JOINT FILING AGREEMENT

                             JOINT FILING AGREEMENT


     The Schedule 13D,  relating to the common stock,  par value $.10 per share,
of LSB  Industries,  Inc.,  dated  September  4,  1997,  is filed on  behalf  of
Wynnefield  Partners Small Cap Value L.P.,  Wynnefield  Partners Small Cap Value
L.P. I, Channel  Partnership II L.P.,  Wynnefield  Small Cap Value Offshore Fund
Ltd and Xxxxxx Xxxx.

     Dated:  September 4, 1997

                            WYNNEFIELD PARTNERS SMALL CAP VALUE L.P.

                            By: WYNNEFIELD CAPITAL MANAGEMENT, LLC,
                                as general partner


                                By:   /S/ XXXXXX XXXX
                                    -------------------------
                                        Xxxxxx Xxxx
                                      Managing Member

                            WYNNEFIELD PARTNERS SMALL CAP VALUE L.P. I

                            By: WYNNEFIELD CAPITAL MANAGEMENT, LLC,
                                as general partner


                                By:    /S/ XXXXXX XXXX
                                    -------------------------
                                         Xxxxxx Xxxx
                                       Managing Member

                            CHANNEL PARTNERSHIP II L.P.


                                By:    /S/ XXXXXX XXXX
                                    -------------------------
                                         Xxxxxx Xxxx
                                       General Partner

                            WYNNEFIELD SMALL CAP VALUE OFFSHORE FUND LTD

                            By: WYNNEFIELD CAPITAL, INC.,
                                as general partner


                                By:    /S/ XXXXXX XXXX
                                     -------------------------
                                         Xxxxxx Xxxx
                                          President


                                       /S/ XXXXXX XXXX
                                    -------------------------
                                         Xxxxxx Xxxx