Sulfur Dioxide

Sulfur Dioxide General Sulfur dioxide (SO 2) is a colorless, nonflammable gas with a pungent odor that is detectable by the human nose. On a worldwide basis, SO 2 is considered one of the major pollution problems. Man-made emissions of SO 2 account for about one-third of the total emissions of sulfur compounds in the atmosphere.

Sulfur Dioxide | Wisconsin Department of Health Services

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 rain.

Poison Fact Sheet: Sulfur Dioxide

Properties of the Chemical Sulfur dioxide (SO. 2. ) is a colorless, nonflammable gas with a strong, suffocating odor. It condenses at -10 degrees at ordinary pressure to form a colorless liquid. It is sometimes referred to as sulfurous anhydride or sulfurous oxide. When sulfur dioxide comes in contact with water, it forms sulfurous acid.

CDC

Sulfur dioxide. Colorless gas with a characteristic, irritating, pungent odor. [Note: A liquid below 14°F. Shipped as a liquefied compressed gas.] Powdered alkali metals (such as sodium & potassium), water, ammonia, zinc, aluminum, brass, copper [Note: Reacts with water to form sulfurous acid (H 2 SO 3 ).] NIOSH.

TOXICOLOGICAL PROFILE FOR SULFUR DIOXIDE

Sulfur dioxide is a colorless gas with a pungent odor. It is a liquid when under pressure. Sulfur dioxide dissolves in water very easily. It cannot catch fire. Sulfur dioxide in the air results primarily from activities associated with the burning of fossil fuels

Sulfur Dioxide

Sulfur dioxide exists in both gas and liquid forms. Sulfur dioxide gas is a common component of smog, but in concentrations likely too low to cause significant eye irritation. 8 Sulfur dioxide gas has a pungent smell and is irritating to the respiratory tract at concentrations lower than those that cause eye irritation. Exposure to sulfur ...

Solved! What to Do About a Sulfur Smell in the House

1. Check your drainpipes. If you have a shower, tub, or sink that gets minimal use, the odor could be caused by sewer gas filtering into your home through an empty plumbing trap. Sewer gas ...

Sulfur Oxides | Center for Science Education

Sulfur dioxide is the most dangerous of the sulfur oxides. It is a colorless gas that smells like burnt matches. Sulfur trioxide is often a colorless or white solid that creates white fumes in the air and has strong reactions with water. Both sulfur dioxide and sulfur trioxide react to form sulfuric acid, which is toxic to living tissue and is ...

HEALTH EFFECTS

In 10 healthy, nonasthmatic individuals, exposure to sulfur dioxide (via a chamber) at concentrations of up to 1.0 ppm for up to 40 minutes was associated with only a slight increase in subjective, mild, upper-respiratory symptoms such as sore throat and ability to taste and smell sulfur dioxide (Schachter et al. 1984). There was no effect on ...

Sulfur Dioxide Basics | US EPA

EPA's national ambient air quality standards for SO 2 are designed to protect against exposure to the entire group of sulfur oxides (SO x ). SO 2 is the component of …

PUBLIC HEALTH STATEMENT

WHAT IS SULFUR DIOXIDE? Sulfur dioxide is a colorless gas with a pungent odor. It is a liquid when under pressure. Sulfur dioxide dissolves in water very easily. It cannot catch fire. Sulfur dioxide in the air results …

Sulfur Dioxide | Encyclopedia

Sulfur Dioxide. Sulfur dioxide, with chemical formula SO 2, is a colorless gas with an irritating, choking odor.Normally a gas, sulfur dioxide has a density of 2.551 g/L and a solubility in water of 9.4 g per 100 mL (at 25 ° C). It has a melting point of − 98.3 ° F (− 72.4 ° C) and a boiling point of 14 ° F (− 10 ° C).. Sulfur dioxide is produced …

Sulfur Dioxide Emissions from Engines: Causes, Impacts, and …

Understanding Sulfur Dioxide. Sulfur dioxide is a compound that plays a significant role in our environment and has various industrial applications.In this section, we will explore what sulfur dioxide is, whether it is a gas, and its uses.. What is Sulfur Dioxide? Sulfur dioxide (SO2) is a colorless gas with a pungent odor. It is composed of …

Sulfur Dioxide Effects on Health

Sulfur dioxide (SO 2) is a colorless, reactive air pollutant with a strong odor. This gas can be a threat to human health, animal health, and plant life. The main sources of sulfur dioxide emissions are …

Oxides of Sulphur (SO2 & SO3)

2 Hg2Cl2+ SO2 +4HCl → 4HgCl2+ 2H20 + S. It combines with O2 in the presence of platinised asbestos at 723 K or in the presence of V 2 O 5 at 773 K to give SO 3. 2 SO2+ O2 → 2 SO3. It reacts with Cl2 in the presence of charcoal as a catalyst to form sulphuryl chloride SO 2 Cl 2. SO2 + Cl2 → SO2Cl2.

