dye|World dye variety

Name:C.I.Mordant Orange 22,C.I.21570

Molecular Structure: Double azo class

C.I.Mordant Orange 22,C.I.21570,CAS 6492-53-1,654.40,C20H10N4Na4O12S2

Molecular Formula:C₂₀H₁₀N₄Na₄O₁₂S₂

Molecular Weight: 654.40

CAS Registry Number:6492-53-1

Manufacturing Methods : 4-Nitrobenzenamine diazotization, and 2-Hydroxybenzoic acid coupling , Reducing the nitro group, and then diazotization, coupling with 2-Hydroxybenzoic acid, and then sulfonated.

Properties and Applications: orange. Soluble in water for golden yellow, not soluble in ethanol. In concentrated sulfuric acid to red light purple, after dilution for green yellow until golden brown. Dye aqueous solution to join concentrated hydrochloric acid for green yellow until golden brown, Join concentrated sodium hydroxide solution for ruby red.

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