General Description
Sulfur dioxide gas (SO2 gas) is a colorless gas with a choking or suffocating odor. Boiling point -10°C. Heavier than air. Very toxic by inhalation and may irritate the eyes and mucous membranes. Under prolonged exposure to fire or heat the containers may rupture violently and rocket.
Liquid sulfur dioxide (SO2) is a versatile chemical with many uses, both in liquid form or as a source of gaseous SO2. Liquid SO2 is used the pulp and paper industry, mining industry, and in the food industry as a preservative. It can function as a reducing agent, an oxidizing agent, a pH controller, purifying agent, preservative, a germicide and bleaching agent. SO2 can also be used as a refrigerant, heat transfer fluid and selective solvent.
| SO2 |
NOx |
| 20mg/m³ |
30mg/m³ |
60mg/m³ |
120mg/m³ |
320mg/m³ |
30mg/m³ |
40mg/m³ |
130mg/m³ |
320mg/m³ |
550mg/m³ |
| 2 |
2 |
56 |
54 |
54 |
0 |
54 |
56 |
56 |
2 |
| 5 |
5 |
5 |
0 |
0 |
5 |
5 |
5 |
0 |
0 |
| 1 |
1 |
1 |
0 |
0 |
0 |
1 |
1 |
1 |
0 |
| 3 |
3 |
3 |
0 |
0 |
0 |
3 |
3 |
3 |
0 |
| 11 |
11 |
65 |
54 |
54 |
5 |
63 |
65 |
60 |
2 |
| 21 |
20 |
100 |
100 |
100 |
20 |
100 |
100 |
100 |
20 |
NO standard gas should be purchased, and the concentration is NO x concentration of the upper table divided by 1.53
The application and specific details of gases
| Nitrous oxide (N2O) |
|
|
|
| Purpose: 1.The medicine: immune regulating blood pressure, nerve transmission, physiological regulation and physiological function such as |
| inhibition of platelet aggregation |
| 2.Petrochemical fields: in the field of petrochemical industry to develop new applications, used in polymerization reaction termination |
| 3.Other areas: refrigerants, accelerant, preservatives, chemical raw materials, atomic absorption spectrometry using gas, semiconductor manufacturing |
| with equilibrium gas injection agent, oxidation, standard gas and smoke, vacuum pressure leak detection cassette agent, etc |
| The name of the gas |
specifications |
Impurity content(10-6) |
standard number |
| N2O |
99.9%/99.9995% |
CO≤5 CO2≤10 Halogen≤0.2 Moisture≤100 NO,NO2≤0.5 NH3≤5 |
CP2005 & Q/H3901-1999 |
| High purity helium(He) |
| Main application: used in the study of ultralow temperature, gas chromatography analysis, nonferrous metal welding, leak, chemical gas phase deposition, |
| crystal growth, the configuration of the plasma dry, special mixture, used as a standard gas, |
| gas balance,medical gas, inflatable balloon, tube, diving suits, etc. |
| The name of the gas |
specifications |
Impurity content(10-6) |
standard number |
| He |
100.00% |
Ne≤4 O2≤1.0 H2≤1 N2≤2 CO≤0.5 CO2≤0.5 CH4≤0.5 H2O≤3 |
GB/T48443-1995 |
| 100.00% |
Ne≤15 O2≤3 H2≤3 N2≤10 CO≤1 CO2≤1 CH4≤1 H2O≤10 |
GB/T48442-1995 |
| |
|
|
|
| High purity argon(Ar) |
|
|
|
| purpose: used for welding, stainless steel manufacturing, and smelting of nonferrous metals, also used in the semiconductor manufacturing process |
| inchemical vapor deposition, crystal sound field, strong oxidation, extension, diffusion, polysilicon, tungsten, ion implantation, sintering, etc.Used as a |
| standard gas, zero equilibrium gas, gas, gas chromatography carrier gas, etc |
| The name of the gas |
specifications |
Impurity content(10-6) |
standard number |
| Ar |
100.00% |
N2≤4 O2≤1 H2≤1 THC≤1 H2O≤2.6 |
GB/T4842-2006 |
| 100.00% |
N2≤5 O2≤2 H2≤1 THC≤2 H2O≤4 |
| |
|
|
|
| High purity carbon dioxide |
(CO2) |
|
|
| Purpose: laser, electronics industry, reactor coolant, scientific research, etc |
| The name of the gas |
specifications |
Impurity content(10-6) |
standard number |
| CO2 |
99.99% |
H2≤50 O2≤10 N2≤50 CO≤5 THC≤5 H2O≤15 |
The enterprise standard |
| 100.00% |
H2≤20 O2≤5 N2≤30 CO≤2 THC≤3 H2O≤8 |
| 100.00% |
H2≤5 O2≤1 N2≤3 CO≤0.5 THC≤2 H2O≤3 |
| |
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|
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| (1).On raw material processing: first we chromatographic purity test at the meeting, the purity standard again after unloading into the tank, before purification purification. |
| (2).Before filling: heating with the first step of the cylinder, the second step is to dry the moisture inside the cylinder, |
| the third step to open the cylinder calabash valve pumping air into vacuum state, the fourth step play 0.3 to 0.5 mpa raw material gas chromatography to test, test impurities, this step is to test both sides can enter thenext step aeration process. |
| (3).The cylinder after the above processing, filling in the filling line. |
|
|
| (4).After the completion of the filling: in each of the cylinders for purity test, purity is not qualified cylinders for processing, no shipment |
Company introduction:
NINGBO DSW INDUSTRY CO.,LTD established in 1998. we produce the following gas: 99.999% and 99.995% helium were 99.9% and 99.999%,
99.9% and 99.999% of the laughing gas, the carbon monoxide were 99.9993% and 99.999%, 99.9993% and 99.999% of argon gas, and 99.995%
hydrogen, 99.995% and 99.999% nitrogen, 99.999% and 99.99% were 99.999% and 99.995% and 99.999% of carbon dioxide, methane, 99.999%
and 99.998%, and 99.999% of the oxygen, or more than 99.9% of acetylene, and so on.
So far our products are enjoying good markets at home and exporting to Asia, Middle East ,South America and European and as well as West Africa.
Audited Supplier 
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