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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's common use is as an indicator in acid-base titrations It also serves as a component of universal indicator, together with methyl red, bromothymol blue, and thymol blue
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?
Explore phenolphthalein: the essential chemical indicator whose molecular structure visibly reveals changes in acid-base concentration for precise measurement
What Is Phenolphthalein? Properties, Uses, and Safety
Phenolphthalein serves as a fundamental acid-base indicator in titrations and qualitative analyses It is valued for its sharp color transition in the alkaline region, which helps analysts determine endpoint conditions accurately
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 | Magnificent molecules | RSC Education
The origins of phenolphthalein lie in the German chemical industry during the heyday of artificial dye discovery in the late 19th century
Phenolphthalein - Chemistry Online
What is phenolphthalein? Phenolphthalein (molecular formula C 20 H 14 O 4) is a pH indicator In acidic solutions it remains colorless, but in the presence of basic solutions it takes on a pinkish color with a turning point between pH = 8 0 (colorless) to pH = 9 8 (magenta or pinkish)
Phenolphthalein - NIST Chemistry WebBook
Grantscharova, E ; Avramov, I ; Gutzow, I , Thermodynamic behavior of amorphous and crystalline phenolphthalein, Dokl Bolg Akad Nauk, 1984, 37, 1521-1523 [all data]

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