Pyrido phenoxazines

Campagne, W. V. L., Use Ponchon-Savarit in Your Process Simulation, Part 1, Hydro. PToc. V. 72, No. 9 (1993), p. 41.  [c.227]

The magnificent purple pigment referred to in the Bible and known to the Romans as Tyrian purple after the Phoenician port of Tyre (Lebanon), was shown by P. Friedlander in 1909 to be 6,6 -dibromoindigo. This precious dye was extracted in the early days from the small purple snail Murex brandaris, as many as 12000 snails being required to prepare 1.5 g of dye. The element itself was isolated by A.-J. Balard in 1826 from the mother liquors remaining after the crystallization of sodium chloride and sulfate from the waters of the Montpellier salt marshes  [c.793]

See pages that mention the term Pyrido phenoxazines : [c.14]    [c.1112]   
Advances in heterocyclic chemistry Vol.85 (2003) -- [ c.83 , c.214 ]