Acid Black 5
Name:C.I.Acid Black 5,C.I.27510
Molecular Structure: Double azo class
Molecular Formula:C26H16N4Na2O8S2
Molecular Weight: 622.54
CAS Registry Number:
Manufacturing Methods : 4-Aminobenzenesulfonic acid diazo, and Naphthalen-1-amine coupling, its product to diazo, and 4,5Dihydroxynaphthalene-1-sulfonic acid coupling.
Properties and Applications: black. Soluble in water for dark purple, slightly soluble in alcohol for violet blue. The strong sulfuric acid for green, diluted into purple. In water solution to join strong hydrochloric acid for purplish red color; Add thick sodium hydroxide solution for dark.
Standard | Light Fastness | Soaping | Persperation Fastness | Oxygen bleaching | Fastness to seawater | |||
Fading | Stain | Fading | Stain | Fading | Stain | |||
ISO | 6-7 | 3 | 2-3 | 2-3 |
List of Suppliers:
Victoria Black B( Bayer Group )