Dilutable

Dilutable describes a substance or solution that can be diluted by the addition of a solvent to achieve a lower concentration. In chemical terms, the solute does not undergo permanent chemical change during dilution; rather, its molecules become more dispersed in a larger volume of solvent.

Commonly, dilution follows the relation C1V1 = C2V2, where C is concentration and V is volume. This concept underpins the use of stock solutions and concentrates in laboratories, medicine, cleaning products, and industrial formulations. A dilutable product is typically labeled with a recommended dilution ratio to reach a target strength or volume.

Not all substances are readily dilutable. Some compounds react with the solvent, decompose, precipitate, or polymerize when diluted, and there are safety concerns with exothermic dilution of concentrated acids or oxidizers. Therefore, manufacturers specify diluent type, final concentration, and procedures, and users should follow these instructions.

Examples include concentrated cleaning agents, laboratory stock solutions, pesticides, and paints sold as concentrates. In nutritional or pharmaceutical contexts, dilutability allows dosing with precise volumes, while ensuring stability and efficacy of the active ingredient when diluted.

See also: dilution, concentration, solubility, stock solution. Etymology: from Latin dilūtus.