Judge tosses spill claims against dispersant maker

A federal judge presiding over litigation from the massive Gulf oil spill has dismissed all claims against the manufacturer of a chemical dispersant that was used to break up crude that gushed from BP's blown-out well. U.S. District Judge Carl Barbier ruled last week that federal laws shield Illinois-based Nalco Co. from liability over the government's use of Corexit after the 2010 spill.

Lawyers for cleanup workers and coastal residents exposed to the dispersant had argued Nalco isn't immune from claims it supplied a defective product that wasn't safe to use in the Gulf. But the judge said the claims would create an "obstacle to federal law."

More than 1.8 million gallons of the dispersant were used in the spill.

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