dye|World dye variety

Name:C.I.Direct Red 122,C.I.29210

Molecular Structure: Double azo class

C.I.Direct Red 122,C.I.29210,CAS 6420-46-8,786.7,C33H24N8Na2O9S2

Molecular Formula:C₃₃H₂₄N₈Na₂O₉S₂

Molecular Weight: 786.7

CAS Registry Number:6420-46-8

Manufacturing Methods : N-(3-aminophenyl)formamide (2 Moore) diazo, and N,N’-bis(4-hydroxy-2-sulfonaphthalene-7-yl)urea coupling, and then hydrolysis formex amino.

Properties and Applications: red. Soluble in water for red, slightly soluble in alcohol for Shallow red brown, insoluble in other organic solvents. The strong sulfuric acid for quality in red, with golden yellow to orange after diluted, orange precipitation; In nitric acid for red brown, then to yellow. The dye solution to join strong hydrochloric acid have brown light orange precipitation; Add thick sodium hydroxide solution for orange brown.

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