PhysProps usually refers to one of two major tools in chemical engineering and environmental science: the SRC PHYSPROP Database or the G&P PhysProps Software. 1. The SRC PHYSPROP Database
Maintained by Syracuse Research Corporation (SRC), this is a highly regarded scientific database focused on environmental chemistry and chemical safety.
The Scope: It contains chemical structures, names, and physical properties for over 41,000 chemicals.
Regulatory Integration: It serves as the underlying backbone for the U.S. EPA’s EPI Suite™ (Estimation Programs Interface) and ECOSAR software. Environmental researchers use it extensively to benchmark machine learning models.
Key Properties Tracked: It features up to 13 critical environmental fate properties, including: Melting and boiling points Water solubility Vapor pressure Octanol-water partition coefficient ( Henry’s law constant pKa (acid dissociation constant)
Data Sources: It utilizes a mix of validated experimental data, extrapolated data, and calculated/estimated values. 2. G&P Engineering PhysProps Software
Developed by G&P Engineering Software, this is a commercial thermodynamic and physical property application built for Windows systems.
The Scope: It functions as a pure-component database containing over 6,500 chemical species and their synonyms, covering both organic and inorganic compounds.
Functionality: It tracks 28 specific physical properties per compound.
Property Estimation: If a chemical is missing from its library, the software includes built-in standard estimation techniques to predict 18 different properties automatically.
Target Audience: It is designed primarily for chemical engineers, process designers, and students who need quick access to thermophysical properties without launching massive, expensive process simulation packages. Comparison at a Glance SRC PHYSPROP Database G&P PhysProps Software Primary Focus
Environmental fate, toxicological profiling, and chemical hazards.
Process engineering, thermodynamic calculations, and transport data. Chemical Count 41,000+ compounds. 6,500+ compounds. Common Use Bundled with government tools like the EPA EPI Suite.
Standalone engineering desktop tool for pure component lookups.
Could you tell me if you are looking at this from an environmental/regulatory angle or a chemical engineering/process design angle? I can provide specific steps on how to download, access, or query the data for either version. Scientific Databases – Environmental Chemistry – SRC, Inc.