sulfur dioxide

sulfur dioxide | Definition, Sources, & Uses | Britannica

Sulfur dioxide is a precursor of the trioxide (SO 3) used to make sulfuric acid. In the laboratory the gas may be prepared by reducing sulfuric acid (H 2 SO 4) to sulfurous acid (H 2 SO 3 ), which decomposes into water and sulfur dioxide, or by treating sulfites (salts of sulfurous acid) with strong acids, such as hydrochloric acid, again ...

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Sulfur Dioxide (SO2) Pollution | US EPA

May 04, 2021· Sulfur Dioxide (SO2) Pollution. SO 2 results from the burning of either sulfur or materials containing sulfur. Sulfur Dioxide (SO 2) is one of a group of gases called sulfur oxides (SO x ). The other gases in the group are much less common in the atmosphere .

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Sulfur dioxide ≥% | 7446-09-5

Sulfur dioxide is primarily used as a feedstock for the production of sulfuric acid (contact process). It is generally used in the synthesis of a variety of sulfur-containing organic compounds like alkyl/aryl sulfonyl chlorides, sulfinates, sultines, and polysulfone.

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Sulfur Dioxide | American Lung Association

Feb 12, 2020· Sulfur dioxide (SO 2) is a gaseous air pollutant composed of sulfur and oxygen. SO 2 forms when sulfur-containing fuel such as coal, oil, or diesel is burned. Sulfur dioxide also converts in the atmosphere to sulfates, a major part of fine particle pollution in the eastern

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Sulfur Dioxide (SO CAS 7446-09-5; UN 1079

Sulfur dioxide dissolves in water or steam to form sulfurous acid. Liquid sulfur dioxide corrodes iron, brass, copper, and some forms of plastic and rubber. Many metals, including zinc, aluminum, cesium, and iron, incandesce and/or ignite in unheated sulfur dioxide. Sulfur dioxide reacts explosively when it comes in contact with sodium hydride.

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Sulfur Dioxide - an overview | ScienceDirect Topics

Sulfur dioxide is a colorless gas (a liquid below −10 °C or under pressure) with a characteristic, pungent odor, more soluble in cold than in hot water. In moist environments, sulfurous acid, which reacts slowly with oxygen, is formed. This reaction is accelerated at increasing pH values. Sulfur dioxide gas is a corrosive and severe irritant.

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Sulfur Dioxide : OSH Answers

Aug 06, 2021· CAS Registry No.: 7446-09-5 Other Names: Sulphur dioxide, SO 2 Main Uses: To make sulfuric acid, intermediate in bleaching processes, in food processing. Appearance: Colourless gas. Odour: Suffocating Canadian TDG: UN1079

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What is in Your Food? Sulfur Dioxide - Chronicles in Health

Aug 26, 2020· Sulfur dioxide is one of the chemicals of greatest concern in our air. The largest source of sulfur dioxide is from the burning of fossil fuels by power plants and other industrial facilities. Exposure to sulfur dioxide can harm the respiratory system, making breathing difficult so you might wonder why would it be in our food? It is a preservative for processed foods.

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Sulfur Dioxide | Wisconsin Department of Health Services

Apr 02, 2018· Sulfur dioxide, SO2, is a colorless gas or liquid with a strong, choking odor. It is produced from the burning of fossil fuels (coal and oil) and the smelting of mineral ores (aluminum, copper, zinc, lead, and iron) that contain sulfur. Sulfur dioxide dissolves easily in water to form sulfuric acid. Sulfuric acid is a major component of acid ...

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Sulfur dioxide - CDC

Sulfur dioxide. In: Hygienic guide series. Am Ind Hyg Assoc Q 16:332-333. 2. Alarie Y [1981]. Dose-response analysis in animal studies: prediction of human responses. Environ Health Perspect 42:9-13. 3. Flury F, Zernik F [1935]. Zusammenstellung der toxischen und letalen dosen für die gebräuchlichsten gifte und versuchstiere.

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Sulfur Dioxide Handling Manual - Hydro Instruments

Sulfur dioxide’s primary health concern is that it will attack the lungs, mucous membranes and the eyes, and the skin leading to severe injury or death. Sulfur dioxide’s odor is strong enough that it can be detected at levels around 3-5 ppm but some symptom have been reported to occur around levels of 1 ppm. Symptoms of

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SULFUR DIOXIDE | CAMEO Chemicals | NOAA

SULFUR DIOXIDE is acidic. Reacts exothermically with bases such as amines, amides, metal oxides, and hydroxides. Frequently used as a reducing agent although it is not a powerful one. Acts as a reducing bleach to decolorize many materials. Can act as an oxidizing agent.

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