Sulfur dioxide

Return

Sulfur dioxide

Click and drag to move the molecule

Retour

SO₂

Sulfur dioxide

Physical Properties

Under solid (grey), liquid (blue) and vapor states (white) along the equilibrium curves

General properties
Solid phase
Liquid Phase
Gas Phase

(P)

log(P)

Download

Molecular weight

64.064
g/mol
Content in dry air

/

Critical Point

Temperature

157.6
°C
315.68 °F 430.75 K
Pressure

78.841
bar
7.8841E6 pa 1143.4916 lbf/in2 77.81 Atm 7884.1 Kpa 5.9136E4 mmHg
Density

525.11
kg/m³
32.7815 lb/ft³

Triple Point

Temperature

- 75.45
°C
- 103.81 °F 197.7 K
Pressure

1.6744E-2
bar
1674.39 pa 2.4285E-1 lbf/in2 1.6525E-2 Atm 1.6744 Kpa 12.559 mmHg

Pressure 1.013 bar

Melting point

- 73.15
°C
- 99.67 °F 200 K
Latent heat of fusion (at melting point)

115.525
kJ/kg
49.7001 Btu/lb 27.6111 kcal/kg
Solid density

/

Pressure 1.013 bar

Liquid density (at boiling point)

1461.1
kg/m³
91.2133 lb/ft³
Boiling point

- 10.02
°C
13.964 °F 263.13 K
Latent heat of vaporization (at boiling point)

389.06
kJ/kg
167.3779 Btu/lb 92.9876 kcal/kg

Pressure1.013barTemperature

Compressibility factor Z

9.7509E-1

9.8025E-1

9.8285E-1
Cp/Cv ratio γ

1.2966

1.2863

1.2805
Dynamic viscosity

1.1796E-4
Po
11.7955 µPa.s 1.1796E-5 PA.S 7.9262E-6 lb/ft/s

1.2475E-4
Po
12.4747 µPa.s 1.2475E-5 PA.S 8.3826E-6 lb/ft/s

1.2924E-4
Po
12.9238 µPa.s 1.2924E-5 PA.S 8.6844E-6 lb/ft/s
Gas density at boiling point

3.057
kg/m³
1.9084E-1 lb/ft³

3.057
kg/m³
1.9084E-1 lb/ft³

3.057
kg/m³
1.9084E-1 lb/ft³
Gas density

2.9305
kg/m³
1.8294E-1 lb/ft³

2.7633
kg/m³
1.7251E-1 lb/ft³

2.6636
kg/m³
1.6628E-1 lb/ft³
Heat capacity at constant pressure Cp

6.6921E-1
kJ/(kg.K)
1.5994E-1 BTU/lb∙°F 669.206 J/kg∙K 1.5994E-1 kcal/kg∙K

6.5898E-1
kJ/(kg.K)
1.575E-1 BTU/lb∙°F 658.982 J/kg∙K 1.575E-1 kcal/kg∙K

6.562E-1
kJ/(kg.K)
1.5684E-1 BTU/lb∙°F 656.203 J/kg∙K 1.5684E-1 kcal/kg∙K
Heat capacity at constant volume Cv

5.1614E-1
kJ/(kg.K)
1.2336E-1 BTU/lb∙°F 516.14 J/kg∙K 1.2336E-1 kcal/kg∙K

5.123E-1
kJ/(kg.K)
1.2244E-1 BTU/lb∙°F 512.3 J/kg∙K 1.2244E-1 kcal/kg∙K

5.1246E-1
kJ/(kg.K)
1.2248E-1 BTU/lb∙°F 512.456 J/kg∙K 1.2248E-1 kcal/kg∙K
Liquid (at boiling point)/gas equivalent

498.58
mol/mol

528.75
mol/mol

548.54
mol/mol
Solubility in water

/

3.45E-2
mol/mol

2.46E-2
mol/mol
Specific gravity

2.26

2.26

2.26
Specific volume

3.412E-1
m³/kg
5.4655 ft³/lb

3.619E-1
m³/kg
5.7971 ft³/lb

3.754E-1
m³/kg
6.0133 ft³/lb
Thermal conductivity

8.434
mW/m∙K
4.8763E-3 Btu/ft/h/°F 7.2568E-2 cal/hour∙cm∙°C 2.0158E-5 cal/s∙cm∙°C 8.434E-3 W/(m∙K)

9.092
mW/m∙K
5.2568E-3 Btu/ft/h/°F 7.823E-2 cal/hour∙cm∙°C 2.173E-5 cal/s∙cm∙°C 9.092E-3 W/(m∙K)

