Former name for ninhydrin.
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tri·ke·to·hy·drin·dene hy·drate (tri-ke″to-hi-drinґdēn) chemical name: 1,2,3-indantrione monohydrate. A compound, C9H4O3·H2O, occurring as white to brownish white crystals or crystalline powder, used as a reagent. See under tests.Medical dictionary. 2011.