Is Acid Blue 3 vegan?
Acid Blue 3
Vegan
Vegan
Vegetarian
Vegetarian
Patent Blue V is a synthetic triphenylmethane azo dye used as a blue food colourant and in cosmetics. It is produced via chemical synthesis from petroleum-derived precursors.
| Also known as | Acid Blue 3, Bis[hydrogen [4-[4-(diethylamino)-5'-hydroxy-2',4'-disulphonatobenzhydrylidene]cyclohexa-2,5-dien-1-ylidene]diethylammonium], calcium salt, Bis[hydrogen [4-[4-(diethylamino)-5'-hydroxy-2',4'-disulphonatobenzhydrylidene]cyclohexa-2,5-dien-1-ylidene]diethylammonium], calcium salt (CI 42051), CI 42051 /ACID BLUE 3, Erioglaucine disodium salt, Food Blue 5, Patent Blue V, Sky Blue, Sulphan Blue |
|---|---|
| INCI name | Acid Blue 3 |
| E number | E131 |
| INS number | 131 |
| CAS number | 3536-49-0 |
| EC number | 222-573-8 |
| CI number | CI 42051 |
| CosIng ID | 31610 |
| Last reviewed | 22 April 2026 |
An ingredient is considered vegan if it contains no animal-derived components at any point in its production.
Classifications are made to the best of our knowledge based on available scientific and regulatory sources. We cannot guarantee the accuracy of every entry, errors in the sources we draw from can always occur. This tool also cannot account for cross-contamination, which depends entirely on individual suppliers and producers. If you believe a classification is incorrect, you can report an issue.
