Vat Blue 25
Name:C.I.Vat Blue 25,C.I.70500
Molecular Structure: anthrone class
C.I.Vat Blue 25,C.I.70500,CAS 6247-39-8,446.46,C31H14N2O2
Molecular Formula:C31H14N2O2
Molecular Weight: 446.46
CAS Registry Number:6247-39-8
Manufacturing Methods : 3-Bromo-6aH-benzo[de]anthracen-7(8H)-one and 3H-naphtho[2,3-f]indazol-3-one condensation, the product with Etanol/Potassium hydroxide melt.
Properties and Applications: red light blue to red light navy blue. Dark blue powder. In concentrated sulfuric acid to blue light red. Alkaline reduction leuco for green light blue; Acid reduction leuco for purple. To cotton directness high, good levelness. Used for cotton fiber dyeing for red light blue to red light navy blue, also can be used for cotton fabric direct printing, resist printing and discharge printing, but also can be used for viscose and silk dyeing.
| Standard | Ironing Fastness | Chlorine bleach | Light Fastness | Mercerized | Oxygen bleach | Soaping | |
| Fading | Stain | ||||||
| ISO | 4 | 4-5 | 7 | 4 | 4 | 4 | 5 |
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