dye|World dye variety

Name:C.I.Direct Black 27,C.I.31810

Molecular Structure: trisazo class

C.I.Direct Black 27,C.I.31810,950.82,C38H25N8Na3O12S3,Dianil Black CR

Molecular Formula:C₃₈H₂₅N₈Na₃O₁₂S₃

Molecular Weight: 950.82

CAS Registry Number:

Manufacturing Methods : 4-(4-Aminophenyl)benzenamine double nitriding, first and 4,5-Dihydroxynaphthalene-2,7-disulfonic acid coupling, and then in alkaline conditions and 6-Amino-4-hydroxynaphthalene-2-sulfonic acid coupling, product to diazo, and Benzene-1,3-diamine coupling.

Properties and Applications: blue and black. Moderate soluble in water for hidden cyan, not soluble in alcohol. The strong sulfuric acid for Tracy in blue, diluted for dark purple. The dye solution to join strong hydrochloric acid have precipitation of dark; Add thick sodium hydroxide solution for purple.

List of Suppliers:

Dianil Black CR ( Farbwerke vorm. Meister Lucius &Brtining )