Meaning of “chemical” - Learner’s Dictionary

chemical

noun [ C ] us uk /ˈkemɪkəl/
Extra Examples
harsh chemicalshazardous chemicalsWe are looking at how these chemicals interact.Dangerous chemicals were accidentally released into the river.The company was fined for illegally dumping toxic chemicals.

B2 a basic substance that is used in chemistry or produced by chemistry

(Definition of “chemical noun” from the Cambridge Learner’s Dictionary © Cambridge University Press)