The main component may be an inorganic sulfate salt, likely with water of crystallization. The spectrum exhibits a strong, broad S=O asymmetric stretch characteristic of sulfate near 1107 cm⁻¹ and a bending absorption at 614 cm⁻¹. Broad O–H stretching bands at 3262 and 3343 cm⁻¹ together with an H–O–H bending mode at 1644 cm⁻¹ indicate the presence of water in a hydrated crystal lattice. Further confirmation of the specific cation, such as potassium or sodium, could be obtained by elemental analysis or ion chromatography