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Glite Dictionary
resorcinolphthalein

resorcinolphthalein

9.9
A yellow dye that turns pink to show when chloride is gone in a chemical test
  • noun
  • /ˌrɛzərˈsɪnəlˌfθeɪliːn/
  • Specialized
: resorcinolftaleína
  • As an indicator, resorcinolphthalein turns pink when chloride ions are no longer present in the solution.

Examples

  • The chemist used resorcinolphthalein to test for chloride ions.

  • Even at high dilution, resorcinolphthalein remains visible due to its intense yellow color.

  • The chemical laboratory stocked resorcinolphthalein for use in absorption indicator experiments.

  • Can you explain how resorcinolphthalein works?

  • resorcinolphthalein is used as a dye to indicate the absence of chloride ions in chemical solutions.

  • In titration experiments, resorcinolphthalein changes color to signal when chloride ions have been removed.

  • The lab technicians carefully mixed resorcinolphthalein with the sample to monitor chloride ion levels.

Surface Forms

resorcinolphthalein singular
resorcinolphthaleins plural

Morphology

resorcinolphthalein = resorcinol + phthalein (opaque) = resorcinol + phthalein

The term is a technical compound name combining two chemical names; its function as a specific indicator is specialized and not inferable by an average B1 learner from the components.

Etymology

Resorcinolphthalein is a name made by joining two chemical parts, resorcinol and phthalein, so it literally means the dye made from those parts. That's why resorcinolphthalein is a yellow dye used as an indicator that can turn pink when a test changes.