Chloroform (Inhalational Anesthetic): Chloroform is a potent general anesthetic agent. When inhaled, it depresses the central nervous system to induce true general anesthesia—meaning it can cause total unconsciousness, amnesia, and surgical insensitivity to pain if administered in sufficient concentrations. However, it is obsolete and dangerously toxic (causing severe liver damage and fatal heart arrhythmias) and is no longer used in medicine

Interesting. Gemini also told me that chloroform would be a bad choice to use on its own to execute someone due to:

• Unreliability: Fatal doses of chloroform vary significantly from person to person. This unpredictability makes it highly unreliable for a standardized execution protocol.
• Severe Physical Distress: Before causing unconsciousness or death, chloroform inhalation frequently causes severe irritation to the respiratory tract, violent coughing, choking, and a feeling of suffocation.
• Organ Toxicity: It causes severe, painful damage to the liver and kidneys, as well as cardiac arrhythmias (irregular heartbeats) before death occurs.

At this point, I'll leave medical conjectures about methods of execution to the experts, whoever those may be. 😉

Ok, maybe one last useless question of mine answered:

​No, aerosolized propofol is not used, nor is it a viable method of capital punishment. Propofol is strictly an intravenous (IV) sedative-hypnotic agent formulated as an oil-in-water emulsion. It cannot be effectively or humanely delivered through the lungs to induce death. While the state of Missouri briefly considered using intravenous propofol for a single-drug lethal injection protocol in 2012, the plan was abandoned after the primary European manufacturer, Fresenius Kabi, threatened to halt all exports to the United States. This would have triggered a severe domestic shortage for hospital surgeries.