OTTAWA — The Canadian government is said to be ready to declare as toxic a chemical widely used in plastics for baby bottles, beverage and food containers as well as linings in food cans.

A person with knowledge of the government’s chemical review program spoke on the condition he not be named because of a confidentiality agreement. He said the staff work to list the compound, called bisphenol-a, or B.P.A., as a toxic chemical was complete and was recently endorsed by a panel of outside scientists.

A public announcement by Health Canada may come as early as Wednesday but could be delayed until the end of May. Canada would be the first country to make a health finding against B.P.A., which has been shown to disrupt the hormonal systems of animals. The department’s decision was first reported in The Globe and Mail, a Toronto newspaper, on Tuesday.

Also on Tuesday, a draft report from the United States Department of Health and Human Services’ National Toxicology Program endorsed a scientific panel’s finding that there was “some concern” about neural and behavioral changes in humans who consume B.P.A.