Which anesthetic gas is commonly known for its recreational use?

The anesthetic gas commonly known for its recreational use is ether. Ether is a volatile organic compound that has historically been used as an anesthetic in medical settings. However, due to its psychoactive effects, it has also been misused for recreational purposes. The inhalation of ether can create euphoric sensations and a feeling of intoxication, which has attracted individuals seeking a high. This risky practice can lead to serious health consequences, including respiratory problems and potential overdose.

In contrast, aerosol and glue are not anesthetic gases but are often misused for their solvent properties, leading to inhalant abuse. Freon, on the other hand, is a refrigerant gas that can also be misused but is not typically classified as an anesthetic. Therefore, ether stands out as the correct answer due to its specific historical use as an anesthetic that has also been adopted in recreational contexts.