nonvolatile substance

Trimethylsilylation can also be used to increase the volatility of a compound, enabling gas chromatography of normally nonvolatile substances such as glucose.

The hindleg's tendon to the claw is swollen where it passes through the tibia into a spindle-shaped reservoir containing the pheromone, an oil-like, relatively nonvolatile substance.

Some solutions of volatile or nonvolatile substances are traditionally called spirits, regardless of whether obtained by distillation or not and whether or not they even contain alcohol.