Is Acid Blue 9 vegetarian?
Acid Blue 9
FD&C Blue 1, also known as Brilliant Blue FCF, is a synthetic triarylmethane dye certified by the FDA for use in food, drugs, and cosmetics. It is produced from coal tar or petroleum derivatives and imparts a bright blue colour.
| Also known as | 37307-56-5, Acid blue 9, Acid Blue 9 Ammonium Salt, Acid Blue Acid Blue 9 Ammonium salt, Benzenemethanaminium, N-ethyl-N-[4-[[4-[ethyl-[(3-sulfophenyl)-methyl]-amino]-phenyl](2-sulfophenyl)methylene]-2,5-cyclohexadien-1-ylidene]-3-sulfo, inner salts, disodium salt and its ammonium and aluminium salts (15), Blue 1, Brilliant Blue FCF, CI 42090., CI 42090. (see note 17), CI 42090/ ACID BLUE 9, CI Food Blue 2, CIFood Blue 2, Dihydrogen (ethyl)[4-[4-[ethyl(3-sulphonatobenzyl)]amino]-2'-sulphonatobenzhydrylidene]cyclohexa-2,5-dien-1-ylidene](3-sulphonatobenzyl)ammonium, disodium salt, Dihydrogen (ethyl)[4-[4-[ethyl(3-sulphonatobenzyl)]amino]-2'-sulphonatobenzhydrylidene]cyclohexa-2,5-dien-1-ylidene](3-sulphonatobenzyl)ammonium, disodium salt (CI 42090), Erioglaucine, FD&C Blue 1, FD&C Blue No. 1, Food blue 2, N-Ethyl-N-[4-[[4-[ethyl(3-sulfophenyl)methylamino]phenyl](2-sulfophenyl)methylen)-2,5-cyclohexadien-1-yliden]-3-sulfobenzolmethanaminium-Innensalz, Ammoniumsalz, N-Ethyl-N-[4-[[4-[ethyl(3-sulfophenyl)methylamino]phenyl](2-sulfophenyl)methylene)-2,5-cyclohexadien-1-ylidene]-3-sulfobenzenemethanaminium inner salt, ammonium salt, N-Ethyl-N-[4-[[4-[ethyl(3-sulfophenyl)methylamino]phenyl](2-sulfophenyl)methylene)-2,5-cyclohexadien-1-ylidene]-3-sulfobenzenemethanaminium inner salt, ammonium salt (CI 42090), Patent Blue |
|---|---|
| INCI name | Acid Blue 9 |
| E number | E133 |
| INS number | 133 |
| CAS number | 3844-45-9 |
| EC number | 223-339-8 |
| CI number | CI 42090 |
| CosIng ID | 87684 |
| Last reviewed | 16 April 2026 |
An ingredient is considered vegetarian if it avoids components derived from killing an animal.
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