of or made from or using substances produced by or used in reactions involving atomic or molecular changes
Chemical fertilizer.
source: WordNet 3.0
Pertaining to chemistry; characterized or produced by the forces and operations of chemistry; employed in the processes of chemistry; as, chemical changes; chemical combinations.
source: Webster 1913
noun
material produced by or used in a reaction involving changes in atoms or molecules
source: WordNet 3.0
A substance used for producing a chemical effect; a reagent.