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Sulfurous acid is used as a reducing agent, bleaching agent and disinfectant. It is utilized for bleaching of moistened wool, straw for hats, and other materials injured by chlorine. It finds application as a disinfectant as well as used externally for its parasiticidal effect in various skin diseases. Its derivative viz. sulfites are included in antiseptics, antifermentatives, and antizymotics.
Gaines, T. W.; Nakano, T.; Chujo, Y.; Trigg, E. B.; Winey, K. I.; Wagener, K. B. Precise Sulfite Functionalization of Polyolefins via ADMET Polymerization. ACS Macro Lett. 2015, 4 (6), 624-627.
Sinha, R. K.; Scuderi, D.; Maitre, P.; Chiavarino, B.; Crestoni, M. E.; Fornarini, S. Elusive sulfurous acid: Gas-phase basicity and IR signature of the protonated species. J. Phys. Chem. Lett. 2015, 6 (9), 1605-1610.
Hazard Statements: H319-H335
Causes serious eye irritation. May cause respiratory irritation.
Precautionary Statements: P261-P264b-P271-P280i-P304+P340-P305+P351+P338-P312-P337+P313-P501c
Avoid breathing dust/fume/gas/mist/vapours/spray. Wash face, hands and any exposed skin thoroughly after handling Use only outdoors or in a well-ventilated area. Wear eye/face protection. IF INHALED: Remove to fresh air and keep at rest in a position comfortable for breathing. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Call a POISON CENTER or doctor/physician if you feel unwell. If eye irritation persists: Get medical advice/attention. Dispose of contents/ container to an approved waste disposal plant