| Congo Red,indicator grade |
| abcol congo red |
| Sodium diphenyl diazo-bis-naphthylamine-4-sulfonate |
| Direct red C.R.Y. |
| C.T.NO,22120 |
| Sodi-um diphenyl-bis-(azo-naphthionate) |
| Direct scarlet 4B |
| C.I. Direct red 28 |
| 3,3'-(4,4'-biphenylenebis(azo))bis(4-amino-1-naphthalenesulfonic aci disodi |
| 1-naphthalenesulfonic acid, 3,3'-((1,1'-biphenyl)-4,4'-diylbis(azo))bis(4-amino |
| 1-naphthalenesulfonic acid, 3,3'-[[1,1'-biphenyl]-4,4'-diylbis(azo)]bis[4-amino |
| atlantic congo red |
| atul congo red |
| azocard red congo |
| benzo congo red |
| brasilamina congo 4b |
| c.i. 22120 |
| c.i. direct red 28, disodium salt |
| cerven kongo |
| cerven prima 28 |
| congo red |
| congo red 4b |
| congo red 4bx |
| congo red cr |
| congo red h |
| congo red ici |
| congo red l |
| congo red m |
| congo red n |
| congo red r |
| congo red rs |
| congo red w |
| congo red ws |
| cotton red 4bc |
| cotton red 5b |
| cotton red l |
| diacotton congo red |
| direct red 28 |
| direct red c |
| direct red dc-cf |
| direct red k |
| erie congo 4b |
| haemomedical |
| haemonorm |
| hemorrhagyl |
| hispamin congo 4b |
| kayaku congo red |
| kongorot |
| mitsui congo red |
| natrium-salz der diphenyl-bis-azo-bis-naphthylamin-4-sulfonsaeure |
| peeramine congo red |
| red k |
| sodium diphenyldiazo-bis(alpha-naphthylaminesulfonate) |
| sodium diphenyldiazo-bis-alpha-naphthylamine-sulfonate |
| solucongo |
| sugai congo red |
| tertrodirect red c |
| trisulfon congo red |
| vondacel red cl |
