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phenolphthalein 音标拼音: [f,inɑlfθ'elən] [f,ɛnɑlfθ'elən]

n. 酚酞

酚□

WordNet (r) 3.0 (2006) (WordNet)

phenolphthalein
n 1: a laxative used in many preparations under various trade
names; also used as an acid-base indicator in titrations
involving weak acids and strong bases because it is
brilliant red at high alkalinity and colorless below pH 8

The Collaborative International Dictionary of English v.0.48 (gcide)

Phenolphthalein \Phe`nol*phthal"e*in\, or Phenol phthalein
\Phenol phthalein\, n. (Chem.)
A white or yellowish white crystalline substance, {C20H14O4},
formed by condensation of the anhydride of phthalic acid and
phenol. Its solution in alkalies is brilliant red, but is
decolorized by acids. This reaction, being very delicate, is
used as a pH indicator. It is sometimes used as a laxative in
veterinary medicine.
[Webster 1913 Suppl. PJC]

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Phenolphthalein - Wikipedia
Phenolphthalein ( fɛˈnɒl (f) θəliːn [citation needed] feh-NOL (F)-thə-leen) is a chemical compound with the formula C 20 H 14 O 4 and is often written as " HIn ", " HPh ", " phph " or simply " Ph " in shorthand notation Phenolphthalein is often used as an indicator in acid–base titrations For this application, it turns colorless in acidic solutions and pink in basic solutions It
Phenolphthalein Indicator - Science Notes and Projects
Learn about phenolphthalein indicator, including its structure, how to make it, and what colors it turns at various pH values
Phenolphthalein | C20H14O4 | CID 4764 - PubChem
Phenolphthalein | C20H14O4 | CID 4764 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety hazards toxicity information, supplier lists, and more
Phenolphthalein | pH indicator, acid-base titration, indicator dye . . .
Phenolphthalein, (C20H14O4), an organic compound of the phthalein family that is widely employed as an acid-base indicator As an indicator of a solution’s pH, phenolphthalein is colourless below pH 8 5 and attains a pink to deep red hue above pH 9 0
What Is Phenolphthalein Indicator and How Does It Work?
Phenolphthalein is valuable in titrations involving a strong base and a weak acid, or sometimes a strong acid and a strong base The completion point, known as the equivalence point, is when the titrant perfectly neutralizes the substance
What Is Phenolphthalein? Properties, Uses, and Safety
Autech Industry supplies high-quality Phenolphthalein powder for laboratory and industrial use Learn what Phenolphthalein is, its chemical formula, properties, indicator mechanism, applications, and MSDS safety information
Phenolphthalein | Magnificent molecules | RSC Education
Painting on a solution of phenolphthalein is an easy way to check for the extent of carbonation inside a concrete slab: pink areas are alkaline and uncarbonated while carbonated areas will remain unstained, suggesting there is a problem
Phenolphthalein - an overview | ScienceDirect Topics
Phenolphthalein is defined as a yellowish powder that is soluble in alcohol and alkaline solutions, but only slightly soluble in water, exhibiting a colorless form in acidic solutions and red or pink in alkaline conditions
Phenolphthalein - Uses, Dosage, Side Effects, and Precautions
Learn about Phenolphthalein, including its uses as a pH indicator and laxative, recommended dosage, potential side effects, and special precautions Find out about drug interactions and more
Phenolphthalein - NIST Chemistry WebBook
In addition to the Thermodynamics Research Center (TRC) data available from this site, much more physical and chemical property data is available from the following TRC products: SRD 103a – Thermo Data Engine (TDE) for pure compounds SRD 103b – Thermo Data Engine (TDE) for pure compounds, binary mixtures and chemical reactions SRD 202 – Web Thermo Tables (WTT), "lite" edition SRD 203

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