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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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14337-53-2
2-(5-Bromo-2-pyridylazo)-5-(diethylamino) phenol
547-58-0
Methyl orange, ACS reagent, dye content 85%
2150-48-3
Pyronin B
3567-69-9
Carmoisine A
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