What does insolubility mean?
Insolubility is the state or quality of being insoluble, especially of being unable to dissolve in a liquid. The term is common in chemistry, materials science, environmental studies, and related technical fields, where the solubility of a substance in a particular solvent can affect how it behaves, how it is transported, and how safely it can be handled. For example, a chemical with low water insolubility may remain as a separate solid phase rather than dispersing through the water. The word can also be used figuratively for a dispute or problem that cannot readily be resolved. Its opposite is solubility. Insolubility is more formal and specialized than the simpler everyday expression “does not dissolve,” and it should not be used where no question of dissolving or breakdown is involved.
The quality or state of being insoluble, especially of being unable to dissolve in a liquid.
"Low temperatures can increase the insolubility of the mineral in the solution."
Usually used in technical or scientific contexts; “in” followed by the name of a solvent commonly specifies the liquid involved.
The inability of a dispute, problem, or arrangement to be resolved or broken down.
"The negotiations exposed the deep insolubility of the political conflict."
This is a relatively uncommon figurative use and should be reserved for persistent or apparently irresolvable situations.
Rare; the singular form is overwhelmingly preferred.
"The researchers compared the insolubilities of several polymer coatings."
Insolubility is the scientific opposite of solubility: while one describes a substance dissolving, the other describes its refusal to do so.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does insolubility come from?
Insolubility is formed from the Latin prefix insolubilis, meaning “not soluble” or “not able to be dissolved,” together with the noun-forming suffix -ity. Its vocabulary relatives include soluble, solubility, dissolve, and dissolution, all associated with the Latin root solvere, “to loosen” or “to solve.” The development of these English words reflects both their use in scientific description and the older figurative sense of resolving or settling a matter.
Related word forms
How insolubility is actually used
In scientific contexts, it usually refers specifically to a substance's inability to dissolve in a solvent. Its figurative use is less common and often conveys persistent difficulty or impossibility of resolution.