等级
ACS reagent
质量水平
蒸汽密度
2.3 (vs air)
检测方案
≥6% SO2 basis (by Na2S2O3, titration)
形式
liquid
浓度
≥6%
灼烧残渣
≤0.005%
密度
1.03 g/mL at 25 °C (lit.)
痕量阴离子
chloride (Cl-): ≤5 ppm
痕量阳离子
Fe: ≤5 ppm
heavy metals (as Pb): ≤2 ppm
SMILES字符串
OS(O)=O
InChI
1S/H2O3S/c1-4(2)3/h(H2,1,2,3)
InChI key
LSNNMFCWUKXFEE-UHFFFAOYSA-N
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一般描述
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.
应用
Sulfurous acid can be used as a reducing agent in chemical synthesis.
警示用语：
Danger
危险声明
危险分类
Acute Tox. 4 Inhalation - Eye Dam. 1 - Skin Corr. 1B
WGK
WGK 1
闪点(°F)
Not applicable
闪点(°C)
Not applicable
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)
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
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
Daniela Vullo et al.
Bioorganic & medicinal chemistry letters, 16(12), 3139-3143 (2006-04-20)
An inhibition study of the cytosolic carbonic anhydrase (CA, EC 4.2.1.1) isozyme VII (hCA VII) with anions has been conducted. Cyanate, cyanide, and hydrogensulfite were weak hCA VII inhibitors (K(I)s in the range of 7.3-15.2 mM). Cl- and HCO3- showed
Heng Yu et al.
Bioresource technology, 199, 188-193 (2015-09-06)
This study established a new more neutral magnesium bisulfate pretreatment (MBSP) using magnesium bisulfate as sulfonating agent for improving the enzymatic hydrolysis efficiency of corn stover. Using the MBSP with 5.21% magnesium bisulfate, 170°C and pH 5.2 for 60 min
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