bisphenol a epoxy resin chemical formula

In 2008 FDA released a document titled Draft Assessment of Bisphenol A for Use in Food Contact Applications. Bisphenol A (BPA) is a known endocrine disrupting chemical (EDC), and commonly used as a raw material for production of epoxy resins and polycarbonate plastics, 27 such as water bottles, tableware and food packing materials. 2011 Nov 15;257(1):122-36. i) Doerge DR, Vanlandingham M, Twaddle NC, Delclos KB. [42] This process converts the individual molecules of BPA into large polymer chains, effectively trapping them. Bisphenol A is the chemical product of combining one acetone unit with two phenol groups. to be exposed to dangerous levels of bisphenol A epoxy diacrylate. Epoxy is the family of basic components or cured end products of epoxy resins.Epoxy resins, also known as polyepoxides, are a class of reactive prepolymers and polymers which contain epoxide groups. Properties of copolymer epoxy resins. 2011 Nov;124(1):149-60. k) He Z, Paule MG, Ferguson SA. (sometimes called a dimer) is called bisphenol F, which is an important monomer in the production of epoxy resins. Per the diagram below, most epoxy resins are made by reacting Bisphenol A (BPA) with an excess of epichlorohydrin so the end groups are glycidyl ethers. NIEHS offers a broad range of job opportunities, career enhancement programs, and research training grants and programs in environmental health sciences and administration. bisphenol a epoxy resin price are designed to form other substances and play a crucial role in numerous important reactions. CAS number(s): 55818-57- . Epoxy resin is based on epichlorhydrin and bisphenol A. As a result, FDA amended its food additive regulations to no longer provide for these uses of BPA. An amendment of the food additive regulations based on abandonment is not based on safety, but is based on the fact that the regulatory authorization is no longer necessary for the specific use of the food additive because that use has been permanently and completely abandoned. tableware. The National Institute of Environmental Health Sciences (NIEHS) is expanding and accelerating its contributions to scientific knowledge of human health and the environment, and to the health and well-being of people everywhere. Bisphenol A diglycidyl ether (DGEBA) is a pale yellow liquid epoxy compound formed by the polycondensation of epichlorohydrin (ECH) and bisphenol A (BPA). The consensus of major government agencies around the world is that BPA is safe as used in food-contact applications. Epoxy resin, on the other hand, has been of substantial significance to engineering for many decades. PA is also used in the production of epoxy resins. [25], In 1934, workers at I.G. Name: Bisphenol A epoxy diacrylate . 2012 May-Jun;34(3):331-7. l) Patterson TA, Twaddle NC, Roegge CS, Callicott RJ, Fisher JW, Doerge DR. Concurrent determination of bisphenol A pharmacokinetics in maternal and fetal rhesus monkeys. #12-03 Keck Seng Tower, Polycarbonate plastic is a lightweight, high-performance plastic that possesses a unique balance of toughness, optical clarity, high heat resistance, and excellent electrical resistance. Products made from BPA meet high-performance demands. Bisphenol A Epoxy Resin (CAS No. [2]FDA Science Board Subcommittee on Bisphenol A. Pharmacokinetics of bisphenol A in serum and adipose tissue following intravenous administration to adult female CD-1 mice. It belongs to the phenol class of aromatic organic compounds. The results of the CLARITY Study, a 5+ year, multipronged U.S. federal government research program and the largest study ever done on BPA, confirm BPAs safety. BPA can be found in a range of products, such as: plastic food storage containers, including: pitchers. BISPHENOL A DIGLYCIDYL ETHER RESIN,25068-38-6 - Buyers Guide for Chemicals is a directory of chemicals, chemical suppliers and producers. Toxicol Appl Pharmacol. 