Physical Property — Definition, Formula, Properties & Uses | AllChemicals | AllChemicals

Also Known As	Physical characteristic, physical property, measurable property (physical)

What is Physical Property?

A characteristic of a substance that can be measured without changing its chemical identity. Physical properties include melting point, boiling point, density, color, and solubility. Intensive properties (like density) do not depend on amount; extensive properties (like mass) do.

Properties & Characteristics

A physical property is a characteristic of a substance that can be measured or observed without changing the substance's chemical identity. Physical properties include: melting point, boiling point, density, colour, crystal structure, hardness, solubility, refractive index, viscosity, conductivity, and specific heat. Some physical properties are intensive (independent of amount: density, colour, melting point) while others are extensive (depend on amount: mass, volume, heat capacity).

Uses & Applications

Physical properties are used in: substance identification (melting point, refractive index), quality control (purity assessment by melting point depression), materials characterisation (XRD, DSC, thermogravimetry), industrial process design (heat capacity for reactor thermal management), and in comparison tables to distinguish substances (physical property databases, NIST WebBook).

Safety Information

Physical properties guide safe handling: high vapour pressure → high evaporation rate → inhalation hazard; low flash point → high fire risk; high density gas → accumulation in low areas; viscous liquids → different spill behavior. Physical property data is essential for emergency response planning.

Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.

Key Facts

Term Physical Property

Index All "P" terms

Synonyms Physical characteristic, physical property, measurable property (physical)

Frequently Asked Questions

What is Physical Property?

A characteristic of a substance that can be measured without changing its chemical identity. Physical properties include melting point, boiling point, density, color, and solubility. Intensive properties (like density) do not depend on amount; extensive properties (like mass) do.

What is Physical Property used for?

Is Physical Property hazardous?

More "P" Terms

P-type Semiconductor Pairing Pairing Energy Palladium Pd Parachor [P] = M(γ)^(1/4) / (ρ_L - ρ_V) Paramagnetic χ_m > 0; unpaired electrons; μ = √(n(n+2)) BM (n = unpaired electrons) Paramagnetism Partial Ionic Character % ionic = (1 - e^(-Δχ²/4)) × 100% Partial Pressure Partial Pressure p_i = x_i × P_total; P_total = Σp_i Particulate Matter Parts Per Million ppm = mg/L (water) or mg/kg; = (mass solute/mass solution) × 10⁶

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