What does it mean if a substance is described as insoluble?

When a substance is described as insoluble, it means that it does not dissolve in a liquid, most commonly water. This property is significant in various contexts, particularly in chemistry and environmental science, including the use of pesticides. Understanding solubility is crucial when considering how a chemical interacts with its environment, such as whether it will remain in the soil, bind to particles, or enter waterways.

For instance, pesticides that are insoluble may be less likely to leach into groundwater, making them a preferred choice in certain agricultural settings. Conversely, the solubility of a substance influences its effectiveness, application methods, and environmental impact. Therefore, recognizing that insoluble substances do not dissolve in a liquid helps clarify their behavior and potential implications in various scenarios.