Direct Red 220
Name:C.I.Direct Red 220,C.I.29225
Molecular Structure: Double azo class
C.I.Direct Red 220,C.I.29225,CAS 15418-16-3,992.76,C33H20N6Na4O17S4
Molecular Formula:C33H20N6Na4O17S4
Molecular Weight: 992.76
CAS Registry Number:15418-16-3
Manufacturing Methods : 2 Moore 3-Amino-4-methoxybenzenesulfonic acid diazo, and N,N’-bis(4-hydroxy-2-sulfonaphthalene-7-yl)urea coupling, then ammoniacal copper sulfate solution, to convert it into copper complexes in the complexation of the two methoxy groups are replaced by hydroxyl groups..
Properties and Applications: blue and red to red light purple.
| Standard(cotton) | Acid Resistance | Alkali Resistance | Light Fastness | Soaping | Water | ||
| Fading | Stain | Fading | Stain | ||||
| ISO | 4-5 | 2-3 | 7 | 2-3(40℃) | 2-3 | 3-4 | 3-4 |
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