1. (noun) a chemical is a either a chemical element or a matter with a distinguished composition of such elements. (see also molecule) the term is often used to refer to bulk material, rather than to individual microscopic or submicroscopic particles, ie, a chemical is a specific collection of atoms or molecules.
3. (adjective) Of or relating to chemistry
Does chemicals include mining?
Should def 2 be moved to "chemical industry" or something like that? The idea with having this sort of an entry is to have a target to link to from descriptions of a nation's economy, such as Gabon/Economy.