Direct Blue 133
Name:C.I.Direct Blue 133,C.I.34005
Molecular Structure: trisazo class
C.I.Direct Blue 133,C.I.34005,CAS 8006-04-0,889.82,C38H26N7Na3O9S3,Nephthogene Blue 4R
Molecular Formula:C38H26N7Na3O9S3
Molecular Weight: 889.82
CAS Registry Number:8006-04-0
Manufacturing Methods : 3-Aminonaphthalene-1,5-disulfonic acid diazo, and Naphthalen-1-amine coupling, product to diazo, and 5-Aminonaphthalene-2-sulfonic acid and 8-Aminonaphthalene-2-sulfonic acid coupling, again diazo, and 2,5-Dimethylbenzenamine coupling.
Properties and Applications: dark red light to dark purple light blue. Soluble in water for red light purple and blue, slightly soluble in alcohol. The strong sulfuric acid in the green light for black, diluted Dark violet color to brown for precipitation. The dye solution to join sulfuric acid 10% tiny change of blue; Add 10% sodium hydroxide solution for red light purple.
| Standard | Acid Resistance | Alkali Resistance | Light Fastness | Soaping | Water | ||
| Fading | Stain | Fading | Stain | ||||
| ISO | 4-5 | 4-5 | 4-5 | 4 | 4-5 | ||
| AATCC | 5 | 5 | 5 | 3 | 5 | ||
List of Suppliers:
Nephthogene Blue 4R( Aktiengesellschaft für Anilin-Fabrikation )