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Polycarbonate is commonly used in eye protection, as well as in other projectile-resistant viewing and lighting applications that would normally indicate the use of glass, but require much higher impact-resistance. Polycarbonate lenses also protect the eye from UV light.
The health effects of BPA have been the subject of prolonged public and scientific debate. [12] [13] [14] BPA is a xenoestrogen, exhibiting hormone-like properties that mimic the effects of estrogen in the body. [15] Although the effect is very weak, [16] the pervasiveness of BPA-containing materials raises concerns, as exposure is effectively ...
Chemical structure of bisphenol A(BPA). Bisphenol A controversy centers on concerns and debates about the biomedical significance of bisphenol A (BPA), which is a precursor to polymers that are used in some consumer products, including some food containers.
Woodruff, who has studied the effect of some chemicals found in plastics on human health, reproduction, and development for two decades, first started looking into microplastics in 2021.
Between 1936 and 1937, there were several medical cases and papers released on the possible link between PCBs and its detrimental health effects. In 1936, a U.S. Public health Service official described the wife and child of a worker from the Monsanto Industrial Chemical Company who exhibited blackheads and pustules on their skin.
On April 18, 2008, Health Canada announced that bisphenol A is "'toxic' to human health". [11] On the same date, Nalgene announced it would phase out production of its Outdoor line of polycarbonate containers containing BPA. [12] Nalgene subsequently adopted Tritan copolyester, a BPA-free copolyester made by Eastman Chemical, as a substitute. [13]
Tritan, a copolymer offered by the Eastman Chemical Company since 2007, is a transparent plastic intended to replace polycarbonate, because of health concerns about Bisphenol A (BPA). [1] [2] Tritan is a copolymer made from three monomers: dimethyl terephthalate (DMT), cyclohexanedimethanol (CHDM), and 2,2,4,4-Tetramethyl-1,3-cyclobutanediol ...
Bisphenols A (BPA), F (BPF) and S (BPS) have been shown to be endocrine disruptors, potentially relating to adverse health effects. [3] [6] Due to its high production volumes, BPA has been characterised as a "pseudo-persistent" chemical, [7] leading to its spreading and potential accumulation in a variety of environmental matrices, even though it has a fairly short half-life.