chemical substance
Defined in 1 dictionary — U.S. Code
United States Code
15 U.S.C. § 2602 — as used in this chapter (7 versions over time)
Except as provided in subparagraph (B), the term “chemical substance” means any organic or inorganic substance of a particular molecular identity, including—
(i) any combination of such substances occurring in whole or in part as a result of a chemical reaction or occurring in nature, and
(ii) any element or uncombined radical.