See article: The Chemist’s War
The little told story of how the US government poisoned alcohol during Prohibition with deadly consequences.
“by the time Prohibition ended in 1933, the federal poisoning program, by some estimates, had killed at least 10,000 people”
“By mid-1927, the new denaturing formulas included some notable poisons—kerosene and brucine (a plant alkaloid closely related to strychnine), gasoline, benzene, cadmium, iodine, zinc, mercury salts, nicotine, ether, formaldehyde, chloroform, camphor, carbolic acid, quinine, and acetone. The Treasury Department also demanded more methyl alcohol be added—up to 10 percent of total product. It was the last that proved most deadly.”