Sodium sulfite (Na₂SO₃) is a white, water-soluble powder with mild alkalinity (pH ≈ 9–10) and a melting point around 33 °C. It serves as an antioxidant, preservative, reducer, and oxygen scavenger across industries such as water treatment, pulp and paper, textiles, photography, and food processing. Basekim supplies high-purity anhydrous and custom-grade sodium sulfite in moisture-resistant packaging, complete with COA and MSDS documentation.