A scientific panel has formally urged FDA to rethink a recent conclusion that a chemical used in baby bottles and infant formula packing is safe at current levels, reports WebMD.The chemical, called bisphenol A (BPA), is an ingredient in hard plastics. Consumer and environmental groups and several foreign regulatory bodies have called for the chemical to be banned over concerns that it may pose a health risk. FDA concluded in August that the levels humans typically consume are safe. Earlier this week, a scientific subcommittee rejected that view, saying the agency ignored several studies and that it was premature to declare the chemical safe for human consumption. On Friday, a scientific advisory board signed off on that report, in effect urging the agency to reconsider its conclusion. FDA -- although revisiting its assumptions about safe BPA levels -- is still not recommending any change in consumer behavior. The agency is concerned that switching away from formula could pose a nutritional risk to infants that outweighs any benefit of avoiding BPA.