dye|World dye variety

Name:C.I.Direct Green 42,C.I.28290

Molecular Structure: Double azo class

C.I.Direct Green 42,C.I.28290,CAS 5938-86-3,908.78,C37H23N6Na3O12S3,Diazo Light Green GF

Molecular Formula:C₃₇H₂₃N₆Na₃O₁₂S₃

Molecular Weight: 908.78

CAS Registry Number:5938-86-3

Manufacturing Methods :  6-Aminonaphthalene-1-sulfonic acid diazo, and 8-Amino-4-hydroxynaphthalene-2-sulfonic acid coupling, again diazo, and 7-(4-Aminobenzamido)-4-hydroxynaphthalene-2-sulfonic acid coupling, and then hydrolysis ethyl ester base.

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

List of Suppliers:

Diazo Light Green GF( Bayer Group )