What makes rubbing alcohol thick?

Rubbing alcohol, primarily isopropyl alcohol or ethanol, typically has a low viscosity, but its thickness can be influenced by the concentration of alcohol and the presence of additives like glycerin or other thickening agents. Higher concentrations of alcohol can create a slightly thicker consistency due to decreased water content. Additionally, formulations designed for specific uses, such as hand sanitizers, often include thickening agents to improve texture and application.