1675-54-3 Chemical Name: BISPHENOL A DIGLYCIDYL ETHER RESIN CBNumber: CB3749115 Molecular Formula: C21H24O4 Molecular Weight: 340.41 MDL Number: MFCD00080480 MOL File: 1675-54-3.mol MSDS File: SDS Modify Date: 2022-12-30 16:20:48 Request For Quotation BISPHENOL A DIGLYCIDYL ETHER RESIN Properties SAFETY Concerns about the health effects of BPA have led some manufacturers replacing it with other bisphenols, such as bisphenol S and bisphenol F. These are produced in a similar manner to BPA, by replacing acetone with other ketones, which undergo analogous condensation reactions. The ACC petition demonstrated, from publicly available information and information collected from industry sources, that the use of polycarbonate resins in baby bottles and sippy cups had been abandoned. Found that primates (including humans) of all ages effectively metabolize and excrete BPA much more rapidly and efficiently than rodents. Government regulators have the responsibility of reviewing all studies and considering issues like study design and quality and whether the result of any particular study was repeated in other studies. It is found in various products including shatterproof windows, eyewear, water bottles, and epoxy resins that coat some metal food cans, bottle tops, and water supply pipes. Its current uses are as a primary monomer in polycarbonate plastic and epoxy resins. Free of claims are used to indicate that a product does not contain a certain material, such as BPA, but they can sometimes be misleading. BPA is a starting material for the synthesis of plastics, primarily certain polycarbonates and epoxy resins, as well as some polysulfones and . But, lets first start by understanding thermosets. Order: 200 kg Qingdao Cemo Technology Develop Co., Ltd. [106][107] BPA appears able to effect development and reproduction in a wide range of wildlife,[107] with certain species being particularly sensitive, such as invertebrates and amphibians.[106]. . This compound is synthesized by the condensation of acetone with phenol. [2] Also in 2008, the National Toxicology Program Center for the Evaluation of Risks to Human Reproduction, part of the National Institutes of Health, released the Monograph on the Potential Human Reproductive and Developmental Effects of Bisphenol A.[3]. Learn how outdoors and chemistry work together. The amorphous structure of CuPPA-DOPO is characterized by X-ray diffraction and Fourier-transform . BPA is regularly used to strengthen products for human health and safety. The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely. Alternatively, and to a much lesser extent, BPA may be ethoxylated and then converted to its diacrylate and dimethacrylate derivatives (bis-EMA, or EBPADMA). This process, also known as a one-step process, is commonly used for the preparation of low and medium molecular weight bisphenol A epoxy resins. 2010 Sep 1;247(2):158-65. d) Doerge DR, Twaddle NC, Vanlandingham M, Brown RP, Fisher JW. The internal rotation function of the ether bond increases the flexibility of the molecule, and the hydroxyl group enhances the chemical reactivity and the bonding ability, the epoxy group cross-links molecules into a three-dimensional network structure by reacting with a curing agent. The 2003-2004 National Health and Nutrition Examination Survey (NHANES III) conducted by the Centers for Disease Control and Prevention (CDC) found detectable levels of BPA in 93% of 2517 urine samples from people six years and older. Toxicity evaluation of bisphenol a administered by gavage to sprague dawley rats from gestation day 6 through postnatal day 90. Visit ChemicalBook To find more Bisphenol A epoxy resin() information like chemical properties,Structure,melting point,boiling point,density,molecular formula,molecular weight, physical properties,toxicity information,customs codes. [12][13][14] BPA is a xenoestrogen, exhibiting hormone-like properties that mimic the effects of estrogen in the body. Bisphenol F (BPF) based epoxy resins are more flexible than that of BPA-based epoxies. Epoxy resins made with BPA are tough and readily adhere to metal surfaces, making them excellent materials for protective coatings. Epoxy resins made with BPA are tough and readily adhere to metal surfaces, making them excellent materials for protective coatings. The FDAs National Center for Toxicological Research is continuing with an additional study: Rodent chronic toxicity study, which is currently underway. The ACC mark, Responsible Care, the hands logo mark, CHEMTREC, TRANSCAER, and americanchemistry.com are registered service marks of the American Chemistry Council, Inc. May also be known as: Polycarbonate, Epoxy Resins. Paper recycling can be a major source of release when this includes thermal paper,[9][97] leaching from PVC items may also be a significant source,[93] as can landfill leachate. Its chemical formula is (CH3)2C (C6H4OH)2. About 2530% of all BPA is used in the manufacture of epoxy resins and vinyl ester