labile

adjective

1. apt or likely to change.
2. Chemistry. (of a compound) capable of changing state or becoming inactive when subjected to heat or radiation.

adjective

1. chem (of a compound) prone to chemical change
2. liable to change or move

adj.

1. Receptive to change; adaptable.
2. Constantly undergoing or likely to undergo change, as a chemical compound; unstable.