Vat Blue 7
Name:C.I.Vat Blue 7,C.I.70305
Molecular Structure: Indigo class
C.I.Vat Blue 7,C.I.70305,CAS 6505-58-4,544.64,C36H16O2S2
Molecular Formula:C36H16O2S2
Molecular Weight: 544.64
CAS Registry Number:6505-58-4
Manufacturing Methods : Chloroacetic acid and 3-Mercapto-7H-benzo[de]anthracen-7-one condensation, then use Potassium hydroxide melting, and oxidation.
Properties and Applications: deep green light blue. Insoluble in Etanol, Pyridine and Xylene. In concentrated sulfuric acid for red black, dilution after blue precipitation; In the basic insurance powder solution for blue purple; In the acidic insurance powder solution for blue light red.
| Standard | Ironing Fastness | Chlorine bleach | Light Fastness | Mercerized | Oxygen bleach | Soaping | |
| Fading | Stain | ||||||
| ISO | 4 | 4 | 6-7 | 4 | 3-4 | 4-5 | 5 |
| AATCC | 5 | 4 | 6-7 | 4 | 4 | ||
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