CNSIG Inner Mongolia Chemical Sodium Industry Co., Ltd. is a state-owned large-scale chlor-alkali chemical enterprise under China National Salt Industry Group Co., Ltd. and controlled by China Salt Jilantai Salt & Chemical Group Co., Ltd. It falls under the chlor-alkali industry subsector within the broader chemical raw materials and chemical products manufacturing sector. The company’s core business encompasses research, production, and sales of fundamental chemical products including ion-exchange membrane caustic soda, polyvinyl chloride (PVC), calcium carbide, chlorine gas, hydrogen gas, hydrochloric acid, and sodium hypochlorite. Leveraging abundant raw salt, limestone, and energy resources in the Alxa region, the company has established an integrated industrial chain spanning “raw salt → calcium carbide → chlor-alkali → PVC,” with comprehensive annual production capacities of 300,000 tons of caustic soda, 250,000 tons of PVC, and 300,000 tons of calcium carbide. The enterprise possesses robust technical expertise in energy conservation, carbon emission reduction, and green manufacturing, operating an autonomous regional-level enterprise technology center and holding seven invention patents and 23 utility model patents. Its core technologies include low-mercury catalyst acetylene-based PVC synthesis, energy-saving optimization of ion-exchange membrane electrolyzers, and balanced utilization of chlorine and hydrogen gases; its “high-current-density ion-exchange membrane electrolyzer energy-saving technology” has been included in the “National Key Energy-Saving and Low-Carbon Technology Promotion Catalogue (2023 Edition).” The company has obtained certification for the three major management systems—ISO 9001, ISO 14001, and ISO 45001—and holds the “National Industrial Product Production License,” “Work Safety Production License,” and “Pollutant Discharge Permit” (No.: 91152921783008937W001V), all of which remain valid. Its products are widely applied across industries in Northwest China, including construction materials, textiles, papermaking, water treatment, aluminum smelting, chemical fibers, and pharmaceutical intermediates. Its PVC complies with standard GB/T 5761–2018 and has passed CTC testing and certification; its caustic soda and sodium hypochlorite also meet stringent downstream process requirements. The enterprise actively participates in regional circular economy initiatives, having constructed supporting environmental protection facilities—including calcium carbide slag brick production, chlorine gas recovery and reuse, and waste-heat power generation—achieving comprehensive energy consumption per unit product consistently below the national industry energy-saving benchmark value for three consecutive years. Currently, its operations focus on Inner Mongolia and adjacent provinces; cooperation priorities include upstream-downstream coordination along the chlor-alkali industrial chain, promotion and application of energy-saving technologies, customized supply of hazardous chemicals, and joint development of circular economy projects.