non-saturating solute

https://doi.org/10.1351/goldbook.15343
Solute which forms an unsaturated solution.
Note: Together with the term saturating solute used to distinguish among solutes in ternary and higher-order systems.
Source:
PAC, 2008, 80, 233. (Glossary of terms related to solubility (IUPAC Recommendations 2008)) on page 256 [Terms] [Paper]