Multiple choice

Which of the following dyes is also known as verantin?

  1. Purpurin

  2. Carminic acid

  3. 1, 4-Diamino-2, 3-dihydroanthraquinone

  4. 1, 3-Dihydroxyanthraquinone

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A Correct answer
Explanation

The purpurin, is a naturally occurring red/yellow dye. It is an organic compound formally derived from anthraquinone by replacement of three hydrogen atoms by hydroxyl (OH) groups. Purpurin is also called verantin. It is a minor component of the classical lake pigment madder lake or Rose Madder.