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Sulfur Dioxide Gas SO2

Sulfur dioxide is a colorless gas with a strong pungent suffocating irritating odor at normal temperature and pressure. It does not burn in the air, nor does it support combustion. It is easy to liquefy, and the cylinder pressure is usually less than 0.5MPa. Sulfur dioxide gas is mainly inhaled through the respiratory tract, which has irritating and corrosive effects on the local area, and its toxicity is roughly the same as that of hydrochloric acid.
Availability:
Quantity:
  • 7446-9-5

  • OEM/ODM

Technical Indicators

Components/Impurities

Sulphur dioxide/4.0N

Sulfur dioxide content SO2

99.99%

Residue

≤0.01%

Arsenic As

≤0.000004%

Water H2O

≤0.01%


The Packing

Type of cylinder

Gas pressure

Gas volume

Net weight of gas

800L cylinder

0.2MPa

370m3

1000kg

400L cylinder

0.2MPa

185m3

500kg

40L cylinder

0.2MPa

16.7m3

45kg

10L cylinder

0.2MPa

3.7m3

10kg

Cylinder interface: CGA330


Transport information

Transportation information

chemical symbol

SO2

GAS No.

7446-9-5

DOT Shipping Class

2.3

DOT tags

Toxic and corrosive gas

Canadian Shipping Classification

2.2

Substance Identification (S) No.

1079

UN No.

UN 1079

Main hazards

Toxic and irritating gas

Toxicity (TLV)

13mg/m3

Smell

pungent odor


physical properties

Physical properties

Chemical name

SO2

Molar mass

64.06

Gas density (-10.01℃, 101.325kPa)

3.05kg/m3

Relative density (air=1, 25℃, 101.325kPa)

2.263

Gas-liquid volume ratio (15℃, 100kPa)

353L/L

Critical temperature

157.6℃

Critical pressure

7884kPa

Critical density

525kg/m3

Compression factor

Temperature(℃)/Pressure

100kPa 200kPa 250kPa 500kPa

15℃

0.9804 0.96 0.952

50℃

0.9875 0.9746 0.9681 0.94

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℃)

0.008583W/(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 level

0

Explosiveness level

0


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