Direct Red 121
Name:C.I.Direct Red 121,C.I.28250
Molecular Structure: Double azo class
C.I.Direct Red 121,C.I.28250,CAS 5979-32-8,704.64,C30H22N6Na2O8S2,Direct Diazo Bordeaux B,Direct Diazo Bordeaux FB
Molecular Formula:C30H22N6Na2O8S2
Molecular Weight: 704.64
CAS Registry Number:5979-32-8
Manufacturing Methods : 3-Aminobenzenesulfonic acid diazo, and a coupling m-Toluidine
, its product to diazo, and 7-(4-Aminobenzamido)-4-hydroxynaphthalene-2-sulfonic acid coupling.
Properties and Applications: red to blue light Claret. For bright red is soluble in water, soluble in ethanol for product red. The strong sulfuric acid in blue, diluted red for brown. The dye solution to join strong hydrochloric acid for red light brown; Add thick sodium hydroxide solution for purplish red color, have precipitation
| Standard | Acid Resistance | Alkali Resistance | Light Fastness | Soaping | Water | ||
| Fading | Stain | Fading | Stain | ||||
| ISO | 4 | 4 | 3 | 4 | 4 | ||
| AATCC | 5 | 5 | 3 | 2-3 | 3 | ||
List of Suppliers:
Direct Diazo Bordeaux B ( Joint Stock Company ‘Coioros’ )
Direct Diazo Bordeaux FB(Colorom SA)