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 diphosphate was introduced by King 1 as a substrate for phosphatases. Huggins and Talalay 2 applied it to quantitative determinations of enzyme activities. They showed that the amount ...

Watch a simple but fascinating chemistry experiment using phenolphthalein and dry ice to demonstrate pH changes in real time. See how carbon dioxide forms acid in water and causes a dramatic color ...

When a small piece of sodium is placed in a petri dish with water and phenolphthalein, the sodium becomes a molten ball and darts around the dish, leaving a pink trail. The reactions of potassium, ...