dye|World dye variety

Name:C.I.Direct Red 216,C.I.17815

Molecular Structure: Single azo class

C.I.Direct Red 216,C.I.17815,CAS 8004-49-7,512.51,C25H21N4NaO5S,Diaphtogene Scarlet PXP

Molecular Formula:C₂₅H₂₁N₄NaO₅S

Molecular Weight: 512.51

CAS Registry Number:8004-49-7

Manufacturing Methods : mixed N,N-dimethylaniline diazo, and 7-(4-Aminobenzamido)-4-hydroxynaphthalene-2-sulfonic acid coupling.

Properties and Applications:  colourful red yellow light. Soluble in water for orange red to red, soluble in ethanol is palm light orange. The strong sulfuric acid for product red to red light purple, diluted in red. The dye solution to join strong hydrochloric acid have red precipitate; With sodium hydroxide have orange brown precipitation.

List of Suppliers:

Diaphtogene Scarlet PXP( Industria Piemontese dei Colori di Anilina SpA )