50 million chemicals

By Barbara Ortner on September 17, 2009 1:29 PM

The 50 millionth chemical has been registered on the database of the American Chemical Society. It is "a novel arylmethylidene heterocycle with analgesic properties." Discoveries are speeding up. It took 33 years for the CAS website to register the 10 millionth compound in 1990.

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