Direct Blue 278
Name:C.I.Direct Blue 278,C.I.354561
Molecular Structure: Multi-azo class
Molecular Formula:C52H32N11Na5O17S5
Molecular Weight: 1358.15
CAS Registry Number:
Manufacturing Methods : 5-Amino-2-(4-aminophenylamino)benzenesulfonic acid double nitriding, and 5-Aminonaphthalene-2-sulfonic acid (2 Moore) coupled, then double nitriding, and 7-Amino-4-hydroxynaphthalene-2-sulfonic acid (2 Moore) coupled.
Properties and Applications: mainly used for paper shading.
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