Direct Blue 30
Name:C.I.Direct Blue 30,C.I.31955
Molecular Structure: trisazo class
C.I.Direct Blue 30,C.I.31955,CAS 6656-08-2,1116.95,C44H28N6Na4O16S4
Molecular Formula:C44H28N6Na4O16S4
Molecular Weight: 1116.95
CAS Registry Number:6656-08-2
Manufacturing Methods : 3,3′-Dimethoxylbenzidine double nitriding, first with Naphthalen-1-amine, and then three diazo, and 8-Hydroxynaphthalene-1,6-disulfonic acid (2 Moore) coupled.
Properties and Applications: dark green light blue. Soluble in water for blue, slightly soluble in ethanol for violet blue. The strong sulfuric acid for blue-ray green, dark after diluted precipitation; In nitric acid in red for black. The dye solution to join strong hydrochloric acid blue precipitation; Add thick sodium hydroxide solution have blue precipitation.
| Standard | Acid Resistance | Alkali Resistance | Light Fastness | Soaping | Water | ||
| Fading | Stain | Fading | Stain | ||||
| ISO | 3-4 | 4 | 3 | 1-2 | 1-2 | ||
| AATCC | 5 | 4-5 | 2-3 | 3 | 1-2 | ||
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