Phenolphthalein

Pronunciation: /ˌfiːnɒlˈθeɪliːn/

Definitions of phenolphthalein

noun a chemical compound commonly used as an acid-base indicator in titrations

Example Sentences

A1 I have never heard of phenolphthalein before.

A2 The science teacher used phenolphthalein in the experiment.

B1 The lab technician added a few drops of phenolphthalein to the solution.

B2 The chemical compound phenolphthalein is commonly used as a pH indicator.

C1 Researchers are investigating the potential applications of phenolphthalein in medicine.

C2 The synthesis of phenolphthalein requires precise control of reaction conditions.

Examples of phenolphthalein in a Sentence

formal The presence of phenolphthalein in the solution indicates a pH of 8 or higher.

informal Make sure to add a few drops of phenolphthalein to see the color change.

slang I always use that pink stuff, phenolphthalein, to test for acidity.

figurative Her mood shifted as quickly as phenolphthalein changes color in a basic solution.

Grammatical Forms of phenolphthalein

• plural: phenolphthaleins
• comparative: more phenolphthalein
• superlative: most phenolphthalein
• present tense: phenolphthaleins
• future tense: will phenolphthalein
• perfect tense: have phenolphthaleined
• continuous tense: is phenolphthaleining
• singular: phenolphthalein
• positive degree: phenolphthalein
• infinitive: to phenolphthalein
• gerund: phenolphthaleining
• participle: phenolphthaleined

Origin and Evolution of phenolphthalein

First Known Use: 1901 year

Language of Origin: English

Story behind the word: The word 'phenolphthalein' originates from a combination of 'phenol' and 'phthalein'. Phenol is a chemical compound derived from benzene, while phthalein refers to a class of chemical compounds.

Evolution of the word: Originally used as a chemical indicator in acid-base titrations, phenolphthalein has evolved to also be used in medical and biological research as well as in the production of plastics and dyes.