Acid Brown 32
Name:C.I.Acid Brown 32,C.I.23000
Molecular Structure: Double azo class
Molecular Formula:C28H18C12N7Na3O10S3
Molecular Weight: 848.56
CAS Registry Number: 6375-57-1
Manufacturing Methods : 4-(4-Amino-2-chlorophenyl)-3-chlorobenzenamine double nitriding, in acid conditions and 4,6-Diaminobenzene-1,3-disulfonic acid, and then in three alkaline conditions and 6-Amino-4-hydroxynaphthalene-2-sulfonic acid coupling.
Properties and Applications: red light brown. Soluble in water for orange brown, slightly soluble in ethanol for orange red. For the strong sulfuric acid in purplish red, orange is palm diluted. In water solution to join strong hydrochloric acid for orange brown; Add thick sodium hydroxide solution for orange brown.
Standard | Light Fastness | Soaping | Persperation Fastness | Oxygen bleaching | Fastness to seawater | |||
Fading | Stain | Fading | Stain | Fading | Stain | |||
ISO | 3-4 | 4 | 4 |
List of Suppliers:
Selan Printing Brown 3R( Bayer Group )