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Ponceau SX is an azo dye that was once used as a food coloring. It is a red monoazo organic pigment. While approved in some countries, such as Canada, it has been banned in the United States. The use of synthetic food dyes, including Ponceau SX, has been a subject of debate due to potential health effects, with different countries having varying regulations on their safety and approval.12

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2 Britannica Sources
  1. dye - Food dyes
  2. Double Ponceau R

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