Ammonium sulfate can be used as a nitrogen fertilizer, in the production of sulfuric acid and other chemical intermediates, as well as in pickling and metal surface treatment. This dataset includes major raw materials, energy inputs, atmospheric emissions, waterborne emissions, and waste generated during the production process. Infrastructure such as production equipment and facility construction, as well as materials and energy consumed during decommissioning, are excluded from the system boundaries of this dataset. The life cycle inventory data are sourced from literature. The production process of coal-based synthetic natural gas involves coal gasification, purification, and methanation steps, with ammonium sulfate being a by-product of this process.