Nutrition and healthy eating – What is BPA, and what are the concerns about BPA?

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BPA stands for bisphenol A, an industrial chemical that has been used to make certain plastics and resins since the 1950s.

BPA is found in polycarbonate plastics and epoxy resins. Polycarbonate plastics are often used in containers that store food and beverages, such as water bottles. They may also be used in other consumer goods.

Epoxy resins are used to coat the inside of metal products, such as food cans, bottle tops, and water supply lines. Some dental sealants and composites also may contain BPA.

Some research has shown that BPA can seep into food or beverages from containers that are made with BPA. Exposure to BPA is a concern because of the possible health effects on the brain and prostate gland of fetuses, infants, and children. It can also affect children’s behavior. Additional research suggests a possible link between BPA and increased blood pressure, type 2 diabetes, and cardiovascular disease.


Bisphenol A


Bisphenol A.png



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Addendum Wikipedia – Bisphenol A

Bisphenol A (BPA) is a chemical compound and one of the simplest and best-known bisphenols. It is produced by the condensation of phenol and acetone, with an estimated 4 million tonnes of produced worldwide in 2015. It is a colorless solid which is soluble in organic solvents, but poorly soluble in water (0.344 wt % at 83 °C).

BPA and its derivatives have many uses, most of which are centered around plastics. Its largest single application is as a co-monomer in the production of polycarbonates and, to a much lesser extent, polysulfones. Its epoxide derivative BADGE (also called DGEBA) is the starting material for most epoxy resins. Low levels of unpolymerised BPA and BADGE are also used in PVC plastisols, as an auxiliary antioxidant and acid scavenger respectively. A common, if minor, use is as a stabilizer in thermal paper. It is not a plasticizer, although it is often wrongly labeled as such.

BPA is a xenoestrogen, exhibiting estrogen-mimicking, hormone-like properties. Although the effect is very weak, the pervasiveness of BPA-containing materials raises concerns. Many of these materials are non-obvious but commonly encountered; such as coatings for the inside of food cans, clothing, shop receipts, and dental fillings. Since 2008, several governments have investigated its safety, which prompted some retailers to withdraw polycarbonate products. Since then, BPA-free plastics have been manufactured using alternative bisphenols such as bisphenol S and bisphenol F, but there is controversy around whether these are actually safer.

Bisphenol A was reported in 1891 by the Russian chemist Aleksandr Dianin.

In 1934 workers at I.G. Farbenindustrie reported the coupling of BPA and epichlorohydrin. Over the following decade, coatings and resins derived from similar materials were described by workers at the companies of DeTrey Freres in Switzerland and DeVoe and Raynolds in the US. This early work underpinned the development of epoxy resins, which in turn motivated production of BPA. The utilization of BPA further expanded with discoveries at Bayer and General Electric on polycarbonate plastics. These plastics first appeared in 1958, being produced by Mobay and General Electric, and Bayer.

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