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Classification of Food Colours — Card 10 of 14
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Question
Which food additive is known to bleach anthocyanin pigments, resulting in loss of their red-purple color?
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Answer
B. Sulfur dioxide (SO₂)
Sulfur dioxide (SO₂) and sulfites (e.g., sodium sulfite, sodium metabisulfite, potassium metabisulfite) are commonly used as food preservatives and anti-browning agents. They react with the flavylium cation of anthocyanins to form colorless sulfonate complexes, causing a bleachin...
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