Definitions

from The Century Dictionary.

  • noun The purpurate of ammonia of Prout (probably C8H8N6O6).

from the GNU version of the Collaborative International Dictionary of English.

  • noun (Chem.) 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.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun organic chemistry Ammonium purpurate, the ammonium salt of purpuric acid, used as a complexometric indicator and a colorimetric reagent.

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