WAYNE, N.J. (AP) -- Toys "R" Us says it plans to phase out all plastic baby bottles containing a chemical that's facing safety questions.

The toy and baby products retailer said Monday that it hopes to have all baby feeding products containing bisphenol A (BIS'-fuh-nawl ay), or BPA, off the shelves by the end of the year.

The U.S. government's National Toxicology Program says there is "some concern" about BPA. Experiments on rats linked the chemical to changes in behavior and the brain, early puberty and possibly precancerous changes in the prostate and breast.

Canada has said it may ban use of BPA in baby bottles.

Wal-Mart Stores Inc. said last week that it expects its entire assortment of baby bottles to be BPA-free early next year.