-8
o-Tolidine hydrochoride, GR 99%+
77-09-8
Phenolphthalein, GR
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