Is Acid Red 33 vegetarian?
Acid Red 33
D&C Red 33 is a red azo dye used as a colorant in mouthwashes, dentifrices, cosmetics, and hair dyes. It is the disodium salt of 5-amino-4-hydroxy-3-(phenylazo)-2,7-naphthalenedisulfonic acid. It is a fully synthetic compound approved for use in drug and cosmetic applications.
| Also known as | (CI 17200), Acid Red 33, Azo Fuchsine, D&C Red 33, Disodium 5-amino-4-hydroxy-3-(phenylazo)naphathlene-2,7-disulphonate (CI 17200), Disodium 5-amino-4-hydroxy-3-(phenylazo)naphathlene-2,7-disulphonate (see note 17), Disodium 5-amino-4-hydroxy-3-(phenylazo)naphthalene-2,7-disulphonate, Disodium 5-amino-4-hydroxy-3-(phenylazo)naphthalene-2,7-disulphonate (CI 17200), Disodium 5-amino-4-hydroxy-3-(phenylazo)naphthalene-2,7-disulphonate and its unsoluble barium, strontium and zirconium lakes, salts and pigments, Red 33 |
|---|---|
| INCI name | Acid Red 33 |
| CAS number | 3567-66-6 |
| EC number | 222-656-9 |
| CI number | CI 17200 |
| CosIng ID | 82173 |
| Last reviewed | 3 June 2026 |
An ingredient is considered vegetarian if it avoids components derived from killing an animal.
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