Why do plastic containers become orange-stained when they come in contact with hot tomato sauce?

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Why do plastic containers become orange-stained when they come in contact with hot tomato sauce?

In: Chemistry

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Tomatoes contain a lot of lycopene, a bright orange substance that stains. The lycopene sticks very well to the plastic, causing it to stain. A little bleach and water can help oxidise and remove the stain.

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