Product Name: liquid sulfur dioxide SO2
Other names: sulfurous anhydride, thionyl anhydride; Sulfur dioxide, Sulfurous oxide, Sul-furous acid anhydride.
Molecular formula: SO2
UN No. UN 23013
CAS No. 7446-09-5
Sulfur dioxide purity: 99.99%
Sulfur Packing: 10L high pressure steel bottles 10kg / bottle, 40LGB5099 steel bottle 45kg / bottle, in addition to 500kg / cans, 1 t / jar packaging, SO2 special valve QF-10 bottle valve.
Dioxide Product Description: liquid sulfur dioxide at ambient temperature and pressure for a strong spicy smell choking stimulation colorless gas.
Not available. Mainly used in the preparation of H2SO4, Na2S and other inorganic sulfur compounds, organic synthesis, fumigants, insecticides, preservatives fruits and vegetables, easily liquefied disinfected with fungicides. Air does not burn. , Bleach, paper industry, leather tanning, refrigerant, oil refining, smelting magnesium, preservatives, standard gas, calibration gas, a standard gas meter line.

Note: You must wear protective clothing, goggles, gas mask or respirator when operating sulfur dioxide. Workplace should be appropriate
The good indoor ventilation, to isolate and combustible materials. Wet sulfur dioxide has a strong corrosive. At room temperature, anhydrous aluminum available dioxide, copper, copper alloy, nickel, ventilation, gas cartridge to be placed outdoors or a nickel alloy, lead, iron, cast iron, steel, molybdenum and magnesium. Of wet sulfur dioxide, available stainless steel, Hastelloy, polytetrafluoroethylene, polychlorotrifluoroethylene and the like.
Available water spray, foam, sand fire when fire. When the gas leak, use the exhaust fan discharge to the water tower or a fume hood and water towers connected.
Physicochemical properties of sulfur dioxide

MW: 64.063
Melting point (101.325kPa): -75.5 ℃
Boiling point (101.325kPa): -10.0 ℃
Liquid density (-10.01 ℃, 101.325kPa): 1458kg / m3
Gas density (-10.01 ℃, 101.325kPa): 3.049kg / m3
The relative density (gas, air = 1,25 ℃, 101.325kPa): 2.263
Hematocrit (2.1 ℃, 101.325kPa): 0.3683m3 / kg
Gas-liquid volume ratio (15 ℃, 100kPa): 535L / L
Critical temperature: 157.6 ℃
Critical pressure: 7884kPa
Critical Density: 525kg / m3
The heat of fusion (-75.52 ℃, 1.67kPa): 115.56kJ / kg
Heat of vaporization (-10.01 ℃, 101.325kPa): 389.37kJ / kg
Specific heat capacity (gas, 25 ℃, 101.325kPa): Cp = 622.57J / (kg · K)
Cv = 482.84J / (kg · K)
Specific heat ratio (gas, 25 ℃, 101.325kPa): Cp / Cv = 1.29
Vapor pressure (-40 ℃): 21.2kPa
(0 ℃): 155.0kPa
(40 ℃): 625kPa
Viscosity (101.325kPa, 0 ℃): 0.01158mPa · S
(Liquid, 0 ℃): -0.40mPa · S
Surface tension (-10 ℃): 28.59mN / m
Thermal conductivity (101.325kPa, 0 ℃): 0.098583w / (m · K)
(Liquid, -25 ℃): 0.2214W / (m · K)
Refractive index (gas, 0 ℃, 101.325kPa): 1.000686,
(Gas; 25 ℃, 101.325kPa): 1.0006022
Toxicity Level: 2
Flammability Rating: 0
Explosive level: 0

Sulfur dioxide at ambient temperature and pressure for a colorless gas with a strong odor stimulus pungent suffocating. Easily liquefied. Air does not burn. Not available. At room temperature, the absolute dry SO2 reaction is weak, only strong oxidant be oxidized to SO2 SO3. When oxygen in the presence of a catalyst allows only the oxidation of SO2 to SO3. At room temperature. Wet H2S reacts with SO2 sulfur precipitation. In the presence of a catalyst at high temperature and the hydrogen can be reduced to the H2S, carbon monoxide is reduced to become sulfur. Copper, iron corrosion. Soluble in water, sulfuric acid, acetic acid, methanol, ethanol, chloroform, diethyl ether, benzene, toluene, nitrobenzene, acetone, liquid camphor.