nonvolatile component; nonvolatile constituent
Chemistry term for a substance that does not readily evaporate under normal conditions. Often contrasted with 揮発成分 (volatile component).
See also: 揮発成分
The nonvolatile content of this paint is about 60%.
The sample was heated to analyze the nonvolatile components.
揮発成分 refers to volatile components that evaporate easily, while 不揮発成分 refers to the nonvolatile fraction that remains.
Compound of 不 (non-), 揮発 (volatilization), and 成分 (component). A straightforward technical term formed from standard Sino-Japanese morphemes.