dye|World dye variety

Name:C.I.Direct Brown 93,C.I.31860

Molecular Structure: trisazo class

C.I.Direct Brown 93,C.I.31860,CAS 6360-43-6,884.76,C34H23N8Na3O11S3,Corium Chrome Brown MRG

Molecular Formula:C₃₄H₂₃N₈Na₃O₁₁S₃

Molecular Weight: 884.76

CAS Registry Number:6360-43-6

Manufacturing Methods : 2,2′-Disulfo-4,4,diaminobibenzene double nitriding, first with phenol , and then in three alkaline conditions and 6-Amino-4-hydroxynaphthalene-2-sulfonic acid  coupling, product to diazo, and Benzene-1,3-diamine coupling.

Properties and Applications:  red light brown. Soluble in water for brown. The strong sulfuric acid in light color for palm red, red light brown after diluted precipitation. The dye solution to join strong hydrochloric acid have red light brown precipitation; Add thick sodium hydroxide solution is palm red light.

List of Suppliers:

Corium Chrome Brown MRG( Industria Chimica Dott  )