You can check the \"Handbook of Properties of Chemical and Chemical Engineering Substances\" (organic volume), or you can also visit the following websites that provide information on key physical properties of chemicals: 1. Chemical Engineer Resources homepage – This site is maintained by Christopher M.A. Haslego, an alumnus of West Virginia University. This homepage offers a wealth of content related to chemical engineering, including some excellent websites for finding property data: (http://www.cheresources.com/physinternetzz.shtml). 1.1 Property Data: (http://www.cheresources.com/data.xls) This is a browsing-based database that contains property data for over 470 pure substances, such as molecular weight, freezing point, boiling point, critical temperature, critical pressure, critical volume, critical compressibility, asymmetry parameter, liquid density, dipole moment, heat capacity of the gas phase, heat capacity of the liquid phase, liquid viscosity, standard reaction enthalpy, vapor pressure, and enthalpy of vaporization. 1.2 Database of Physical Properties of Polymers and Macromolecules (http://funnelweb.utcc.utk.edu/~athas/da tabank/intro.html) This is a browsing database. Physical property data of more than 200 linear macromolecules, such as melting temperature, glass transition temperature, heat capacity, etc. This site provides not only physical properties but also software for estimating the physical properties of materials, such as PhysProps from G&P Engineering and Prode’s ThermoPhysical Properties Generator (PPP). 1.3 http://www.questconsult.com/~jrm/thermot.html This site provides thermodynamic properties for 294 different components; it also allows for the calculation of properties of pure components or mixtures using the Peng-Robinson equation of state – including data such as phase diagrams for gas-liquid states, densities of liquids and gases, enthalpy, heat capacity, critical values, and molecular weight. 1.4 http://www.gpengineeringsoft.com/ G&P Engineering is a software that provides 28 physical properties of substances and estimates 18 other physical properties. 2 Database developed by the **National Institute of Standards and Technology in the United States 2.1 Standard reference database: Chemical WebBook (http://webbook.nist.gov/chemistry/) This is a retrieval-based database with a very simple search mechanism; searches can be performed using the name of a chemical substance, molecular formula, partial molecular formula, CAS registry number, structure or partial structure, ionization energy properties, vibrational and electronic energies, molecular weight, and function. The data that can be retrieved includes molecular formula, molecular weight, chemical structure, synonyms, CAS registry number, thermodynamic data for the gas phase, thermodynamic data for the condensed phase, heat capacity at constant pressure in the liquid state, heat capacity at constant pressure in the solid state, phase transition data, enthalpy of vaporization, enthalpy of sublimation, enthalpy of combustion, entropy of combustion, thermodynamic data for various reactions, solubility data, ionization energy data in the gas phase, gas-phase infrared spectra, mass spectra, ultraviolet/visible spectra, vibrational/electronic energies, as well as references. 2.2 NIST Physics Web Book (http://physics.nist.gov/) This site includes databases of physical property constants, atomic spectroscopy data, molecular spectroscopy data, ionization data, X-ray and gamma-ray data, radiometric data, nuclear physics data, and other databases. 3 ChemFinder (chemfinder.com/’ target=_blank>http://www.chemfinder.com/) The ChemFinder chemical search tool is a database that can be used free of charge after registration; it is currently the most comprehensive resource available online for data on the properties of compounds. Search can be performed using the molecular formula, chemical name, molecular weight, or structural fragments of the compound. The search results include synonyms for the compound, structural diagrams, and physical properties such as melting point, boiling point, evaporation rate, flash point, refractive index, CAS registry number, specific gravity, vapor density, water solubility, and other characteristics. The database currently contains data on 75,000 compounds, including detailed information on thousands of the most common compounds. It is easy and simple to use. 4 Sigma-Aldrich manual (http://www.sigma-aldrich.com/saws.nsf/Pages/Custom+Bulk?EditDocument). This is a searchable database that allows searches by product name, full text, molecular formula, CAS registry number, etc. The search results include the product name, registry number, molecular formula, molecular weight, storage temperature, purity, and safety data. 5 Thermal chemical property estimation (http://pirika.com/chem/TCPEE/TCPE.htm) Prediction of the thermal chemical properties of organic compounds is carried out based on their structural characteristics; data such as boiling point, vapor pressure, critical properties, density, liquid-phase density, solubility parameters, and viscosity can be predicted. 