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Bisphenol A (BPA) is a chemical compound primarily used in the manufacturing of various plastics. It is a colourless solid which is soluble in most common organic solvents , but has very poor solubility in water.
Exceptions include bisphenol S, P, and M. "Bisphenol" is a common name; the letter following denotes the variant, which depends on the additional substituents. Bisphenol A is the most popular representative of the group, with millions of metric tons produced globally in the past decade, often simply called "bisphenol".
Epoxy resins derived from bisphenol A are used as coatings on the inside of almost all food and beverage cans; [13] however, due to BPA health concerns, in Japan epoxy coating was mostly replaced by PET film. [14] Bisphenol A is a preferred color developer in carbonless copy paper and thermal point of sale receipt paper.
Bisphenol A diphenyl phosphate is a halogen-free flame retardant used plastics. It is used in polymer blends of engineering plastics, such as PPO/HIPS and PC/ABS, [1] which are commonly used to make casing for electrical items like TVs, computers and home appliances. It is formed by the transesterification of bisphenol A with triphenyl phosphate.
Bisphenol A diglycidyl ether slowly hydrolyzes to 2,2-bis[4(2,3-dihydroxypropoxy)phenyl)propane (bis-HPPP). Similarly, DGEBA reacts with acrylic acid to give vinyl ester resins . The reaction results in opening of the epoxide ring, generating unsaturated esters at each terminus of the molecule.
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]
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This article was the subject of a Wiki Education Foundation-supported course assignment, between 23 September 2019 and 13 December 2019. Further details are available on the course page. Student editor(s): Hbhat3, Lexjennifer, Amunoz18, Ebang21, Lucy H Ahn. Peer reviewers: Ghuynh, Chang2021, Jsodhi1.