Tyrian purple

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Tyrian purple (Ancient Greek: πορφύρα porphúra; Latin: purpura), also known as royal purple, imperial purple, imperial dye, or simply tyrian, is a reddish-purple natural dye. It is secreted by several species of predatory sea snails in the family Muricidae, rock snails originally known by the name murex (Bolinus brandaris, Hexaplex trunculus and Stramonita haemastoma). The coloured compound is 6,6'-dibromoindigo. The name Tyrian refers to the city of Tyre in ancient Phoenicia (modern-day Lebanon). In ancient times, extracting this dye involved tens of thousands of snails and substantial labour, and as a result the dye was costly to use and conferred a high social value on those whose clothing bore its color.

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