dye|World dye variety

Name:C.I.Direct Yellow 15,C.I.25220

Molecular Structure: Double azo class

C.I.Direct Yellow 15,C.I.25220,CAS 2896-76-6,635.49,C30H19N7Na2O7,Benzo Yellow LTRL

Molecular Formula:C₃₀H₁₉N₇Na₂O₇

Molecular Weight: 635.49

CAS Registry Number:2896-76-6

Manufacturing Methods : 4-Nitrobenzenamine diazo, coupled with 2-Hydroxybenzoic acid, will the nitro reduction, and 4-Amino-N-(4-aminophenyl)benzamide condensation , then the nitro reduction, and then diazo, and 3-Methyl-1-phenyl-1H-pyrazol-5(4H)-one  coupling.

Properties and Applications:  red light yellow. Moderate soluble in water for golden brown, soluble in ethanol. The strong sulfuric acid for gold in orange, for yellow brown after diluted. The dye solution to join strong hydrochloric acid for golden brown, precipitation; Add thick sodium hydroxide solution for gold orange.

List of Suppliers:

Benzo Yellow LTRL( Verona Division of Baychem Corp. )