CAS Number 81-77-6 is the official registry number for Vat Blue 4 (Indanthrene Blue) (—, MW — g/mol). Available from verified Indian manufacturer with full documentation.
| CAS Number | 81-77-6 |
| Chemical Name | Vat Blue 4 (Indanthrene Blue) |
| Molecular Formula | — |
| Molecular Weight | — g/mol |
| Category | Dye & Pigment |
| Grade | Commercial Grade |
| HSN Code | 3204.15 |
Indanthrene Blue GCD · CI Vat Blue 4 · Anthracene vat blue
Cotton vat dyeing, Denim dyeing, Printing, Pigment printing
Textile, Denim, Chemical