In another split, Europe recently required industry to run extensive health and environmental tests on the 30,000 most common chemicals.

The United States has a voluntary program in which companies disclose information on 2,200 of their most common chemicals.

Various studies have found insufficient data are available on the health effects of common chemicals.

This was eventually linked to the drug's interacting with a common chemical known as tyramine found in many types of food.

Urea is such a common chemical that regulating its sales would probably be nearly impossible.

It ranks fourth as the most common chemical in living tissues, behind oxygen, carbon and hydrogen.

Patients with multiple chemical sensitivity claim to be made ill by a variety of common chemicals.

For chemical resistance, I would appreciate some common chemicals that plexiglas can and cannot withstand.

And instructions for making bombs from common chemicals were on their way to Kon-trau'lega, the prison planet in the same system.

As a simple metal salt, it is a common chemical in basic inorganic chemistry experiments.