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resorcinolphthalein

DEFINITIONS OF: resorcinolphthalein

1

n a yellow dye that is visible even when highly diluted; used as an absorption indicator when silver nitrate solution is added to sodium chloride in order to precipitate silver chloride (turns pink when no chloride ions are left in solution and negative fluorescein ions are then absorbed)

Synonyms:
fluorescein, fluoresceine, fluorescent dye
Types:
bromeosin, eosin
a red fluorescent dye resulting from the action of bromine on fluorescein; used in cosmetics and as a biological stain for studying cell structures
Type of:
absorption indicator
an indicator used in reactions that involve precipitation
dye, dyestuff
a usually soluble substance for staining or coloring e.g. fabrics or hair
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