dye|World dye variety

Name:C.I.Direct Violet 83,C.I.25280

Molecular Structure: Double azo class

C.I.Direct Violet 83,C.I.25280,CAS 6391-28-2,888.75,C33H23N8Na3O12S3,Formanil Violet RR

Molecular Formula:C₃₃H₂₃N₈Na₃O₁₂S₃

Molecular Weight: 888.75

CAS Registry Number:6391-28-2

Manufacturing Methods : 1,3-Bis(4-aminophenyl)urea double nitriding, in alkaline conditions and 7-Amino-4-hydroxynaphthalene-2-sulfonic acid coupling, in acid conditions and 4-Amino-5-hydroxynaphthalene-2,7-disulfonic acid coupling.

Properties and Applications:  bright purple. Soluble in water (for red light purple) and ethanol, easily soluble in soluble fiber element, insoluble in other organic solvents. The strong sulfuric acid for purple, dilute for dark blue purple solution after, precipitation. The dye solution to join 10% no change sulfuric acid; Add 10% sodium hydroxide solution for purplish red color.

List of Suppliers:

Formanil Violet RR( American Aniline Products Inc.  )