Name:C.I.Direct Red 1,C.I.22310
Molecular Structure: Double azo class
C.I.Direct Red 1,C.I.22310,CAS 2429-84-7,591.84,C30H19N5Na2O6,Direct Red F,Congo red,Congo red F,Direct Fast Red F
Molecular Formula:C30H19N5Na2O6
Molecular Weight: 591.84
CAS Registry Number:2429-84-7
Manufacturing Methods : 4-(4-Aminophenyl)benzenamine double nitriding, first with 2-Hydroxybenzoic acid coupling, again in acid conditions and 6-Amino-4-hydroxynaphthalene-2-sulfonic acid coupling.
| Standard | Acid Resistance | Alkali Resistance | Light Fastness | Soaping | Water |
| Fading | Stain | Fading | Stain |
| ISO | 3-4 | 4 | 2-3 | 2 | | 2 | |
| AATCC | 4 | 4 | 4 | 2 | | 3-4 | |