0000074303 2020-12-17 2020-12-17 0000074303 false 8-K 2020-12-17 OLIN CORPORATION VA 1-1070 13-1872319 190 Carondelet Plaza, Suite 1530 Clayton, MO 63105 314 480-1400 false false false false Common Stock, $1.00 par value per share OLN NYSE false