Definitions
from The Century Dictionary.
- noun A crystalline compound, C20H16O4, made by reducing phenolphthalein with zinc dust and caustic soda. It melts at 225° C. and is easily oxidized to phenolphthalein.
Etymologies
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Examples
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A bit of suspected blood is collected on a swab, and a drop of phenolphthalin reagent is added to the swab.
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