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Murexide
CIDE DICTIONARY
Murexide, n. [L. murex the purple fish, purple.].
A crystalline nitrogenous substance (C8H8N6O6 , 5-5'-nitrilodibarbituric acid monoammonium salt ) having a splendid dichroism, being green by reflected light and garnet-red by transmitted light. It was formerly used in dyeing calico, and was obtained in a large quantities from guano. It is now synthesized from alloxan. Formerly called also ammonium purpurate . [1913 Webster]
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