Despite ongoing safety concerns from parents, consumer groups and politicians, a chemical used in baby bottles, canned food and other items is not dangerous, federal regulators in the U.S. said Friday.

Food and Drug Administration scientists said the trace amounts of bisphenol A that leach out of food containers are not a threat to infants or adults. The plastic-hardening chemical is used to seal canned food and make shatterproof bottles. It also used in hundreds of household items, ranging from sunglasses to CDs.

The FDA's draft report was greeted with enthusiasm by the American Chemistry Council, which has defended the chemical's safety.

"FDA is the government agency we rely upon to assess food-contact products. They've assessed this issue in great detail and their conclusion is very reassuring," said Steve Henges, an executive director with the council.

But environmental groups were quick to criticize the agency's conclusions, which they said relied on industry-funded studies.

"It's ironic FDA would choose to ignore dozens of studies funded by (the National Institutes of Health) — this country's best scientists — and instead rely on flawed studies from industry," said Pete Myers, chief scientist for Environmental Health Sciences.

The FDA report is the latest in a growing pile of assessments of bisphenol, which has been used to package food for decades.

The agency previously declared the chemical safe, but agreed to revisit that opinion after a report by the federal National Toxicology Program said there was "some concern" about its risks in infants. Based on a review of animal studies, the government working group said bisphenol can cause changes in behaviour and the brain, and that it may reduce survival and birth weight in fetuses.

About 93 per cent of Americans have traces of bisphenol in their urine, according to the U.S. Centers for Disease Control and Prevention.

But the FDA's report concludes that those levels are thousands of times below what would actually be dangerous to adults or children.

The FDA released its preliminary re-evaluation ahead of a September meeting where outside advisers will debate the chemical's safety.

Many lawmakers at home and abroad aren't waiting for the agency to complete its review.

Canada has announced its intention to ban the use of the chemical in baby bottles. In the spring of 2008, many retailers in Canada said they were ridding their stores of products containing bisphenol A.

U.S. lawmakers have introduced legislation to ban bisphenol in children's products.