About
酞 is formed by the semantic radical 酉 (alcohol, fermentation, chemical processes) and the phonetic component 太 on the right. It has no classical origins; it was deliberately coined in the modern period to translate Western organic chemistry terms into Chinese. The character is used exclusively in scientific contexts to represent the chemical suffix 'phthalein,' as in the indicator phenolphthalein, with the 酉 radical classifying it among organic chemical compounds.
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