Right to Know Hazardous Substance Fact Sheet

Sulfur Dioxide is a colorless gas with a strong, irritating odor, that is often shipped as a liquid under pressure. It is used as a bleaching agent, refrigerant, and solvent, and occurs as an off- ... Sulfur Dioxide, (2) while wearing particulate filters abnormal resistance to breathing is experienced, or (3) eye irritation

Sulfur Dioxide | Toxicological Profile | ATSDR

For more information, contact: Agency for Toxic Substances and Disease Registry. Office of Innovation and Analytics, Toxicology Section. 4770 Buford Highway. Chamblee, GA 30341-3717. Phone: 1-800-CDC-INFO 888-232-6348 (TTY) Email: Contact CDC-INFO. ATSDR can also tell you the location of occupational and environmental health clinics.

Frequently Asked Questions (FAQ) | Environmental Odors

Sulfur dioxide (SO 2). Sulfur dioxide is the only regulated air pollutant with a strong, pungent odor. Under the Clean Air Act, EPA must control 187 hazardous air pollutants, also known as toxic air pollutants or air toxics. EPA controls those chemicals for their toxicity, not for their odor.

Sulfur Dioxide | Formula, Properties & Application

Chemical Formula: The chemical formula for sulfur dioxide is SO 2, indicating it comprises one sulfur atom and two oxygen atoms. Physical State: At room temperature, sulfur dioxide exists as a colorless gas. It can be converted to a liquid under pressure or low temperatures. Smell and Taste: Sulfur dioxide has a pungent, irritating odor akin to ...

SULFUR DIOXIDE | CAMEO Chemicals | NOAA

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. Used to manufacture chemicals, in paper pulping, in metal and food processing.

Sulfur Dioxide and Some Sulfites, Bisulfites and Metabisulfites

Sulfur dioxide and sulfites are reduced by zinc in a hydrochloric acid solution to hydrogen sulfide, which is readily detected by its smell. Sulfur dioxide can be determined chemically by iodometry, titrimetry, gravimetry or colorimetry ( Sander et al., 1984 ).

SULFUR DIOXIDE | Occupational Safety and Health Administration

Colorless gas with a characteristic, irritating, pungent odor. Boiling point 14°F Molecular weight 64.1 Freezing point/melting point-104°F Vapor pressure: 3.2 atm ... Use this method when sampling for both hydrogen sulfide and sulfur dioxide. Sulfur trioxide and gaseous elemental sulfur can cause a positive interference.

What does Sulphur dioxide smell like? – Sage-Answer

What does sulfur dioxide look like? 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.

Sulfur dioxide | Minnesota Pollution Control Agency

Sulfur dioxide. Sulfur dioxide (SO2), a foul-smelling toxic gas, is part of a larger group of chemicals called sulfur oxides. These gases, especially SO2, are emitted by the burning of fossil fuels or other materials that contain sulfur. Sulfur dioxide can damage trees and plants, inhibit plant growth, and damage sensitive ecosystems and waterways.

ATSDR Sulfur Dioxide ToxFAQs

Sulfur dioxide is a colorless gas with a pungent odor. It is a liquid when under pressure, and it dissolves in water very easily. Sulfur dioxide in the air comes mainly from activities such as the burning of coal and oil at power plants or from copper smelting. In nature, sulfur dioxide can be released to the air from volcanic eruptions.

Sulfur Dioxide | NIOSH | CDC

CAS No. . Sulfur dioxide (SO₂) is a colorless gas with a characteristic, irritating, pungent odor. Exposure to sulfur dioxide may cause irritation to the eyes, nose, and throat. Symptoms include: nasal mucus, choking, cough, and reflex bronchi constriction, and when liquid: frostbite … See more

Sulfur Dioxide Acute Exposure Guideline Levels

Sulfur dioxide is a colorless gas at ambient temperature and pressure. It can be detected by taste at concentrations of 0.35-1.05 ppm and has a pungent, irritating odor with an odor threshold of 0.67-4.75 ppm.