resins. [98], In all cases, wastewater treatment can be highly effective at removing BPA, giving reductions of 9198%. Since that time, the FDA has continued to review additional studies as they became available, including those addressing possible low-dose effects. Cured epoxy resins are inert materials used as protective liners in metal cans to maintain the quality of canned foods and beverages, and have achieved wide acceptance for use as protective coatings because of their exceptional combination of toughness, adhesion, formability, and chemical resistance. CHEMICAL PRODUCT AND COMPANY IDENTIFICATION PRODUCT NAME:WEST SYSTEM 105 Epoxy Resin [90] Different expression of ERR- in different parts of the body may account for variations in bisphenolA effects. [23][24], Bisphenol A was first reported in 1891 by the Russian chemist Aleksandr Dianin. When dropping is completed within half an hour, heat it for 12-24 hours under temperature 70-80C Stop the heating after bisphenol A is completely disappeared validated by TLC method. Pathways include photo-oxidation, or reactions with minerals such as goethite which may be present in soils and sediments. [105] As such, the precise effects of BPA on the growth, reproduction, and development of aquatic organism is not fully understood. Bisphenol A was first synthesized by A.P. [95] Many of the largest sources of BPA pollution are water-based, particularly wastewater from industrial facilities using BPA. Among the various polymers available as resins for composites [26][27][28][29][30][31], epoxy resins are chosen because of their excellent adhesion to many substrates and their high thermal and . NIEHS is committed to conducting the most rigorous research in environmental health sciences, and to communicating the results of this research to the public. [8] Schug et al. The health effects of BPA have been the subject of prolonged public and scientific debate. These studies also addressed questions about how long it takes for the body to dispose of BPA. Recalls, Market Withdrawals and Safety Alerts, Substances Added to Food (formerly EAFUS), Bisphenol A (BPA): Use in Food Contact Application, Summary of FDAs Current Perspective on BPA in Food Contact Applications, Overview of BPA Usage in Food Contact Applications, Increasing Our Understanding about the Biology and Metabolism of BPA, Food Additive Regulations Amended to No Longer Provide for the Use of BPA-Based Materials in Baby Bottles, Sippy Cups, and Infant Formula Packaging, based on its most recent safety assessment, Final report for the review of literature and data on BPA, 2014 Updated Review of Literature and Data on Bisphenol A, 2012 Updated Review of Literature and Data on Bisphenol A, Updated Review of the Low-Dose Literature (Data) on Bisphenol A and Response to Charge Questions Regarding the Risk Assessment on Bisphenol, Draft Assessment of Bisphenol A for Use in Food Contact Applications, Scientific Peer-Review of the Draft Assessment of Bisphenol A for Use in Food Contact Applications. [33] An excess of phenol is used to ensure full condensation and to limit the formation of byproducts, such as Dianin's compound. Every day, people are exposed to a variety of activities or products that could, under certain circumstances, cause harm. The chemical formula of Bisphenol A isC15H16O2. .mw-parser-output .ib-chembox{border-collapse:collapse;text-align:left}.mw-parser-output .ib-chembox td,.mw-parser-output .ib-chembox th{border:1px solid #a2a9b1;width:40%}.mw-parser-output .ib-chembox td+td{width:60%}, Bisphenol A (BPA) is a chemical compound primarily used in the manufacturing of various plastics. Bisphenol A-type epoxy resin is bisphenol A and epichlorohydrin under the action of sodium hydroxide condensation derived. FDA will also continue to consult with other expert agencies in the federal government, including the National Institutes of Health (and the National Toxicology Program), the Environmental Protection Agency, the Consumer Product Safety Commission, and the Centers for Disease Control and Prevention. How does BPA get into the body? These meetings are listed in the NIEHS Events Calendar and are open to the general public. Use the browser controls to adjust the font size, or print this page. Update on Bisphenol A (BPA) for Use in Food Contact Applications, January 2010; March 30, 2012; Updated March 2013; July 2014; November 2014. Epoxy vinyl ester resins (VER), Often shortened to vinyl esters, are