Which of the following is a common alcohol used as a coating solvent?

Ethanol is a common alcohol used as a coating solvent due to its effective solvent properties and ability to dissolve a variety of coatings, including paints and varnishes. It has a favorable evaporation rate that allows for a smooth application and finish. Ethanol is also relatively safe to work with, making it a popular choice in both industrial and residential applications. Additionally, its ability to mix well with water enhances its versatility in creating specific formulations, which is often required in artistic and industrial painting applications.

While other alcohols like butanol and methanol can also be used as solvents, they are generally less common in coating applications. Butanol has a higher molecular weight, resulting in a slower evaporation rate, which doesn't always produce the desired results in terms of drying time and finish consistency. Methanol, while a useful solvent in some contexts, is often avoided due to its toxicity and potential health hazards, which can limit its application in areas where safety is a priority. Hexanol is primarily used in specialty applications and is not typically employed as a general coating solvent.

Consequently, ethanol stands out as the most commonly used alcohol solvent in coatings, thanks to its balance of effectiveness, safety, and versatility in various coating formulations.