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Sulfur dioxide solution

SIGALD/247626 - ACS reagent, ≥6%

Synonym: Sulfurous acid; Sulfurous anhydride

CAS Number: 7782-99-2
Empirical Formula (Hill Notation): H2O3S
Molecular Weight: 82.08
EC Number: 231-973-1
MDL Number: MFCD00011335
Linear Formula: H2SO3
Product Type: Chemical
Catalog Number PKG Qty. Price Quantity
45-247626-100G 100 g
 $84.40
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45-247626-500G 500 g
 $149.00
1/EA		 Add To Favorites
45-247626-2KG 2 kg
 $276.00
1/EA		 Add To Favorites

 

anion traces chloride (Cl-): ≤5 ppm
assay ≥6% SO2 basis (by Na2S2O3, titration)
cation traces Fe: ≤5 ppm
  heavy metals (as Pb): ≤2 ppm
concentration ≥6%
density 1.03 g/mL at 25 °C (lit.)
form liquid
grade ACS reagent
ign. residue ≤0.005%
InChI 1S/H2O3S/c1-4(2)3/h(H2,1,2,3)
InChI key LSNNMFCWUKXFEE-UHFFFAOYSA-N
Quality Level 200 
SMILES string OS(O)=O
vapor density 2.3 (vs air)
Application: Sulfurous acid can be used as a reducing agent in chemical synthesis.
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+, S2O52- and HSO3-. The predominant species present in the solution are pH dependent.
Packaging: 100, 500 g in glass bottle
Packaging: 2 kg in glass bottle
Purity ≥6% SO2 basis (by Na2S2O3, titration)
Density 1.03 g/mL at 25 °C (lit.)
UNSPSC 12352300

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