SULFUROUS ACID A.C.S. REAGENT (C005B-079818)

General description

Sulfurous acid (H₂SO₃), a weak diprotic acid, is formed when sulfur dioxide (SO₂) dissolves in water. Sulfurous acid is a complex mixture of various hydrates of SO₂ and the ions H₃O⁺, S₂O₅^2- and HSO^3-. The predominant species present in the solution are pH dependent.

Application

Sulfurous acid can be used as a reducing agent in chemical synthesis.

Molecular Weight: 82.08. Empirical Formula: H₂O₃S. linearFormula: H₂SO₃. grade: ACS reagent. Quality Level: 200. vapor density: 2.3 (vs air). Assay: ≥. 6% SO₂ basis (by Na₂S₂O₃, titration). form: liquid. concentration: ≥. 6%. ign. residue: ≤. 0.005%. density: 1.03 . g/mL . at 25 . °C (lit.). anion traces: chloride (Cl^-): ≤. 5 . ppm. cation traces: Fe: ≤. 5 . ppm, heavy metals (as Pb): ≤. 2 . ppm. SMILES string: OS(O): O. InChI: 1S/H2O3S/c1-4(2)3/h(H2,1,2,3). InChI key: LSNNMFCWUKXFEE-UHFFFAOYSA-N. Pictograms: GHS05,GHS07. Signal Word: Danger. Hazard Statements: H314 - H332. Precautionary Statements: P261 - P271 - P280 - P303 + P361 + P353 - P304 + P340 + P310 - P305 + P351 + P338. Hazard Classifications: Acute Tox. 4 Inhalation - Eye Dam. 1 - Skin Corr. 1B. Storage Class Code: 8B - Non-combustible, corrosive hazardous materials. WGK: WGK 1. Flash Point(F): Not applicable. Flash Point(C): Not applicable.