Is Vat Blue 1 vegetarian?
Vat Blue 1
CI 73000 is an indigoid colourant, the compound commonly known as indigo, chemically 2-(1,3-dihydro-3-oxo-2H-indazol-2-ylidene)-1,2-dihydro-3H-indol-3-one. It can be produced synthetically or extracted from plants such as Indigofera species.
| Also known as | 2-(1,3-Dihydro-3-oxo-2H-indazol-2-ylidene)-1,2-dihydro-3H-indol-3-one, Indigo, Indigo Blue |
|---|---|
| INCI name | Vat Blue 1 |
| CAS number | 482-89-3 |
| EC number | 207-586-9 |
| CI number | CI 73000 |
| CosIng ID | 32792 |
| Last reviewed | 9 July 2026 |
An ingredient is considered vegetarian if it avoids components derived from killing an animal.
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