Mordant Blue 81
Name:C.I.Mordant Blue 81,C.I.16645
Molecular Structure: Single azo class
C.I.Mordant Blue 81,C.I.16645,CAS 5850-64-6,620.48,C20H11N2Na3O11S3,Chromotrope F4B
Molecular Formula:C20H11N2Na3O11S3
Molecular Weight: 620.48
CAS Registry Number:5850-64-6
Manufacturing Methods : 4-Aminonaphthalene-1-sulfonic acid diazotization, and 4,5-Dihydroxynaphthalene-2,7-disulfonic acid coupling.
Properties and Applications: blue black. Soluble in water for product red, slightly soluble in ethanol for pink. In concentrated sulfuric acid for blue, dilution after pink. Dye aqueous solution to join concentrated hydrochloric acid for magenta; Join concentrated sodium hydroxide solution for purple.
| Standard | Ironing Fastness | Light Fastness | Fulling | Persperation Fastness | Soaping | Water | |
| Alkali | Acid | ||||||
| ISO | 6 | 3 | 4 | 2-3 | |||
List of Suppliers:
Chromotrope F4B( Rohner Ltd )