can't read?
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 of 3,3'-([1,1'-biphenyl]-4,4'-diyl)bis(4-aminonaphthalene-1-sulfonic acid) (formula: C32H22N6Na2O6S2; molecular weight: 696.66 g/mol). 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 2465 (OTTO) Congo red, indicator Cas 573-58-0 - used with litmus paper in a simple parlor trick: add a drop or two of Congo red to both an acid solution and a base solution.
Hazard Codes T
Certificate Of Analysis
(For eg. B 1615-0108)
Other Documents
For any quries, please write to us at
7143-21-7
β-Naphthol violet
24886-73-5
1-Azidoadamantane, 97%
77-09-8
Phenolphthalein, indicator
493-52-7
Methyl red
Our team of R&D Experts and Scientists have expertise in all areas of research of Lab Chemicals, Nano Technology, Life Science, Custom Synthesis, Chromatography, and many others.
DisclaimerThe above particulars do not release the customer from the obligation to carry out an inspection of goods received. Not for medical, household or any other uses, for lab use only, Please test before use.