DuPont

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said it has been served with a grand jury subpoena by a division of the Justice Department asking for information on perfluorooctanoic acid (PFOA) and its salts.

The subpoena, served by the Environmental Crimes Section of the Justice Department's Environment and Natural Resources Division, calls for the production of documents previously provided to the Environmental Protection Agency, along with other information related to the chemicals.

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PFOA is used in manufacturing nonstick Teflon.

"DuPont is committed to operate to the highest standards of ethical behavior and environmental responsibility," the Wilmington, Del., chemicals maker said in a press release. "We will be fully responsive to the DOJ in this matter."

The company said it received the subpoena on Tuesday. Shares of DuPont were down 36 cents to $47.68 on the

New York Stock Exchange

.