9.54
mW/m∙K
5.5158E-3 Btu/ft/h/°F 8.2084E-2 cal/hour∙cm∙°C 2.2801E-5 cal/s∙cm∙°C 9.54E-3 W/(m∙K)
Vapor pressure

1.5637
bar
1.5637E5 pa 22.6795 lbf/in2 1.5433 Atm 156.37 Kpa 1172.8747 mmHg

2.8104
bar
2.8104E5 pa 40.7614 lbf/in2 2.7736 Atm 281.04 Kpa 2107.9792 mmHg

4.0015
bar
4.0015E5 pa 58.0368 lbf/in2 3.9492 Atm 400.15 Kpa 3001.3801 mmHg

return

SO₂

Sulfur dioxide

Liquid / Gas Volumes

Calculate a liquid or gas volume or a mass

Liquid Phase

At boiling point at 1.013 bar

m3(Volume)

kg(Mass)

Gas Phase

in standard conditions (1,013 bar, 15°C)

m3(Volume)

kg(Mass)

Retour

SO₂

Sulfur dioxide

Applications

Examples of uses of this molecule in Industry and Healthcare

Beverage

Sulfur dioxide allows to preserve wines from microbes or further oxidation during winemaking.

Beverage

Food

Sulfur dioxide is used to preserve, fumigate and bleach grain.

Food

Laboratories & Research Centers

Sulfur dioxide is used in calibration gas mixtures for petrochemical industry, environmental emission monitoring, industrial hygiene monitors and trace impurity analyzers.

Laboratories & Research Centers

Other

Sulfur dioxide is used as a flotation depressant for sulfide ores in the mining industry.

Electronic components

Sulfur dioxide is used as an additive to etching gas mixtures.

Electronic components

Pulp & Paper

Sulfur dioxide is used to bleach paper pulp.

Retour

SO₂

Sulfur dioxide

Safety & Compatibility

Information to safely use this molecule

Major hazards
Material compatibility

Safety

GHS04

Gas under pressure
GHS05

Corrosive
GHS06

Acute Toxicity

Threshold of toxicity

VME

2
ppm
or 5
mg/m3
VLE

5
ppm
or 10
mg/m3
ILV-8h

/
ILV 15mn

/
TLV-TWA (USA)

2
ppm
2 ppm 2.E-4 vol% 2.E-6 vol/vol
TLV-STEL (USA)

5
ppm
5 ppm 5.E-4 vol% 5.E-6 vol/vol

Odor

Pungent and irritating

Metals

Aluminium

Satisfactory
Brass

Satisfactory
Monel

Satisfactory
Copper

Satisfactory
Ferritic Steel

Satisfactory
Stainless steel

Satisfactory
Zinc

Not recommended
Titanium

No data

Plastics

Polytetrafluoroethylene

Satisfactory
Polychlorotrifluoroethylene

Satisfactory
Polyvinylidene fluoride

Satisfactory
Polyvinyl chloride

Not recommended
significant loss of mass
Ethylene tetrafluoroethylene

Satisfactory
Polycarbonate

Not recommended
Polyamide

Not recommended
significant loss of mass
Polypropylene

Satisfactory

Elastomers

Buthyl (isobutene- isoprene) rubber

Satisfactory
Nitrile rubber NBR

Not recommended
significant loss of mass
Chloroprene

Not recommended
significant loss of mass
Silicone

Not recommended
significant loss of mass
Perfluoroelastomers

Satisfactory
Fluoroelastomers

Not recommended
significant loss of mass
Neoprene

Not recommended
Polyurethane

Satisfactory
Ethylene-Propylene

Satisfactory

Lubricants

Hydrocarbon based lubricant

Not recommended
significant loss of mass
Fluorocarbon based lubricant

Not recommended
material contamination

Materials compatibility

Recommendations : Air Liquide has gathered data on the compatibility of gases with materials to assist you in evaluating which materials to use for a gas system. Although the information has been compiled from what Air Liquide believes are reliable sources (International Standards: Compatibility of cylinder and valve materials with gas content; Part 1- Metallic materials: ISO11114-1 (March 2012), Part 2 - Non-metallic materials: ISO11114-2 (April 2013), it must be used with extreme caution and engineering judgement. No raw data such as these can cover all conditions of concentration, temperature, humidity, impurities and aeration. It is therefore recommended that this table is only used to identify possible materials for applications at high pressure and ambient temperature. Extensive investigation and testing under the specific conditions of use need to be carried out to validate a material selection for a given application. Contact the regional Air Liquide team for expertise service.

Retour

SO₂

Sulfur dioxide

Learn More

General information

More information

Sulfur dioxide is a noticeable component in the atmosphere, especially following volcanic eruptions.