an important class of high-performance thermoset molding resins. Demonstrated that oral BPA administration results in rapid metabolism of BPA to an inactive form. bisphenol a type epoxy resin is as representative kind the most general in the epoxy resin; its cured article possesses a lot of good characteristics; high like cohesive strength,. Some of this is further reacted with methacrylic acid to form bis-GMA, which is used to make vinyl ester resins. Based on the effects of metabolism, internal exposures to the active form of BPA following oral administration are predicted to be below 1% or less of the total BPA level administered. BISPHENOL A EPOXY: is solid at room temperature, in the form of prills, white - peal, white to yellow and with a slight phenolic odour. Toxicol Sci. BPA is an important industrial chemical, which is mainly used as a raw material of polycarbonate and epoxy resin. This allows exposure to be easily determined by urine testing, facilitating convenient biomonitoring of populations. Toxicol Sci. Some animal studies suggest that infants and children may be the most vulnerable to the effects of BPA. 133 Cecil Street, There is no scientific basis to say that BPA-free products are safer than products with BPA. BPA is an industrial chemical used to make polycarbonate, a hard, clear plastic, which is used in many consumer products. Epoxy resins made with BPA are tough and readily adhere to metal surfaces, making them excellent materials for protective coatings. Bisphenol A is a chemical compound containing two phenol functional groups. You can also browse global suppliers,vendor,prices,Price,manufacturers of Bisphenol A epoxy resin(). [28], The synthesis of BPA still follows Dianin's general method, with the fundamentals changing little in 130 years. Durable and decorative floorings, such as terrazzo flooring, chip flooring and colored aggregate flooring, are made from epoxy resins. Epoxy Resin Raw Material CAS 106-89-8 Epichlorohydrin 99.9%Min Epichlorohydrin Price, Find Details and Price about Bisphenol-a-Co-Epichlorohydrin 106-89-8 from Epoxy Resin Raw Material CAS 106-89-8 Epichlorohydrin 99.9%Min Epichlorohydrin Price - Shanghai Guanru Chemical Co., Ltd. [92][101][102] Its half life in water has been estimated at between 4.5 and 15 days, degradation in the air is faster than this, while soil samples degrade more slowly. With more than half of the global demand, the Asian market will . Scientific Peer-Review of the Draft Assessment of Bisphenol A for Use in Food Contact Applications, 31 October 2008. 2011 Dec 15;207(3):298-305. f) Doerge DR, Twaddle NC, Vanlandingham M, Fisher JW. Bisphenol A (BPA) is a diphenylmethane derivative, commonly used in the production of polycarbonate plastics, epoxy resins, and various other plastic-based consumer products. Chemical name Common names and synonyms CAS number EC number Concentration; 4,4'-Isopropylidenediphenol, oligomeric reaction products with 1-chloro-2,3-epoxypropane: Recently, FDA granted two petitions requesting that FDA amend its food additive regulations to no longer provide for the use of certain BPA-based materials in baby bottles, sippy cups, and infant formula packaging because these uses have been abandoned. (2013) A new approach to synergize academic and guideline-compliant research: the CLARITY-BPA research program. Excessive amounts of bisphenol A generate linear high molecular compounds with hydroxyl-, etherand epoxy-terminated groups. High-performance epoxy resins are used to make aircraft, cars, bicycles, boats, golf clubs, skis and snowboards durable, flexible and strong. Some are conducted according to internationally recognized standards that ensure methodological and statistical reliability, and others are not. BPA can also be found in breast milk. BPA is also found in epoxy resins, which act as a protective lining on the inside of some metal-based food and beverage cans. It can also be used in the formation of solid polymeric electrolyte for potential application in electrochemical devices. Table 1, Table 2 present the . As can be seen from above, the product is bisphenol A diglycidyl ether when there is sufficient epichlorohydrin and enough sodium hydroxide as the catalyst. MAIN APPLICATIONS Bisphenol A Epoxy is widely used in the manufacture of: Epoxy resins; Phenolic resins . Toxicol Appl Pharmacol. BPA is a structural component in polycarbonate beverage bottles. Using the data and design from the