Except as provided in subsection (b), butyl nitrite shall be considered a banned hazardous product under section 2057 of this title.
For the purposes of section 2057 of this title, it shall not be unlawful for any person to manufacture for sale, offer for sale, distribute in commerce, or import into the United States butyl nitrite for any commercial purpose or any other purpose approved under the Federal Food, Drug, and Cosmetic Act [21 U.S.C. 301 et seq.].