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
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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