Direct Black 38, Direct Black Bn, Direct Black Brn, Direct Black Bx, Direct Black Ex, Direct Black Rn

Name:C.I.Direct Black 38,C.I.30235

Molecular Structure: trisazo class
 
C.I.Direct Black 38,C.I.30235,CAS 1937-37-7,781.73,C34H25N9Na2O7S2,Direct Black BN,Direct Black BRN,Direct Black BX,Direct Black EX,Direct Black RN

Molecular Formula:C34H25N9Na2O7S2

Molecular Weight: 781.73

CAS Registry Number:1937-37-7

Manufacturing Methods : 4-(4-Aminophenyl)benzenamine double nitriding, in acid conditions and 4-Amino-5-hydroxynaphthalene-2,7-disulfonic acid coupling, aniline diazo, in alkaline conditions and 4-Amino-5-hydroxynaphthalene-2,7-disulfonic acid group of adjacent a coupling, product again with Benzene-1,3-diamine coupling.
 
Used for cotton, viscose, silk, polyamide fiber and blending fabric, leather, wood, biological and plastic color, also used as the raw material of black ink.