dye|World dye variety

Name:C.I.Direct Blue 26,C.I.31930

Molecular Structure: trisazo class

C.I.Direct Blue 26,C.I.31930,CAS 7082-31-7,1030.9,C44H29N6Na3O14S3

Molecular Formula:C₄₄H₂₉N₆Na₃O₁₄S₃

Molecular Weight: 1030.9

CAS Registry Number:7082-31-7

Manufacturing Methods : 3,3′-Dimethylbenzidine double nitriding, in alkaline conditions and 6-Amino-4-hydroxynaphthalene-2-sulfonic acid  coupling, and then diazo, and 4,5Dihydroxynaphthalene-1-sulfonic acid (2 Moore) coupled.

Properties and Applications:  red light navy blue. Soluble in water for hidden cyan, soluble in ethanol. The strong sulfuric acid for blue, shallow purple for diluted. The dye solution to join strong hydrochloric acid have hidden cyan precipitation; Add thick sodium hydroxide solution has the purple precipitation.

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