Sulfuric acid is extremely corrosive, especially in high concentrations. High concentration of sulfuric acid is not only strongly acidic, but also has a strong dewatering and oxidizing properties: in addition to the proteins and fats in the flesh and hydrolysis reaction and cause serious chemical burns, it will also be highly exothermic dewatering reaction with carbohydrates and carbonize them, resulting in second-degree flammable burns, and cause great damage to the eyes and flesh.
Health Hazards: Strongly irritating and corrosive to skin, mucous membranes and other tissues. Vapor or fog can cause conjunctivitis, conjunctival edema, corneal clouding to blindness; cause respiratory tract irritation, respiratory distress and pulmonary edema in severe cases; high concentrations cause laryngeal spasm or vocal edema and death by suffocation.
Oral administration causes burns in the digestive tract to the point of ulcer formation; in severe cases, there may be gastric perforation, peritonitis, renal damage, shock, and so on. In severe cases, there may be gastric perforation, peritonitis, kidney damage, shock, etc. Skin burns can cause erythema, ulcers, and contraction of eschars after healing. Splashing into eyes may cause burns, even corneal perforation, total ophthalmia and even blindness. The chronic effects: dental erosion, chronic bronchitis, emphysema and pulmonary sclerosis.
Environmental hazards: Hazardous to the environment, can cause pollution of water and soil.
Hazard of ignition and explosion: This product is inflammatory, highly corrosive, highly irritating, can cause burns and flesh carbonization.
Expanded Information:
Strong corrosive
Concentrated sulfuric acid has a strong corrosive, if the experiment is accidentally splashed on the skin or clothes, should be immediately rinsed with a large amount of water, not only to reduce the concentration of sulfuric acid in the skin stays in the time, but also in the first time diluted Concentrated sulfuric acid can not only reduce the time it stays on the skin, but also dilute it in the first time to reduce the harm to the human body, and even if it is dissolved in water, there will be heat released.
But a large number of facts have proved that rinsing running water will take away the heat, the heat generated by the human body almost no effect (remember not to use a cloth to wipe, because the concentrated sulfuric acid has a strong dehydrating, after contact with the skin will make it charcoal, with a cloth will be wiped out of the skin tissues. (However, if you need to answer on the test paper, the content of the textbook will prevail).
Then apply a 3% to 5% solution of sodium bicarbonate (never use a strong base such as sodium hydroxide). Serious cases should be sent to the hospital immediately. If it drips on the desktop during the experiment, just wipe it dry with a cloth.
Hydroabsorption
When a bottle of concentrated sulfuric acid is placed in the air with an open mouth, its mass will increase, its density will decrease, its concentration will decrease, and its volume will become larger, this is because concentrated sulfuric acid is hydroabsorbent, and it can adsorb water in the air.
Often used as a desiccant. Concentrated sulfuric acid is often used as a gas washing device, concentrated sulfuric acid familiar in addition to being able to absorb water in the air, but also can dry neutral and acidic gases
For example, neutral gases: CO, oxygen, nitrogen, and all rare gases
Acidic gases: HCI gases, carbon dioxide
Concentrated sulfuric acid can not be used as a gas washing device for alkaline gases (e.g., ammonia), because concentrated sulfuric acid and ammonia.
Concentrated sulfuric acid cannot be used to dry reducing gases such as hydrogen bromide, hydrogen iodide and hydrogen sulfide.
Concentrated sulfuric acid cannot actually dry sulfur dioxide because sulfur dioxide is soluble in concentrated sulfuric acid.
Baidu Encyclopedia - Sulfuric Acid
Baidu Encyclopedia - Concentrated Sulfuric Acid