purpurin

 
Pronunciation: /ˈpəːpjʊrɪn/

noun

[mass noun] Chemistry
  • a red dye originally extracted from madder and also prepared artificially by the oxidation of alizarin.
    • An anthraquinone derivative; chemical formula: C14H8O5

Origin:

mid 19th century: from Latin purpura 'purple' + -in1