dye|World dye variety

Name:C.I.Direct Orange 5,C.I.28650/23265

Molecular Structure: Double azo class

C.I.Direct Orange 5,C.I.28650/23265,721.61,C33H21N7Na2O8S,Pyramine Orange RF

Molecular Formula:C₃₃H₂₁N₇Na₂O₈S

Molecular Weight: 721.61

CAS Registry Number:

Manufacturing Methods : aniline diazo, and 7-(4-Aminobenzamido)-4-hydroxynaphthalene-2-sulfonic acid coupling, and then diazo, and 5-Oxo-1-phenyl-4,5-dihydro-1H-pyrazole-3-carboxylic acid coupling.

Properties and Applications: yellow orange. Moderate soluble in water for palm light orange, slightly soluble in alcohol. The strong sulfuric acid for orange red, to orange diluted. The dye solution to join strong hydrochloric acid have brown light orange precipitation; Add thick sodium hydroxide solution for orange brown. Can be used for cotton dyeing, good levelness. Neutral and alkaline white is very good. Hard to sensitive.

List of Suppliers:

Pyramine Orange RF( IG Farbenindustrie AG )