Sulfur dioxide (also sulphur dioxide) is the chemical compound with the formula SO2. It is a toxic gas with a pungent, irritating smell, that is released by volcanoes and in various industrial processes. Since coal and petroleum often contain sulfur compounds, their combustion generates sulfur dioxide unless the sulfur compounds are removed before burning the fuel. Furtheroxidation of SO2, usually in the presence of a catalyst such as NO2, forms H2SO4, and thus acid rain. Sulfur dioxide emissions are also a precursor to particulates in the atmosphere. Both of these impacts are cause for concern over the environmental impact of these fuels.
Sulfur dioxide is an intermediate in the production of sulfuric acid, being converted to sulfur trioxide, and then to oleum, which is made into sulfuric acid. Sulfur dioxide for this purpose is made when sulfur combines with oxygen. The method of converting sulfur dioxide to sulfuric acid is called the contact process.
Sulfur dioxide is sometimes used as a preservative for dried apricots, dried figs, and other dried fruits owing to its antimicrobial properties, and it is sometimes calledE220 when used in this way. As a preservative, it maintains the colorful appearance of the fruit and prevents rotting. It is also added to sulfured molasses.
Sulfur dioxide is an important compound in winemaking, and is designated as parts per million in wine.
Sulfur dioxide exists in wine in free and bound forms, and the combinations are referred to as total SO2.
Wuhan Newradar Trade Company Limited was established in 2007 with the help of professionals from abroad who has more than 25 years experience in gas industry. We introduced the gas products with high quality, advanced technology services and philosophy of quality management from America.
The main products are high-purity gases, industrial gases, gases with fluorocarbon, rare gases, excimer laser gases, isotopic gases, mixed gases and electrical gases.
We continuously strengthen internal management, optimize the process of customer service, innovate the pattern of customer service and improve the quality of customer service with the service concept of “focus on customer needs and providing fast service”. We are trying to achieve rapid development of the company in order to become one of the major import and export companies in the gas industry.
1. What's your product price?
Because each gas price is depends on the market supply and demand, quantity and
purity, it is difficult to give a fixed price. If you have any interested in each gas, pls give
your details requirement. I could like to make an offer to you.
2. What’s the min order?
Different products have different min order. Please don’t hesitate to let me know your
3. What’s the delivery time?
If the cylinder is in the stock, and only need to fill gas, the delivery is about 7-10 days
ex work after receive the deposit.
If the cylinder need to customize, the delivery is about 15-35 days ex work after receive
the deposit. That is depends on the quantity.
4. How to check the gas quality?
Firstly, our cylinder will take a treatment (cleaning, drying, vacuum pumping, and
replacement before filling gas. In this way, the cylinder inside is clear and dry.
Secondly, we will take tests every treated cylinder to assure them inside purity. Thirdly,
we will take a test for all of the gas after fill into cylinders. If the tested gas is not up to
standard, we will produce it again and not release the faulty product to ex work. At last,
we will supply you the gas test qualified report .
5. All the cylinders can recycle?
Usually seamless steel cylinder can recycle to use in 20 years. The disposable cylinder
is only for use one time.
6. Shall we send back the cylinders to China to refill gas again?
Yes, when you ordered our cylinders, next time, you can send back the cylinders to fill
gas again. You just need to tell us before you export. We will handle all the import
customs clearance formalities.