Rule 424(b)(3) Pricing Supplement: Number 11 May 7, 1999 File No. 33-53327 (To Prospectus dated May 25, 1994, and Prospectus Supplement dated June 15, 1995) E. I. du Pont de Nemours and Company Medium-Term Notes, Series G - ------------------------------------------------------------------------------ CUSIP: 26353LHR5 Original Issue Date: 5/18/1999 Form: Book-Entry Maturity Date: 5/18/2039 Principal Amount: $25,000,000 Interest Rate Formula: 3-Month USD LIBOR per Telerate Page 3750 minus 0.29% Issue Price: 100.00% Interest Reset and Payment Dates: - ------------------------------------------------------------------------------ Interest reset and payments are quarterly on the 18th May, August, November and February of each year beginning on August 18, 1999 and as per the conditions further provided in the Prospectus Supplement dated June 15, 1995. Interest Reset Determination Date is two New York Business Days prior to reset. Redemption at DuPont's Option: - ------------------------------------------------------------------------------ The Notes cannot be redeemed prior to the Maturity Date. Repayment at the Option of the Holder: - ------------------------------------------------------------------------------ The holder of the Notes may elect to cause DuPont to repurchase the Notes, in whole or in part, under the conditions provided in the Prospectus Supplement dated June 15, 1995, on May 18th of each of the years set forth below, at the amounts set forth below (expressed as percentages of the principal amount of the Notes) corresponding to the years set forth below, together with any accrued interest to the Repurchase Date: Repurchase Date Repurchase Price 5/18 2009 99.00% 5/18 2012 99.25% 5/18 2015 99.50% 5/18 2018 99.75% 5/18 2021 100.00% Puttable at Par every three years thereafter until maturity. Discount Note: No Agent's Commission: 1.00% Agent: Morgan Stanley Dean Witter Calculation Agent: Chase Manhattan Bank, Global Trust Services