unreactive

unreactive

(ˌʌnrɪˈæktɪv) adj (Chemistry) (of a substance) not readily partaking in chemical reactions

Thesaurus

Adj.	1.	unreactive - (chemistry) not reacting chemicallychemical science, chemistry - the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactionsnatural philosophy, physics - the science of matter and energy and their interactions; "his favorite subject was physics"reactive - participating readily in reactions; "sodium is a reactive metal"; "free radicals are very reactive"
	2.	unreactive - not tending to react to stimulationinsensitive - not responsive to physical stimuli; "insensitive to radiation"