SECURITIES AND EXCHANGE COMMISSION

                             WASHINGTON, D.C. 20549



                                    FORM 8-K

                                 CURRENT REPORT

                     PURSUANT TO SECTION 13 OR 15(d) OF THE
                         SECURITIES EXCHANGE ACT OF 1934

         Date of Report (Date of earliest event reported): May 17, 2001





                                OLIN CORPORATION

             (Exact name of registrant as specified in its charter)


                                                                      

               Virginia                             1-1070                              13-1872319
   (State or Other Jurisdiction of         (Commission File Number)         (IRS Employer Identification No.)
            Incorporation)

                          P.O. Box 4500, 501 Merritt 7,                                 06856-4500
                               Norwalk, Connecticut                                     (Zip Code)
                     (Address of principal executive offices)


                                 (203) 750-3000
              (Registrant's telephone number, including area code)


                                 Not Applicable
          (Former name or former address, if changed since last report)






Item 7.    Exhibits.
           ---------

        Exhibit No.          Exhibit
        -----------          -------
           99.1              Press Release, dated May 17, 2001.

Item 9.    Regulation FD Disclosure.
           -------------------------

         In accordance with General Instruction B.2. of Form 8-K, the following
information shall not be deemed to be "filed" for purposes of Section 18 of the
Securities Exchange Act of 1934, as amended, nor shall it be deemed incorporated
by reference in any filing under the Securities Act of 1933, as amended. Olin
disclaims any intention or obligation to update or revise this information.

         Attached as Exhibit 99.1, and incorporated herein by reference, is a
copy of the registrant's press release dated May 17, 2001, announcing it has
signed a definitive agreement to acquire Monarch Brass & Copper Corp., a
privately held specialty brass manufacturer headquartered in Waterbury,
Connecticut.

                                                 SIGNATURE

         Pursuant to the requirements of the Securities Exchange Act of 1934,
the Registrant has duly caused this report to be signed on its behalf by the
undersigned hereunto duly authorized.

                                    OLIN CORPORATION

                                    By:          /s/ Johnnie M. Jackson, Jr.
                                        ----------------------------------------
                                        Name:    Johnnie M. Jackson, Jr.
                                        Title:   Vice President, General
                                                 Counsel and Secretary

Date:  May 17, 2001


                                  EXHIBIT INDEX

        Exhibit No.         Exhibit
        -----------         -------
           99.1             Press Release, dated May 17, 2001.