dye|World dye variety

Name:C.I.Direct Brown 5,C.I.30135

Molecular Structure: trisazo class

C.I.Direct Brown 5,C.I.30135,CAS 6844-77-5,682.57,C31H20N6Na2O8S

Molecular Formula:C₃₁H₂₀N₆Na₂O₈S

Molecular Weight: 682.57

CAS Registry Number:6844-77-5

Manufacturing Methods :  4-(4-Aminophenyl)benzenamine double nitriding, first coupled with 2-Hydroxybenzoic acid, and then in alkaline conditions and 3-Aminobenzenesulfonic acid diazo, in acid conditions Resorcinol coupled with the product matches.

Properties and Applications: brown. Soluble in water for yellow brown, slightly soluble in alcohol. The strong sulfuric acid to red light purple, for yellow brown after diluted. The dye solution to join strong hydrochloric acid for orange brown, have precipitation; Add thick sodium hydroxide solution for red light orange brown.

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