LSB INDUSTRIES, INC. SUBSIDIARY LISTING as of March 31, 2000 LSB INDUSTRIES, INC. (Direct subsidiaries in bold italics) Prime Financial Corporation Prime Holdings Corporation (f/k/a Tower IV Corporation, f/k/a LSB Leasing Corp.) Northwest Capital Corporation Northwest Energy Enterprises, Inc. Tower Land Development Corp. ClimaChem, Inc. (5% stock ownership) LSB Holdings, Inc. LSB-Europa Limited LSB Industries Int'l Corp. (f/k/a LSB Indonesia Corporation, f/k/a LSB Corporation) Summit Machine Tool Inc. Corp. Saffron Corporation Explosives Equipment Corp. Clipmate Corporation (20% held by Waldock and Starrett) L&S Automotive Technologies, Inc. (f/k/a L&S Automotive Products Co.) Climatex, Inc. LSB Financial Corp. Aerobit Industries, Limited (7.98% held by Horovitz and Landsome) Climate Master International Limited ROL-BIT Ltd. (5% held by Horovitz) ClimateCraft Technologies, Inc. INDUSTRIAL PRODUCTS BUSINESS Summit Machine Tool Manufacturing Corp. Hercules Energy Mfg. Corporation Morey Machinery Manufacturing Corporation (f/k/a Fertilizer Equipment Corp.) (10% held by Jonathon Morey) ENVIRONMENTAL/CHEMICAL BUSINESS ClimaChem, Inc. (95% stock ownership) Northwest Financial Corporation Climate Mate, Inc. The Environmental Group International Limited LSB Chemical Corp. LSB Australia Pty. Ltd. (f/k/a Total Energy Systems Limited) Total Energy Systems (NZ) Limited T.E.S. Mining Services Pty. Ltd. Total Energy Systems (International) Pty Ltd El Dorado Chemical Company Slurry Explosive Corporation El Dorado Nitrogen Company (f/k/a LSB Nitrogen Corporation, f/k/a LSB Import Corp.) DSN Corporation Universal Tech Corporation The Environmental Group, Inc. International Environmental Corporation Climate Master, Inc. CHP Corporation Koax Corp. The Climate Control Group, Inc. (f/ka APR Corporation) ClimateCraft, Inc. (f/k/a Summit Machine Tool Systems, Inc.) ACP International Limited (f/k/a ACP Manufacturing Corp.) ThermalClime, Inc. (f/k/a LSB South America Corporation) MultiClima Holdings, Inc. (f/k/a LSB International Corp.) AUTOMOTIVE PRODUCTS BUSINESS LSA Technologies Inc. L&S Automotive Products Co. [DE] L&S Bearing Co. (f/k/a L&S Automotive Products Co., f/k/a LSB Bearing Corp.) International Bearings, Inc. LSB Extrusion Co. Rotex Corporation Tribonetics Corporation