carbolic acid, phenol
酚 centers on a specific chemical compound: carbolic acid, also known as phenol. The two meanings refer to the same substance.
酚 is a modern coined character for chemical terminology. It combines 酉 (a container for liquids, often used in characters for organic compounds) with 分, which likely contributes the sound フン.
The left side 酉 suggests a liquid container, and the right side 分 hints at a fraction or component. Picture a bottle of a strong-smelling liquid used in early antiseptics: that's phenol.
For フン, imagine the strong smell of phenol making you say 'fun!' in a sarcastic tone: fun -> フン, as you handle the carbolic acid.
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