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.
| Standard | Acid Resistance | Alkali Resistance | Light Fastness | Soaping | Water |
| Fading | Stain | Fading | Stain |
| ISO | 3 | 3 | 3 | 2 |
| 2-3 |
|
| AATCC | 3 | 3 | 4-5 | 3 |
| 2 |
|