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WASHINGTON – The Food and Drug Administration said Tuesday that baby bottles and children’s drinking cups could no longer contain bisphenol A, or BPA, an estrogen-mimicking industrial chemical used in some plastic bottles and food packaging.

Manufacturers have already stopped using the chemical in baby bottles and sippy cups, and the F.D.A. said that its decision was a response to a request by the American Chemistry Council, the chemical industry’s main trade association, that rules allowing BPA in those products be phased out, in part to boost consumer confidence.

But the new prohibition does not apply more broadly to the use of BPA in other containers, said an F.D.A. spokesman, Steven Immergut. He said the decision did not amount to a reversal of the agency’s position on the chemical. The F.D.A. declared BPA safe in 2008, but began expressing concerns about possible health risks in 2010.

Michael Taylor, deputy commissioner for foods at the agency, said the decision simply codified what the industry was already doing based on the preference of consumers and did not reflect concerns about the safety of BPA in baby bottles or toddler’s cups.

The decision “solidifies legally that the use will not happen again in the future” in baby bottles and cups for toddlers, he said. He added that the agency “has been looking hard at BPA for a long time, and based on all the evidence, we continue to support its safe use.”