nonelectrolyte

This term is a technical classification used primarily in chemistry to distinguish substances that remain molecularly intact in solution from electrolytes, which break into ions. It carries a neutral, scientific connotation and is used almost exclusively in academic, laboratory, or medical contexts to describe the electrical properties of a solute.

As a mass noun in many chemical contexts, it often refers to the general category of substances. However, when referring to specific types of chemicals that fit this description, it functions as a standard countable noun.