dye|World dye variety

Name:C.I.Direct Blue 55,C.I.27940

Molecular Structure: Double azo class

C.I.Direct Blue 55,C.I.27940,CAS 6492-60-0,849.75,C36H22N5Na3O10S3

Molecular Formula:C₃₆H₂₂N₅Na₃O₁₀S₃

Molecular Weight: 849.75

CAS Registry Number:6492-60-0

Manufacturing Methods : 4-Aminonaphthalene-1,6-disulfonic acid diazo, and Naphthalen-1-amine coupling, its product to diazo, in alkaline conditions and 4-Hydroxy-7-(phenylamino)naphthalene-2-sulfonic acid coupling.

Properties and Applications:  red light blue. Soluble in water for deep purple, and adequate soluble in alcohol. The strong sulfuric acid as dark blue in green, for purple diluted. The dye solution to join strong hydrochloric acid for red light blue precipitation; Add thick sodium hydroxide solution for red light purple, have precipitation.

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