6 Chemical Synonym Database (http://129.79.137.107/cfdocs/libchem/searchu.html) – Used to search for the full names of compounds using their chemical abbreviations; the abbreviated terms searched are automatically truncated at both the beginning and end. If PVC is searched, the system retrieves CPVC (critical pigment volume concentration, Chlorinated Polyvinyl Chloride), PVC (pigment volume concentration, polyvinyl chloride), and UPVC (unplasticized poly(vinyl chloride)). 7 Canadian Environmental Technology Centre Network (http://www.etcentre.org/cgi-win/oil-prop-cgi.exe?Path=\\Website\\river\\) This is a search-based database that contains information on the properties of 412 different crude oils and petroleum products, including their source, water content, specific gravity, Reid vapor pressure, and non-metallic content. 8 http://www.omnis.demon.co.uk/conversn/constant.htm This site contains basic physical constants, such as Avogadro’s number and the speed of light. 9 http://www.uc.edu/www/geology/org%2Dcont/refer/propert.html (browser-based) The properties of some organic compounds include data such as molecular weight, vapor pressure, Henry’s constant, melting point, and boiling point. 10 http://mc2.cchem.berkeley.edu/Smells/index.html (browser-based) Odor database. It includes data such as the chemical names, common names, molecular formulas, odor categories, properties, melting points, boiling points, vapor pressures, colors, and states of dozens of compounds. 11 http://toxnet.nlm.nig.gov/servlets/simple-search?1.5.0 11.1 National Library of Medicine’s Toxic Chemical Substances Data (HSD). Searches can be performed using the chemical substance’s name/aliases, CAS registry number, or part of its name; the search results include information such as the chemical substance’s name, registry number, synonyms, molecular formula, RTECS number, methods of transportation, and impurities present. 11.2 CCRIS (Chemical Carcinogenesis Research Information Systems) Searches can be performed using the chemical substance’s name/alias, CAS registry number, or partial name of the substance; the search results include the substance’s name, registry number, synonyms, molecular formula, and carcinogenicity data for various animals. 11.3 GENE-TOX (Genetic Toxicology (Mutagenicity) Data) It can be searched using the chemical substance’s name, synonyms, CAS registry number, or partial name; the search results include data such as synonyms, registry numbers, and genetic information. 11.4 IRIS (Integrated Risk Information System) Searches can be performed using the chemical substance’s name/alias, CAS registry number, or partial name; the search results include data such as synonyms, registry numbers, IRIS numbers, and effects on human organs. 12 http://www.atsdr.cdc.gov/hazdat.html HazDat. This database can be searched using the compound’s molecular formula or structure; it provides access to 3D images of the substance, relevant material safety data, as well as Chemfinder resources, along with information on exposure in the environment, potential health hazards, and carcinogenicity. 13 http://www.matweb.com/ MatWeb is a free database of material information resources. This database contains data on 18,548 materials such as metals, plastics, ceramics, and composites, including physical properties (water absorption, hygroscopicity, specific gravity), mechanical properties (tensile strength, elastic modulus, etc.), thermodynamic properties (such as melting point), and electrical properties (dielectric strength, dipole moment, etc.). 14 http://siri.uvm.edu/msds/ (Material Safety Data Sheet) A search engine for material safety data; it allows users to enter the name of a substance, its CAS registry number, or RTECS number to retrieve relevant safety data, and it also provides links to other chemical and toxicology databases. 15 http://www.ultrasonic.com/tables/index.htm (browser-based) Acoustic properties of various materials such as solids, epoxy resins, plastics, rubbers, liquids, and gases. 16 http://wulfenite.fandm.edu/Data/Data.html (browser-based) Data tables for general chemistry, organic chemistry, and physical chemistry, including the physical properties of solvents, the condensation and boiling point constants of metals, electronegativity, formation enthalpies, dissociation energies, electron affinity, bond energies, bond lengths, atomic and ionic radii, solubility, dissociation constants, vapor pressures, electrode potentials, and other properties. 17 http://www.apo.nmsu.edu/Telescop ... 50926-ConversionFac tors/19950926-MProperties.html (browser-based). It lists the properties of common engineering materials, such as specific gravity, elastic modulus, heat capacity, heat of combustion, heat of vaporization, heat transfer coefficient, thermal conductivity, coefficient of thermal expansion, and so on