concentrated sulfuric acid

Be careful to avoid getting burned.

Prevent skin contact with sulfuric acid, and pay attention to corrosion protection of the equipment. When carrying out welding repairs on storage tanks that have held sulfuric acid, it is necessary to exhaust the air first to avoid residual hydrogen, and in winter, prevent sulfuric acid from crystallizing in the pipes.

■Hazard Overview ◆ Health hazards: It has a strong irritating and corrosive effect on tissues such as the skin and mucous membranes. Steam or fog can cause conjunctivitis, conjunctival edema, and corneal opacity, leading to blindness ； It causes respiratory irritation, and in severe cases, it leads to difficulty breathing and pulmonary edema ； High concentrations can cause laryngospasm or glottic edema, leading to death by asphyxiation. Oral administration causes digestive tract burns leading to ulcer formation ； In severe cases, there may be gastric perforation, peritonitis, kidney damage, shock, etc. In mild cases of skin burns, redness appears; in severe cases, ulcers form. After healing, scar contraction can affect function. If it gets into the eyes, it can cause burns, and even corneal perforation, panophthalmitis, and blindness. Chronic effects: tooth erosion, chronic bronchitis, emphysema, and pulmonary sclerosis. 　　Environmental hazards: It is harmful to the environment and can pollute water bodies and soil. 　　◆Fire and explosion hazard: This product acts as an accelerant; it is highly corrosive and irritating, and can cause burns to the human body. 　　■Handling and Disposal: Perform operations in a closed environment, ensuring proper ventilation. Operate as mechanically and automatically as possible. Operators must receive specialized training and strictly adhere to operating procedures. It is recommended that operators wear self-priming filter-type gas masks (full-face masks), rubber acid- and alkali-resistant clothing, and rubber acid- and alkali-resistant gloves. Stay away from sources of fire and heat; smoking is strictly prohibited in the workplace. Keep away from flammable and combustible materials. Prevent steam from leaking into the workplace air. Avoid contact with reducing agents, alkalis, and alkali metals. Handle with care during transportation to prevent damage to the packaging and containers. Equipped with appropriate types and quantities of fire-fighting equipment and emergency response devices for leaks. Empty containers may still contain harmful substances. When diluting or preparing solutions, the acid should be added to water to avoid boiling and splashing. 　　■Storage 　　　Store in a cool, well-ventilated warehouse. The storage temperature should not exceed 35°C, and the relative humidity should not exceed 85%. Keep the container sealed. It should be stored separately from flammable materials, reducing agents, alkalis, alkali metals, and food chemicals; mixed storage is strictly prohibited. The storage area should be equipped with emergency spill response equipment and appropriate containment materials. 　　■Waste disposal: Method of waste disposal: Slowly add the alkaline solution–lime water while stirring continuously; after the reaction stops, pour large amounts of water into the wastewater system. 　　Precautions for disposal: 　　■ Transport-related precautions 　　◆ Hazardous goods code: 81007 　　◆ UN number: 1830 　　◆ Packaging category: O51 　　◆ Packaging method: Acid-resistant jars or ceramic bottles placed in ordinary wooden boxes or semi-grilled wooden boxes ； Plain wooden box outside the frosted-mouth glass bottle or threaded-mouth glass bottle. 　　◆Transportation notes: For railway transportation of this product, it must be shipped in steel tank cars owned by the enterprise itself; approval from the relevant authorities is required prior to shipment. When transporting by rail without use of containers, loading must be carried out strictly in accordance with the dangerous goods stowage table specified in the Ministry of Railways’ Rules for the Transport of Dangerous Goods. The packaging must be intact at the time of shipment, and the loading should be secure. During transportation, it is necessary to ensure that the container does not leak, collapse, fall, or get damaged. It is strictly prohibited to mix or transport it together with flammable or combustible materials, reducing agents, alkalis, alkali metals, food chemicals, etc. Transportation vehicles should be equipped with emergency equipment for dealing with leaks during transport. During transportation, it should be protected from exposure to sunlight and rain, as well as high temperatures. When transporting by road, follow the designated routes and do not stop in residential areas or densely populated zones.

When storing concentrated sulfuric acid, its temperature must not be high

1. Acid-resistant protective gear must be worn during operation to avoid skin contact； 2. If a small amount of sulfuric acid gets on the skin, rinse it immediately with plenty of water ； 3. When diluting sulfuric acid, under no circumstances should water be added to the sulfuric acid. A large amount of heat is released when diluting sulfuric acid, so this factor must be taken into full consideration when preparing it. 4. If a sulfuric acid container leaks, cover it with sand first, and then rinse it with plenty of water.

When concentrated sulfuric acid comes into contact with the skin, it is important not to rinse it with large amounts of water. First, dry the acid with a cloth before rinsing it with water, as diluting concentrated sulfuric acid releases a large amount of heat, which can easily cause burns to the skin.

When diluting, the acid should be poured into the water, and stirring must be continued constantly