Description / Application
Congo Red is an indicator dye that is blue-violet at pH 3.0 and red at pH 5.0. It contains a 3,3'-(biphenyl-4,4'-diyldidiazene-2,1-diyl)bis(4-aminonaphthalene-1-sulfonate). It is functionally related to a 3,3'-(biphenyl-4,4'-diyldidiazene-2,1-diyl)bis(4-aminonaphthalene-1-sulfonic acid).
Identities
| Alternative Name | Direct Red 28 |
|---|---|
| Molecular Formula | C32H22N6Na2O6S2 |
| Molecular Weight | 696.7 |
| MFCD | MFCD00004028 |
Safety
| Pictograms |
|
|---|---|
| Signal Word | Danger |
| Hazard Statements | H319;H350;H361 |
| Precautionary Statements | P201;P202;P264;P280;P305+P351+P338;P308+P313;P337+P313;P405;P501 |