dye|World dye variety

Name:C.I.Direct Yellow 67,C.I.29080

Molecular Structure: Double azo class

C.I.Direct Yellow 67,C.I.29080,CAS 6420-34-4,742.69,C29H28N8Na2O9S2,Para Yellow R

Molecular Formula:C₂₉H₂₈N₈Na₂O₉S₂

Molecular Weight: 742.69

CAS Registry Number:6420-34-4

Manufacturing Methods : 2-Amino-4-formamidobenzenesulfonic acid diazo, and 2-Amino-4-methylanisole coupling, and then with water and light acyl gasification.

Properties and Applications: yellow. Moderate soluble in water for gold orange, slightly soluble in ethanol for yellow. The strong sulfuric acid in blue, diluted light gray for subtle stitching. The dye solution to join strong hydrochloric acid for dark brown precipitation; Add thick sodium hydroxide colour and lustre is no change.

List of Suppliers:

Para Yellow R( Bayer Group )