A staff member of a pharmaceutical company assesses the quality of a medical product in Nanjing, east China's Jiangsu Province, June 24, 2019. (Xinhua/Ji Chunpeng) China's National Medical Products ...
Phenolphthalein, 3,3-Bis-(4-hydroxyphenyl)-phthalid, das Lacton der nicht isolierbaren 4',4′′,α-Trihydroxytriphenylmethan-2-carbonsäure. P. bildet farblose, geruchlose Kristalle; F. 262 bis 263 °C. Es ...
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