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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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英文字典中文字典相关资料:

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
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
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
Phenolphthalein | 77-09-8 - ChemicalBook
Phenolphthalein (CAS 77-09-8) information, including chemical properties, structure, melting point, boiling point, density, formula, molecular weight, uses, prices, suppliers, SDS and more, available at Chemicalbook
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
Where to Buy Phenolphthalein and Why It’s Hard to Find
Phenolphthalein is a white, crystalline organic compound used as an acid-base indicator in chemistry It is primarily used in laboratory settings for pH testing to detect changes in a solution’s acidity or alkalinity
Amazon. com: Phenolphthalein
Discover phenolphthalein products including solutions and powders Perfect for chemistry labs, titrations, and pH testing applications Browse options now
Phenolphthalein ACS reagent 77-09-8 - MilliporeSigma
Phenolphthalein is an indicator for acid-base titration reactions It changes from colorless to violet-red between pH 8 3-9 8, it is red in extremely acidic solutions, and colorless in extremely alkaline solutions

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