Purpurin or purpurine may refer to:
- 1,2,4-Trihydroxyanthraquinone, a natural red/yellow dye found in the madder plant
- Purpurin (protein), a protein, belonging to the lipocalin family
- Purpurin (glass), a red or reddish-brown ancient type of glass
- Purpurine, an earlier, but still occasionally seen, name for uroerythrin, the pink/red precipitate from urine
This disambiguation page lists articles associated with the title Purpurin.
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