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

CDC Centers for Disease Control and Prevention - Your Online Source for Credible Health Information

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

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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Occupational Safety and Health Administration - Home

The University of Miami is a private research university with more than 15,000 students from around the world located in Coral Gables, Florida. Established in 1925, the university is a vibrant and diverse academic community focused on teaching and l...

World of Molecules Home Page

Definition of word from the Merriam-Webster Online Dictionary with audio pronunciations, thesaurus, Word of the Day, and word games.

YourDictionary is a free online dictionary that offers definition search from Webster's dictionary for word meanings and thesaurus. Use this dictionary search as a crossword or scrabble dictionary. Also find legal dictionary, technical words, glossar...

ExxonMobil Chemical proudly offers a broad portfolio of petrochemical and polymer products.

Praxair, Inc. a worldwide provider of industrial gases, including atmospheric, process and specialty gases. Praxair helps virtually every industry improve product quality, boost performance and benefit the environment through the application of atmos...