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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

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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