Exhibit 12 OLIN CORPORATION AND CONSOLIDATED SUBSIDIARIES Computation of Ratio of Earnings to Fixed Charges (Unaudited) (In millions) Three Months Ended March 31, --------------------- 1999 1998(a) ------ ------- Earnings: Income from continuing operations before taxes $ 3.5 $ 34.9 Add (deduct): Equity in (loss) income of non-consolidated affiliates (2.5) 2.0 Interest capitalized, net of amortization (0.1) (0.1) Fixed charges as described below 6.3 8.0 ------ ------ Total $ 7.2 $ 44.8 ====== ====== Fixed Charges: Interest expense $ 3.8 $ 4.8 Estimated interest factor in rent expense 2.5 3.2 ------ ------ Total $ 6.3 $ 8.0 ====== ====== Ratio of earnings to fixed charges 1.1 5.5 === === - ---------------------------------------------------------- (a) Computation of ratio of earnings to fixed charges has been restated to reflect the spin-off of Arch Chemicals, Inc.