title: Purpurin
text: # Purpurin
  
  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
  