Ponceau 4R
The short version
A bright strawberry-red azo dye used in desserts, fillings, and glace cherries.
A synthetic red dye (Ponceau 4R). It's approved in the EU but not the US, and it's part of the group of colours linked to hyperactivity that must carry a warning label. That's why we flag it.
Where it comes from
An azo dye developed in the late 19th century. Synthesized from sulphonated naphthalene precursors, yielding a bright strawberry-red water-soluble dye.
How it's used
Used in desserts, dessert mixes, fillings, glace cherries, and red-colored beverages. Typical use 50–150 mg/kg.
Safety profile
ADI of 0.7 mg/kg body weight — among the strictest of the azo dyes. Part of the Southampton six requiring the EU hyperactivity warning. Linked to adverse reactions in sulfite- and aspirin-sensitive individuals.
Physical & chemical properties
Bright red crystalline powder, very soluble in water. Stable to light and heat in acidic and neutral conditions. Degraded by strong reducing agents.
Regulation worldwide
Permitted in the EU with the Southampton warning. Banned in the US, Canada, and Norway. Subject to a low EU ADI compared to other azo dyes.
Educational information only. Not medical or dietary advice.