Preservative Sulfur Dioxide - China

Sulfur dioxide is a toxic gas with a pungent, irritating smell, that is

released by volcanoes and in various industrial processes.

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.

Several billion kilograms are produced

annually for this purpose.

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 called E220

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, E number: E220 - Sulfur

dioxide is also a good reductant.

In the presence of water, sulfur

dioxide is able to decolorize substances.

Specifically it is a useful

reducing bleach for papers and delicate materials such as clothes.

This

bleaching effect normally does not last very long.

Being easily condensed

and possessing a high heat of evaporation, sulfur dioxide is a candidate

material for refrigerants.

Prior to the development of CFCs, sulfur

dioxide was used as a refrigerant in home refrigerators.

Company Contact:

• Posted By: Central China Special Gas Co., Ltd.

• Phone: 867348755678

• Address: Jiefang Rd, Hengyang , China

• Email:

• Website: http://www.ccsg.cn

• Business Description: Central China Special Gas (CCSG) Co., Ltd is specialized on gas
  
  industry; our main product is industrial gases, specialty gases, gases
  
  equipments.
  
  With Chinese booming economy, CCSG now is one of the most
  
  active player on industrial and specialty gas in China.
  
  CCSG's products
  
  including:
  
  
  
  Fluorogases: SF6, HF, CHF3, CF4, C2F6, C3F8, C4F8
  
  Hydrocarbons: CH4, C2H4, C2H6, C3H6, C3H8
  
  Rare gases: Helium, Neon, Argon, Krypton, Xenon
  
  Calibration Standard Gases, mixtures
  
  Other gases: D2, CO, H2, SO2, Cl2, HCL, N2O, NO, NO2.