Congo Red

An acid dye used in testing for hydrochloric acid in gastric contents. It is also used histologically to test for AMYLOIDOSIS.

Also Known As:

Red, Congo; 1-Naphthalenesulfonic acid, 3,3'- ((1,1'- biphenyl)- 4,4'- diylbis(azo))bis(4- amino)- , disodium salt

Pharmalogical Action Categories:

Organic Chemicals: 133
- Hydrocarbons: 1713
  - Cyclic Hydrocarbons: 97
    - Aromatic Hydrocarbons: 291
      - Polycyclic Aromatic Hydrocarbons: 2020
        Naphthalenes: 18
        Naphthalenesulfonates: 2
        Congo Red: 1141
- Sulfur Compounds: 278
  - Sulfur Acids
    - Sulfonic Acids: 1605
      - Arylsulfonic Acids
        Arylsulfonates: 1
        Naphthalenesulfonates: 2
        Congo Red: 1141
Polycyclic Compounds: 6
- Polycyclic Aromatic Hydrocarbons: 2020
  - Naphthalenes: 18
    - Naphthalenesulfonates: 2
      - Congo Red: 1141

sodium 3,4-diaminonaphthalene-1-sulfonate