dye|World dye variety

Name:C.I.Direct Brown 6,C.I.30140

Molecular Structure: trisazo class

C.I.Direct Brown 6,C.I.30140,CAS 2893-80-3,682.57,C31H20N6Na2O8S

Molecular Formula:C₃₁H₂₀N₆Na₂O₈S

Molecular Weight: 682.57

CAS Registry Number:2893-80-3

Manufacturing Methods : 4-(4-Aminophenyl)benzenamine double nitriding, 4-Aminobenzenesulfonic acid coupled with first, then and Resorcinol coupling, 2-Aminobenzenesulfonic acid diazo, and formation of accidentally coupled nitrogen compounds.

Properties and Applications: brown. Soluble in water for yellow brown, slightly soluble in soluble fiber element, insoluble in other organic solvents. The strong sulfuric acid to red light purple, yellow light brown after diluted precipitation. The dye solution to join strong hydrochloric acid have yellow brown precipitation; Add thick, hydrogen oxidation solution for orange to red.

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