EXHIBIT 21 SUBSIDIARIES OF THE REGISTRANT The following is a list of Solutia's subsidiaries as of December 31, 2004, except for unnamed subsidiaries that, considered in the aggregate as a single subsidiary, would not constitute a significant subsidiary. Percentage of Voting Power Owned by Solutia ------------- AMCIS AG.........................................................100% CarboGen AG......................................................100% CPFilms Inc......................................................100% Monchem, Inc.....................................................100% Monchem International, Inc. .....................................100% Solchem Netherlands C.V..........................................100% Solutia Europe S.A./N.V..........................................100% Solutia Investments, LLC.........................................100% Solutia Netherlands Holdings B.V.................................100% Solutia Services International SCA/Comm, VA......................100% Solutia Systems, Inc.............................................100% Solutia U.K. Holdings Limited....................................100% Solutia U.K. Investments Limited.................................100% Solutia U.K. Limited.............................................100%