In Texas law, "Controlled Substance" is a term of art defined by various parts of the law, mainly the Health and Safety Code and the Penal Code. There are items that fall under other definitions, such as "Dangerous Drugs." Alcohol is one of those and is treated separately. It's not on any schedule that I know of, but it would be easy enough to double check by looking at the schedules in the HSC.
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Under the Statutes, alcohol is treated separate from CS listed in the Schedules.
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The answer is no. Alcohol is highly regulated, however. Look for regulation of the ethanol in the Alcoholic Beverage Code and the rules of the Texas Alcoholic Beverage Commission.