Parachor
| Formula / Notation | [P] = M(γ)^(1/4) / (ρ_L - ρ_V) |
|---|---|
| Also Known As | Sugden parachor, molecular parachor, parachor value |
What is Parachor?
The parachor is a physico-chemical quantity that relates the surface tension of a liquid to its density, introduced by Sugden (1924). It is approximately constant and additive for different parts of a molecule, making it useful for predicting molecular structure. The parachor [P] = M × (γ)^(1/4) / (ρ_L − ρ_V), where M = molecular weight, γ = surface tension, ρ_L = liquid density, ρ_V = vapor density.
Formula & Notation
Other Names / Synonyms: Sugden parachor, molecular parachor, parachor value
Properties & Characteristics
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
The parachor is a physico-chemical quantity that relates the surface tension of a liquid to its density, introduced by Sugden (1924). It is approximately constant and additive for different parts of a molecule, making it useful for predicting molecular structure. The parachor [P] = M × (γ)^(1/4) / (ρ_L − ρ_V), where M = molecular weight, γ = surface tension, ρ_L = liquid density, ρ_V = vapor density.
Estimating surface tension of organic liquids. Predicting molecular structure from physical data. Chemical structure elucidation (historical). Lubricant and surfactant research. Quality control of organic compounds.
Calculation method — no direct safety concerns.
The formula or notation for Parachor is: [P] = M(γ)^(1/4) / (ρ_L - ρ_V)