EXHIBIT 23(b) CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM The Board of Directors Solutia Inc.: We consent to the incorporation by reference in the registration statements (Nos. 333-34587, 333-34689, 333-34593, 333-34683, 333-51081, 333-74463, and 333-39972) on Form S-8 of Solutia Inc. and the registration statements (Nos. 333-75812, 333-89818, and 333-99705) on Form S-3 of Solutia Inc. of our report dated January 30, 2004, relating to the statement of operations, changes in members' equity/(deficit), and cash flows of Astaris LLC and subsidiaries for the year ended December 31, 2003, which report appears in the December 31, 2005 annual report on Form 10-K of Solutia Inc. /s/ KPMG LLP - ----------------------- KPMG LLP St. Louis, Missouri March 14, 2006