Congo red, indicator
: 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.
Properties
Safety Information
Hazard Codes T
Risk Statements 45-63
Safety Statements 53-45
WGK Germany 3
| Packings | Price (INR) |
|
25 gm
|
261.00
|
|
100 gm
|
594.00
|
|
250 gm
|
1269.00
|
|
1 kg
|
4491.00
|
|
4 x 25 kg
|
POR
|