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Direct Green 51

Name:C.I.Direct Green 51,C.I.34260

Molecular Structure: trisazo class

C.I.Direct Green 51,C.I.34260,CAS 6428-19-9,1142.99,C45H30N8Na4O15S4

C.I.Direct Green 51,C.I.34260,CAS 6428-19-9,1142.99,C45H30N8Na4O15S4

Molecular Formula:C45H30N8Na4O15S4

Molecular Weight: 1142.99

CAS Registry Number:6428-19-9

Manufacturing Methods :3-Aminobenzenesulfonic acid diazo, and 8-Aminonaphthalene-2-sulfonic acid coupling, again diazo, and 5-Amino-7-ehtoxy-2-naphthalenesulfonic acid coupling, again diazo, and 7-(3-Aminobenzamido)-4-hydroxynaphthalene-2-sulfonic acid coupling (with aqueous ammonia in Pyridine medium the last step coupled).

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

Standard Acid Resistance Alkali Resistance Light Fastness Soaping Water
Fading Stain Fading Stain
ISO 4 4 5 4-5 4-5
AATCC 4-5 3-4

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