Phenolphthalein - Wikipedia
网页Phenolphthalein (/ f ɛ ˈ n ɒ l (f) θ ə l iː n / [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.
酚酞 - 维基百科，自由的百科全书
网页酚酞（英語： phenolphthalein ）是一種化合物，分子式為C 20 H 14 O 4 ，常用“PP”、“HIn”、“HPh”、“phph”或“Ph”为速记符号。 酚酞通常用作 酸鹼指示劑 ，也曾作为刺激性 泻剂 。
Phenolphthalein | pH indicator, acid-base titration, indicator dye
网页2024年8月26日 · 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 laxative, which.
Phenolphthalein Indicator - Science Notes and Projects
网页2022年1月19日 · Phenolphthalein indicator is a pH indicator solution that is colorless under acidic and extremely alkaline conditions and fuchsia pink under ordinary alkaline conditions. Here is a look at the colors at different pH ranges, the chemistry of the color change, how to make phenolphthalein indicator, and uses of the chemical.
PHENOLPHTHALEIN中文(简体)翻译：剑桥词典 - Cambridge …
网页noun [ U ] chemistry specialized uk / ˌfiː.nɒlˈfθæl.iːn / us / ˌfiː.noʊlˈθæl.iːn / Add to word list. a substance that is colourless when it is mixed with an acid and pink or red when mixed with an alkali. 酚酞. (phenolphthalein在剑桥英语-中文（简体）词典的翻译 © Cambridge University Press) phenolphthalein的 例句.
Phenolphthalein | Magnificent molecules - RSC Education
网页2018年12月24日 · The origins of phenolphthalein lie in the German chemical industry during the heyday of artificial dye discovery in the late 19th century. An organic molecule made of only carbon, hydrogen and oxygen, it was first synthesised in 1871 by Adolf von Baeyer, who combined phenol and phthalic anhydride in the presence of …
酚酞 - 百度百科
网页酚酞属刺激剂，用于 慢性便秘，能直接刺激肠黏膜或活化肠内 平滑肌 的 神经末梢 而增加肠的推进力，因产生过度缓泻而导致体液与电解质障碍，长期使用可损害肠神经系统，且很可能是不可逆的。 2017年10月27日，世界卫生组织国际癌症研究机构公布的致癌物清单初步整理参考，酚酞在2B类致癌物清单中。 [5] 中文名. 酚酞. 外文名. Phenolphthalein [8] 化学式. C20H14O4. 分子量. 318.323. CAS登录号. 77-09-8. EINECS登录号. 201-004-7. 熔 点. …
Phenolphthalein | C20H14O4 | CID 4764 - PubChem
网页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 - NIST Chemistry WebBook
网页2013年9月5日 · Phenolphthalein. Formula: C 20 H 14 O 4. Molecular weight: 318.3228. IUPAC Standard InChI: InChI=1S/C20H14O4/c21-15-9-5-13 (6-10-15)20 (14-7-11-16 (22)12-8-14)18-4-2-1-3-17 (18)19 (23)24-20/h1-12,21-22H. Copy Sheet of …
酚酞_化工百科 - ChemBK
网页中文名:酚酞,英文名:Phenolphthalein,CAS:77-09-8,化学式:C20H14O4,分子量:318.32,密度:1.27 g/cm3 at 32 °C,熔点:261-263 °C (lit.),沸点:417.49°C (rough estimate),闪点:24°C,水溶性:<0.1 g/100 mL,蒸汽压:7.12E-13mmHg at 25°C,折射率:1.5400 (estimate),MSDS.