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247626

Sulfur dioxide solution

Name: Sulfur dioxide solution
Brand: SIGALD

ACS reagent, ≥6%

Synonyme(s) :

Sulfurous acid, Sulfurous anhydride

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A propos de cet article

Formule linéaire :

H₂SO₃

Numéro CAS:

7782-99-2

Poids moléculaire :

82.08

NACRES:

NB.24

PubChem Substance ID:

329752746

UNSPSC Code:

12352300

EC Number:

231-973-1

MDL number:

MFCD00011335

Assay:

≥6% SO₂ basis (by Na₂S₂O₃, titration)

Concentration:

≥6%

Form:

liquid

Grade:

ACS reagent

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Propriétés

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

Description

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.

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Danger

wgk

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable

target_organs

Respiratory system

Hazard Classifications

Acute Tox. 4 Inhalation - Eye Dam. 1 - Skin Corr. 1B - STOT SE 1 Inhalation

Classe de stockage

6.1D - Non-combustible acute toxic Cat.3 / toxic hazardous materials or hazardous materials causing chronic effects

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Pretreatment of Sugar Beet Pulp with Dilute Sulfurous Acid is Effective for Multipurpose Usage of Carbohydrates.

M Kharina et al.

Applied biochemistry and biotechnology, 179(2), 307-320 (2016-01-29)

Sulfurous acid was used for pretreatment of sugar beet pulp (SBP) in order to achieve high efficiency of both extraction of carbohydrates and subsequent enzymatic hydrolysis of the remaining solids. The main advantage of sulfurous acid usage as pretreatment agent

The thermodynamic ionization constants of sulfurous acid at 25?¹.

Tartar HV and Garretson HH.

Journal of the American Chemical Society, 63(3), 808-816 (1941)

Canopy management in rainfed vineyards (cv. Tempranillo) for optimising water use and enhancing wine quality.

Miquel Pascual et al.

Journal of the science of food and agriculture, 95(15), 3067-3076 (2015-07-16)

Rainfed viticulture, mainly in semi-arid environments, is limited by environmental variability, particularly precipitation and its seasonal distribution, and soil water availability, thus ultimately determining the final quality of grape and wine. Studies on the feasibility of practices such as canopy

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Numéro d'article de commerce international

Référence	GTIN
247626-2KG	04061825900902
247626-500G	04061825900919
247626-100G	04061838581259