Acid Black 18
Name:C.I.Acid Black 18,C.I.27790
Molecular Structure: Double azo class
C.I.Acid Black 18,C.I.27790,CAS 6227-09-4,723.6,C26H16N5Na3O10S3
Molecular Formula:C26H16N5Na3O10S3
Molecular Weight: 723.6
CAS Registry Number:6227-09-4
Manufacturing Methods : 4-Aminobenzenesulfonic acid diazo, and Naphthalen-1-amine coupling, its product to diazo, in alkaline conditions and 4-Amino-5-hydroxynaphthalene-2,7-disulfonic acid coupling.
Properties and Applications: blue and black. Soluble in water for a blue-black, easily soluble in soluble fiber element, insoluble in other organic solvents. In the dark for the strong sulfuric acid, after diluted blue-black precipitation; In the dark for strong nitric acid solution, and then into a chestnut; In 10% of sodium hydroxide solution for black solution in red.
| Standard | Light Fastness | Soaping | Persperation Fastness | Oxygen bleaching | Fastness to seawater | |||
| Fading | Stain | Fading | Stain | Fading | Stain | |||
| ISO | 6-7 | 4 | 3-4 | 3 | 4 | 4 | 4 | 3-4 |
| AATCC | 7-8 | 4 | 4 | 1 | 2 | 2 | 3 | 3 |
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