Lower levels of bromine (less then 5,000 ppm) are found in some toys. HealthyStuff.org testing can not determine the chemical form of the bromine. However, some voluntary Eco-labels (TCO'05 computer standard for example) standards are requiring elimination of all brominated compounds in plastics due to environmental concerns. Bromine at high levels (>1,000 ppm) is likely associated with the use of brominated flame retardants (BFRs). BFRs are added to plastics, fabrics and foams in order to impart fire resistance, but they are released from these materials into the environmental over the life of the vehicle or child car seat. Some BFRs have been associated with thyroid problems, learning and memory impairment, decreased fertility, behavioral changes, and other health problems.