What Is Fuming Sulfuric Acid?

Fuming sulfuric acid, which is a sulfuric acid solution of sulfur trioxide. Colorless to light brown viscous fuming liquid, its density, melting point and boiling point vary with different SO ₃ content. When it is exposed to the air, the volatilized SO ₃ and water vapor in the air form fine dew drops of sulfuric acid and emit smoke, so it is called fuming sulfuric acid.

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Fuming sulfuric acid is a product in the process of producing sulfuric acid. It is unstable in nature and reacts with water to form sulfuric acid. Fuming sulfuric acid can be regarded as sulfuric acid with a concentration of more than 100%, and SO3 is volatilized and formed in the air.

Vulcanization and

Operation : Closed operation, pay attention to ventilation. Operations are as mechanized and automated as possible. Operators must be specially trained and strictly abide by the operating procedures. It is recommended that the operator wear a self-absorption filtering gas mask (full face mask), wear rubber acid and alkali resistant clothing, and rubber acid and alkali resistant gloves. Keep away from flammable and combustible materials. Prevent vapors from leaking into the workplace air. Avoid contact with alkalis, active metal powder,

First aid measures for fuming sulfuric acid

Skin contact: Remove contaminated clothing immediately and rinse with plenty of running water for at least 15 minutes. Seek medical attention.

Eye contact: Raise the eyelids immediately and rinse thoroughly with plenty of running water or saline for at least 15 minutes. Seek medical attention.

Inhalation: Quickly leave the scene to fresh air. Keep your airways open. If breathing is difficult, give oxygen. If breathing stops, give artificial respiration immediately. Seek medical attention.

Ingestion: Rinse mouth with water and drink milk or egg white. Seek medical attention.

Fuming sulfuric acid fire protection measures

Hazardous characteristics: Excessive heat generation in the presence of water can cause boiling splashes. Contact with flammable materials (such as benzene) and combustible materials (such as sugar, cellulose, etc.) can cause severe reactions and even cause combustion. When it reacts violently with calcium carbide, perchlorate, arsenate, nitrate, picrate, metal powder, etc., an explosion or combustion occurs. It can react with common metals, emit hydrogen and form explosive mixtures with air. Strongly corrosive and absorbent.

Fire extinguishing methods: Firefighters must wear whole body acid and alkali resistant fire protective clothing. Fire extinguishing agent: dry powder, carbon dioxide, sand. Avoid the impact of water on the object, so as to prevent the skin from being burned by spraying a lot of heat.

Fuming sulfuric acid leakage treatment

Emergency treatment: quickly evacuate personnel from the leaked contaminated area to a safe area, and immediately isolate 150m, and strictly restrict access. It is recommended that emergency handlers wear self-contained positive-pressure respirators and acid- and alkali-proof work clothes. Do not touch the spill directly. Cut off the source of the leak if possible. Small leaks: Sprinkle soda ash on the ground, rinse with plenty of water, and dilute the water into the waste water system. Large spills: build dikes or dig pits for containment. Clear under expert guidance.