unreactive

Synonyms

inactive

(chemistry) not participating in a chemical reaction; chemically inert

indifferent, inert, neutral

having only a limited ability to react chemically; chemically inactive

noble

inert especially toward oxygen

stable

not taking part readily in chemical change

Antonyms:

reactive

participating readily in reactions

activated, excited

(of e.g. a molecule) made reactive or more reactive

labile

(chemistry, physics, biology) readily undergoing change or breakdown

oxidizable

capable of undergoing a chemical reaction with oxygen

thermolabile

(chemistry, physics, biology) readily changed or destroyed by heat

unstable

highly or violently reactive

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