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Tartrazine (Yellow No. 5) (C₁₆H₉N₄NaO₉S₂) — Properties, Uses & Safety

🍎 Food Chemistry & Flavor

Overview

FD&C Yellow No. 5 — a widely used synthetic food dye in candies, sodas, and snack foods; controversial for hyperactivity claims.

IUPAC Name: 5-hydroxy-1-(4-sulfophenyl)-4-[(E)-(4-sulfophenyl)diazenyl]-1H-pyrazole-3-carboxylic acid
CAS Number: 1934-21-0
PubChem CID: 164825
Molecular Formula: C₁₆H₉N₄NaO₉S₂
Molar Mass: 534.363 g/mol
State at STP: solid
Appearance: Orange-yellow powder

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