Chemical & Physical Properties: Home

Chemical Databases

ChemSpider  [Links together compound information across the web, providing free text and structure search access of millions of chemical structures.]

PubChem  [Free database of chemical structures of small organic molecules and information on their biological activities.]

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Indexes to Property Data

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Wolfram Alpha

Answer questions; do math; instantly get facts, calculators, unit conversions, and real-time quantitative data and statistics; create plots and visualizations; and access vast scientific, technical, chemical, medical, health, business, financial, weather, geographic, dictionary, calendar, reference, and general knowledge—and much more.