Physical Properties of Concentrated Sulfuric Acid

Description

Appearance: Colorless, oily liquid, sometimes slightly yellow due to impurities.
Odor: No obvious odor.
Density: About 1.84 g/cm³ (at 20°C).
Melting Point: Approximately 10.4°C.
Boiling Point: Approximately 290°C.
Solubility: Miscible with water in any ratio; mixing with water releases a large amount of heat.
Hygroscopicity: Extremely strong hygroscopicity; can absorb moisture from the air.
Viscosity: High viscosity, flows less easily than water.
Volatility: Low volatility, not easy to evaporate at room temperature.
Dehydrating Ability: Very strong dehydrating ability; can carbonize organic substances (such as sugar, paper, wood, etc.).
Electrical Conductivity: Pure sulfuric acid has poor conductivity; conductivity increases upon dilution.
The CAS number of concentrated sulfuric acid is: 7664-93-9