Page 78 - Praxair - Specialty Gases and Equipment Solutions

SO 2
Sulfur Dioxide

Transportation (M)SDS Reference
Information P-4655
UN Number: 1079 CAS Number
United States of America Canada Mexico
Shipping Name Sulfur Dioxide Sulfur Dioxide Sulfur Dioxide 7446 - 09 - 5
Hazard Class 2.3 (8) 2.3 (8) 2.3 General Description
Label Toxic Gas, Toxic Gas, Toxic Gas, Colorless, toxic, corrosive, nonflammable,
Corrosive Corrosive Corrosive liquefied gas with a sharp, pungent odor.

Product/Grade Purity Part Cylinder H 2 O Residue Acid as
Number (H 2 SO 4 )
Anhydrous, 3.8 99.98 wt% SD 3.8 CL, K, G 100 75 25
(liquid phase) ppm/wt ppm/wt
Commercial, 3.0 99.0 wt% SD 3.0 CL, K, G – – –
(liquid phase)
Concentrations given are ppm by volume unless otherwise specified.
Maximum ppm unless otherwise noted.

Cylinders

Cylinder Style Size Connection Pressure Volume Gross Weight
Type in (cm) CGA psig (bar) lb (kg) lb (kg)
CL Low Pressure Steel 47 x 10 (119.4 x 25.4) 660 34 (2.34) 150 (68) 235 (106.8)
K High Pressure Steel 51 x 9 (129.5 x 22.9) 660 34 (2.34) 100 (45.5) 225 (102.3) Section B – Pure Gases
G High Pressure Steel 20 x 6 (50.8 x 15.2) 660 34 (2.34) 19 (8.62) 48 (22)

Equipment Recommendations

i

Praxair, high quality specialty gases
and equipment for your applications.
See Sections F and G
for safety and technical
information.

4008 Series – Special Purpose
Regulator for Corrosive Service
(see page E •272)

1-877-PRAXAIR www.praxairdirect.com B•77