The FTIR spectrum is dominated by a single intense absorption at 1112 cm⁻¹. The library match suggests aluminum ammonium disulfate dodecahydrate, but high-ranking candidates also include poly(vinyl methyl ether) and polyethylene glycols. The band at 1112 cm⁻¹ is consistent with both the asymmetric S=O stretching of sulfate ions, as expected in alums, and the C–O–C symmetric stretch of aliphatic ethers, typical of polyethers. Consequently, the material can be broadly classified as an oxygen-rich compound, likely either an inorganic sulfate hydrate or an organic polyether/glycol, with the available single peak preventing a more definitive assignment FTIR In-Depth Interpretation was not selected for this task, so this section shows the library-search result only and no deep AI interpretation was run.