Chemical Warfare is the second studio album by American rapper and producer The Alchemist. The album was released on July 7, 2009.
The Alchemist recorded material for the album with Evidence, Fabolous, Mobb Deep, Dilated Peoples, Kool G Rap, Pusha T, Jadakiss, KRS-One, Snoop Dogg, Twista, Maxwell, Three 6 Mafia, Juvenile and Eminem. The first song released from the album was "Keys to the City", which features Prodigy and Nina Sky. Alchemist leaked the song himself in 2007. A video for the song, produced, shot, edited and directed by The Alchemist, was released on July 28, 2008. The first official single announced was "Lose Your Life" featuring Jadakiss, Snoop Dogg & Pusha T. The official video for "Smile", featuring Maxwell and Twista, was released on June 11, 2009.