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ChemSpider is a free chemical structure database providing fast access to over 26 million structures, properties and associated information.

THE CHEMICAL COMPANY provides industrial quantity-chemicals to the paper, food, drug, cosmetic, petroleum and plastic industries.

NIST site provides chemical and physical property data on over 40,000 compounds.

Infoplease.com, a free, authoritative, and respected reference for Internet users, provides a comprehensive encyclopedia, almanac, atlas, dictionary, and thesaurus. Infoplease.com contains facts on all subjects including sports, entertainment, techno...

Make toys at home with common household materials, often in only a few minutes, that demonstrate fascinating scientific principles.

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Online Dictionary - Multiple dictionaries including: English dictionary, medical dictionary, legal dictionary, financial dictionary, computer dictionary, thesaurus, dictionary of acronyms and abbreviations, dictionary of idioms, thesaurus, Columbia e...

Dictionary.com - the largest and most trusted free online dictionary. Instantly look up accurate and extensive definitions and word meanings, and hear audio pronunciations.

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