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This compilation of kinetic and photochemical data is prepared by the NASA Panel for Data Evaluation. The Panel was established in 1977 by the NASA Upper Atmosphere Research Program Office for the purpose of providing a critical tabulation of the latest kinetic and photochemical data for use by modelers in computer simulations of atmospheric chemistry. Updates to this evaluation are released every two to three years in electronic form as JPL Publications.
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ChemIDplus content is being migrated to PubChem. before: ChemIDplus is a free, web-based search system that provides access to structure and nomenclature authority files used for the identification of chemical substances cited in National Library of Medicine (NLM) databases. ChemIDplus also provides structure searching and direct links to many biomedical resources at NLM and on the Internet for chemicals of interest. The database is searchable by Name, Synonym, CAS Registry Number, Molecular Formula, Classification Code, Locator Code, Structure, Toxicity, and/or Physical properties.
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ChemSpider is a free chemical structure database providing access to over 25 million structures, properties and associated information. By integrating and linking compounds from more than 400 data sources, ChemSpider enables researchers to discover the most comprehensive view of freely available chemical data from a single online search. ChemSpider builds on the collected sources by adding additional properties, related information and links back to original data sources. ChemSpider offers text and structure searching to find compounds of interest.
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ChemSynthesis is a freely accessible database of chemicals. This website contains substances with their synthesis references and physical properties such as melting point, boiling point and density. There are currently more than 40,000 compounds and more than 45,000 synthesis references in the database.
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COMAR helps you find a suitable certified reference material (CRM) for your laboratory. For a large number of materials offered worldwide we have produced data sheets and collected them in the COMAR database. You can browse and search the database at no cost. What is not included in the database are reference materials that come without a certificate.
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Die DECHEMA-Werkstoff-Tabelle ist ein Online-Nachschlagewerk mit mehr als 120.000 Werkstoff-Medium-Kombinationen. Sie enthält Aussagen zur Korrosions- und chemischen Beständigkeit von Werkstoffen aller Art (metallische Werkstoffe, Kunststoffe und nichtmetallische anorganische Werkstoffe) und Werkstoffempfehlungen von industriellen Werkstoffen in über 1.000 korrosiven Medien.
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This website provides kinetic and photochemical data evaluated by the IUPAC Subcommittee for Gas Kinetic Data Evaluation.
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ICDS is a comprehensive database on the complete structural information for inorganic compounds. It contains bibliographic information, compound name, molecular formular, as well as crystal symmetry group, unit cell parameters, atomic coordinates and temperature factors.
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A database containing solubilities originally published in the IUPAC (International Union for Pure and Applied Chemistry). Mutual solubilities and liquid-liquid equilibria of binary, ternary and quaternary systems are presented. Typical solvents and solutes include water, sea water, heavy water, inorganic compounds, and a variety of organic compounds such as hydrocarbons, halogenated hydrocarbons, alcohols, acids, esters and nitrogen compounds. Scope: There are over 67,500 solubility measurements, compiled from 18 volumes of the IUPAC Solubility Data Series. There are about 1800 chemical substances in the database and 5200 systems, of which 473 have been critically evaluated.
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MatWeb's searchable database of material properties includes data sheets of thermoplastic and thermoset polymers such as ABS, nylon, polycarbonate, polyester, polyethylene and polypropylene; metals such as aluminum, cobalt, copper, lead, magnesium, nickel, steel, superalloys, titanium and zinc alloys; ceramics; plus semiconductors, fibers, and other engineering materials.
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The MPI-Mainz UV/VIS Spectral Atlas is a comprehensive collection of cross sections for gaseous molecules and radicals, primarily relevant to atmospheric research. The individual data sets were collected from the original publications, either copied from tabulations, or read from figures in those cases where numerical data could no longer be obtained. In addition, several spectra were obtained from databases of several research centers and via personal communication.
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MSI Eureka is a research & information platform that compiles and critically evaluates data on materials constitution, phase diagrams, etc. The database covers virtually all inorganic materials systems ever published, dates back to pre-1900 and is continuously updated. The content is being created by MSIT®, Materials Science International Team, in continuous evaluation programs, ongoing since 1984.
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This database provides access and search capability for NIST critically evaluated data on atomic energy levels, wavelengths, and transition probabilities.
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The NIST Chemical Kinetics Database includes essentially all reported kinetics results for thermal gas-phase chemical reactions. The database is designed to be searched for kinetics data based on the specific reactants involved, for reactions resulting in specified products, for all the reactions of a particular species, or for various combinations of these. In addition, the bibliography can be searched by author name or combination of names. The database contains in excess of 38,000 separate reaction records for over 11,700 distinct reactant pairs.
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The NIST Chemistry WebBook provides users with easy access to chemical and physical property data for chemical species through the internet. The data provided in the site are from collections maintained by the NIST Standard Reference Data Program and outside contributors. Data in the WebBook system are organized by chemical species. The WebBook system allows users to search for chemical species by various means. Once the desired species has been identified, the system will display data for the species.
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The NIST-JANAF Thermochemical Tables website is on an online resource that contains the contents of the NIST-JANAF Thermochemical Tables printed volumes. This website is a resource for sharing the data from the work that went into producing the volumes, not as a resource for the most up-to-date thermochemical data available. This is intended as a historic archive for an incredibly valuable resource that continues to have value today.
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Diatomic Spectral Database, Triatomic Spectral Database and Hydrocarbon Spectral Database. Each of the databases covers primarily the microwave region with some data available for the radio frequency region. Rotational spectral lines for 121 diatomic molecules, 55 triatomic molecules, and 91 hydrocarbon molecules have been tabulated. The isotopic molecular species, assigned quantum numbers, observed frequency, estimated measurement uncertainty, and reference are given for each transition reported. The spectral lines for many molecules and normal isotopic species have been refit to produce a comprehensive and consistent analysis of all the data extracted from various literature sources. The derived molecular properties, such as rotational and centrifugal distortion constants, hyperfine structure constants, electric dipole moments, rotational g-factors and internuclear distances (for diatomic molecules) are listed with one standard deviation uncertainties for all species.
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NIST supports accurate and compatible measurements by certifying and providing over 1300 Standard Reference Materials with well-characterized composition or properties, or both. These materials are used to perform instrument calibrations in units as part of overall quality assurance programs, to verify the accuracy of specific measurements and to support the development of new measurement methods.
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Nucleonica is a web portal developed for the worldwide nuclear science community. This resource replaces the traditional paper-based Karlsruhe Nuclide Chart. It offers online interactive nuclide charts, as well as reference data and searchable databases for internationally evaluated nuclear data. Nucleonica includes also application modules (decay, dosimetry and shielding, fission yields, range and stopping power, reactor irradiation, transport and packaging, etc.) with professional quality graphics. In addition, a variety of social networking tools are provided for scientific collaboration. To get access please register with your email address.
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Phase diagrams of ceramic systems. The Phase Equilibria Diagrams Online database includes all ACerS/NIST commentaries and diagrams.
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