Is dilute sulfuric acid toxic?

I believe that anyone who has studied chemistry knows that sulfuric acid is highly corrosive, so we must be very careful when using sulfuric acid in our daily lives. There are also some explicit regulations when purchasing sulfuric acid with higher concentrations. Many friends are also worried about whether some diluted sulfuric acid will be harmful to the body? So is dilute sulfuric acid poisonous? Regarding this issue, please join me in taking a look at it in the next period of time.

It should be said that sulfuric acid itself (pure) has no odor. Moreover, sulfuric acid is not easily volatile at room temperature, so the statement about the smell of sulfuric acid does not seem to be accurate. But sulfuric acid is highly corrosive. It also has a strong reducing effect. Since I smelled a pungent odor, I thought it was at least a harmful gas (possibly other gases in the production process). Since it causes irritation, it will at least damage the nasal mucosa and seriously damage the respiratory tract and lungs. Pay attention to the labor protection measures in this regard.

Pure sulfuric acid is a transparent, colorless, odorless, oily liquid. Its color becomes darker or even black if there are impurities in it. Molecular formula H2SO4. Molecular weight: 98.08. Its relative density and freezing point also vary with its content. Relative density: 1.841 (96-98%). Freezing point: 10.35℃(100%), 3℃(98%), -32℃(93%), -38℃(78%), -44℃(74%), -64℃(65%). Boiling point 290℃. Vapor pressure 0.13 kPa (145.8°C). Has a great affinity for water. Absorbs moisture from air and organic matter. When mixed with water or alcohol, it generates a lot of heat and shrinks in volume. When diluting with water, add the acid to the dilution water to avoid splashing of the acid. Heated to 340℃, it decomposes into sulfur trioxide and water.

Dilute acids can react with many metals to release hydrogen. Concentrated acid is non-corrosive to lead and low-carbon steel and is a very strong acidic oxidant. It can burn or even explode when in contact with many substances, and can react with oxidants or reducing agents.

Sulfur trioxide has three allotropes: α, β, and γ. The most useful commercial form is the γ-form, which appears as ice-like crystals or liquids. Molecular formula: SO3. Molecular weight: 80.07. Relative density: 1.9224 (20℃). Melting point 16.8℃. Boiling point 44.8℃. Vapor pressure 57.72 kPa (25°C). The solubility in water is 100%. It dissolves in water to form sulfuric acid, and dissolves in concentrated sulfuric acid to form fuming sulfuric acid, releasing a large amount of heat. Anhydrous sulfur trioxide is non-corrosive to metals.

Firefighting measures

Extinguish with water, dry powder or carbon dioxide. Avoid spraying water directly into sulfuric acid as it may release a large amount of heat and burn the skin when it comes into contact with water. Firefighters must wear full body protective clothing and supplies to prevent burns.

Through the description of the above paragraphs, I believe that most of my friends have already had their own standard answers and clearer conclusions in their minds about whether dilute sulfuric acid is toxic. Of course, what I want to tell you is that in our daily lives we often hear about revenge incidents involving throwing sulfuric acid, so in our daily lives we must be careful around sulfuric acid, because if we accidentally get contaminated by it, there is a risk of disfigurement.