rodent subchronic study, the National Toxicology Program/Food and Drug Administration (NTP/FDA) is conducting a long-term toxicity study of BPA in rodents to assess a variety of endpoints, including novel endpoints where questions have been raised. It is also a component in metal can coatings, which protect the food from directly contacting metal surfaces. Studying this sort of longterm, lowdose interaction is difficult, and although there have been numerous studies, there are considerable discrepancies in their conclusions regarding the nature of the effects observed as well as the levels at which they occur. [74] These interactions are all very weak, but exposure to BPA is effectively lifelong, leading to concern over possible cumulative effects. [34] These are not always removed and are known impurities in commercial samples of BPA. When government scientists review studies to make a safety conclusion, they look at the weight of the evidence, meaning the information available from all sources, and how well each study was conducted. Epoxy resins are made by reacting epichlorohydrin (ECH) and bisphenol A to produce a different chemical substance called bisphenol A diglycidyl ether (also known as BADGE or DGEBA). 2010 Dec 15;199(3):372-6. j) Ferguson SA, Law CD Jr, Abshire JS. 12 oz. Distillation and vacuum distillation are used to remove toluene and unreacted epichlorohydrin, respectively. Transfer to a pear-shaped separatory funnel to separate the liquid, continue washing and separating with deionized water until the solution turns to neutral from alkaline. The hydroxy group may be derived from aliphatic diols, polyols (polyether polyols), phenolic compounds or dicarboxylic acids. BPA is also found in epoxy resins, which act as a protective lining on the inside of some metal-based food and beverage cans. Usage/Application: Polycarbonate , Epoxy resin, Thermal paper. 40:35-40. These may be incorporated at low levels in vinyl ester resins to change their physical properties[45] and see common use in dental composites and sealants.[46][47]. PBE can be used as a reinforcing polymer on nanotubes and nanoparticles which can be useful in electronics, optical and aerospace based applications. In particular, infants are considered to be at greater risk,[83] leading to bans on the use of BPA in baby bottles and related products by the US,[84] Canada,[85] and EU[86] amongst others. BPA can both mimic the action of estrogen and antagonise estrogen, indicating that it is a selective estrogen receptor modulator (SERM) or partial agonist of the ER. [98] Despite its short half-life and non-bioaccumulating character, the continuous release of BPA into the environment causes continuous exposure to both plant[104] and animal life. In fact, the Federal Trade Commission has specifically cautioned that free-of claims may deceive consumers by falsely suggesting that the marketer has improved the product by removing the substance.. Bisphenol A (BPA), a colourless crystalline solid belonging to the family of organic compounds; its molecular formula is C 15 H 16 O 2.BPA is best known for its use in the manufacture of polycarbonate plastics and epoxy resins, particularly those found in water bottles, baby bottles, and other beverage and food containers. The lowest molecular weight an epoxy resin of the DGEBA type can have is 340, but if two elements together can form different molecular weights when they react, the epoxy resin will contain a mixture of epoxy molecules of varying lengths. In the United States, FDA is the agency charged with this review for food contact applications. Chemical Formula . Some, but not all, plastics that are marked with recycle codes 3 or 7 may be made with BPA. Sign in to download full-size image Among the non-food sources, exposures routes include through dust,[10] thermal paper,[20] clothing,[19] dental materials,[69] and medical devices. This is further confirmed by CLARITY, as the results clearly show that BPA has very little potential to cause health effects, even when people are exposed to it throughout their lives, said Steven G. Hentges, Ph.D., Polycarbonate/BPA Global Group of the American Chemistry Council (ACC). In addition to receptor binding, the compound has been found to affect Leydig cell steroidogenesis, including affecting 17-hydroxylase/17,20 lyase and aromatase expression and interfering with LH receptor-ligand binding. 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