Chinese officials reportedly have refused to identify the manufacturer of an antifreeze ingredient that tainted Haitian anti-fever medicine last year, killing at least 80 children.
The U.S. Centers for Disease Control and Prevention said imported glycerin used to make Haitian brands of the syrup had been tainted with diethylene glycol, a toxic substance used in industrial solvents and antifreeze.
At the time, CDC officials said they did not know where the tainted glycerin came from. But "60 Minutes" reported Sunday that it was traced through European companies to a state-owned company in China, SinoChem International Chemicals Co.
The CBS program said SinoChem got the glycerin from another Chinese manufacturer, then sold it abroad, certifying it as 98 percent pure.