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Years after new law, US to propose rules over explosive chemical used in fertilizer bombs
WASHINGTON (AP) ' A homeland security official says the government will issue a proposal to regulate the sale and transfer of ammonium nitrate, the deadly chemical used in the 1995 Oklahoma City bombing that killed 168 people.
In late 2007, Congress told the Homeland Security Department to develop a program to regulate the chemical, which is found in most fertilizers used around the world. On Tuesday, a proposal is expected to be published in the Federal Register.
The proposed regulation would require those who purchase, sell or transfer at least 25 pounds of the chemical in the U.S. to register with the government so they may be screened against U.S. terror watch lists, said the homeland security official, speaking anonymously because the proposal had not formally been published.