What is the term for a water-soluble flammable liquid?

A water-soluble flammable liquid is referred to as a polar solvent. This term describes substances that can dissolve in water due to their molecular structure, which includes significant polar bonds that allow them to interact favorably with water molecules. Polar solvents are commonly used in various applications, including cleaning and industrial processes, but they also pose risks due to their flammability.

In contrast, hypergolic fuels are substances that ignite spontaneously upon contact with an oxidizer and typically do not necessarily have properties of being water-soluble. A solute is a general term for a substance that is dissolved in a solvent, yet it does not specifically address flammability or solubility with water. Miscible liquids are those that can mix completely in each other, but they do not specifically denote whether the liquids are flammable or water-soluble. Therefore, when identifying a term specifically for a water-soluble flammable liquid, polar solvent is the most accurate choice.