Phenolphthalein is a color indicator used in acid/base titration. It has also been used as a laxative, but its over-the-counter uses had been withdrawn because of toxicological concerns over carcinogenicity. The metabolism of [ 14 C]-phenolphthalein was investigated in F344 rats and B6C3F1 ...
Phenolphthalein (Phthalin) is an acid-base indicator which is colorless in acid solution, but turns pink to red as the solution becomes alkaline. It is used medicinally as a cathartic. 别名 酚酞, Phthalin, Phthalimetten, Euchessina 化学信息 分子量 318.32 分子式 C20H14O4 CAS No. 77-09...
: a white or yellowish white compound used as a laxative and as an acid-base indicator because its solution is brilliant red in alkalies and clear in acids Medical Definition phenolphthalein noun phe·nol·phtha·lein ˌfēn-ᵊl-ˈthal-ē-ən -ˈthal-ˌēn -ˈ...
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 is a potent laxat...
In an acid-base titration, we use an acid and a base to find the concentration of the unknown solution. A titrant, which is a solution of known concentration, is added to an analyte. The analyte is a solution of unknown concentration. We can work out the concentration of the analyte by...
Noun1.phenolphthalein- 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 ...
英音[fi:nɔ:l'fθæli:n] ; 美音[fi:nɔ:l'fθæli:n] ; 名词 酚酞 英语解释 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 ...
The molecule found its first use as a pH indicator as it’s colourless in acids but turns bright purple-pink in alkaline solutions. If you’ve ever done an acid base titration experiment or used pH indicators in research then it’s likely that phenolphthalein was involved. It’s also used...
phenolphthalein[ ,fi:nɔl'fθæliin, -li:n ] n.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 ...
What is the Difference Between an Acid and a Base? Discussion Comments Byanon310850— On Dec 27, 2012 Is it the same exact powder used in laxatives as in the laboratory? Or are there ingredients added for lab use? All The Science, in your inbox ...