25085-99-8) Suppliers Limit companies to: Worldwide USA China India EMAIL INQUIRY to 13 suppliers BOC Sciences | Address: Ramsey Road, Shirley, New York 11967, USA https://www.bocsci.com | Send Inquiry | Phone: +1- (631)-485-4226 BOC Sciences is a brand of BOCSCI Inc. 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. As a result, many exploratory scientific studies have appeared in the public literature. Sign in to download full-size image . The conclusion is not based simply on the number of studies, but more importantly on their quality and scientific value. . Studies are different, and all are not of the same quality. To improve the compatibility between flame retardant and epoxy resin (EP) matrix, amino phenyl copper phosphate-9, 10-dihydro-9-oxygen-10-phospha-phenanthrene-10-oxide (CuPPA-DOPO) is synthesized through surface grafting, which is blended with EP matrix to prepare EP/CuPPA-DOPO composites. [15] Although the effect is very weak,[16] the pervasiveness of BPA-containing materials raises concerns, as exposure is effectively lifelong. It is alcohol, ketone and ether soluble but presents low solubility in water and carbon tetrachloride. 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. resins are bisphenol A diglycidyl ether (DGEBA) and epoxy phenol In recent years, DGEBA has been used for the inner coating of packaging materials such as canned food. [48] BPA is a major component of several high-performance plastics, the production of these is low compared to other plastics but still equals several thousand tons a year. The .gov means its official.Federal government websites often end in .gov or .mil. Epoxy resins made with BPA are tough and readily adhere to metal surfaces, making them excellent materials for protective coatings. [90] Different expression of ERR- in different parts of the body may account for variations in bisphenolA effects. [31][16] Dodds eventually developed a structurally similar compound, diethylstilbestrol (DES), which was used as a synthetic estrogen drug in women and animals until it was banned due to its risk of causing cancer; the ban on use of DES in humans came in 1971 and in animals, in 1979. Food cans and other metal containers may be coated with epoxy resin linings made with BPA to help prevent direct food contact with metal, which helps protect food from contamination and spoilage. BPA is one of the most thoroughly tested chemicals in use today and has a safety track record of more than 50 years. NIEHS research uses state-of-the-art science and technology to investigate the interplay between environmental exposures, human biology, genetics, and common diseases to help prevent disease and improve human health. The review was documented in four memoranda and their attachments: Strong consumer and scientific interest in the safety of BPA has prompted FDA to support additional studies to provide further information and address apparent inconsistencies in the scientific literature about BPA. 2010 Dec 15;199(3):372-6. j) Ferguson SA, Law CD Jr, Abshire JS. It is commonly used in curing fast-drying epoxy resin adhesives. 2011 Nov;124(1):149-60. k) He Z, Paule MG, Ferguson SA. .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 Resin. Toxicol Sci. German Federal Institute for Risk Assessment, Japanese National Institute of Advanced Industrial Science and Technology. At 830C). At high concentrations, BPA also binds to and acts as an antagonist of the androgen receptor (AR). In the fall of 2014, FDA experts from across the agency, specializing in toxicology, analytical chemistry, endocrinology, epidemiology, and other fields, completed a four-year review of more than 300 scientific studies. Specialty Chemicals And Polymers. Reports indicate that it is a minor skin irritant as well, although less so than phenol. Toxicol Appl Pharmacol. An official website of the United States government. Add bisphenol A and epichlorohydrin in the amount of 1:4 into a three-necked flask equipped with a reflux device, place it in a constant-temperature oil bath, melt it with 70 C of heat, and dropwise 28.57% aqueous sodium hydroxide solution with a dropping funnel, in which the ratio of the amount of sodium hydroxide and bisphenol A is 4:1. J Appl Polym Sci . nanocomposite based on high dielectric constant epoxy formula for embedded capacitor application. [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. After their first commercial production in the late 1940s, epoxy resins comprise a wide family of materials today. 2010 Sep 1;247(2):158-65. d) Doerge DR, Twaddle NC, Vanlandingham M, Brown RP, Fisher JW. The subchronic study was designed to characterize potential effects of BPA in a wide range of endpoints, including prostate and mammary glands, metabolic changes, and cardiovascular endpoints. Cool the mixture to room temperature; add extractant toluene/water (volume ratio 2:1) and stir it at room temperature for half an hour. 250/ Ton Get Latest Price. Use a solvent mixture of petroleum ether and ethyl acetate (volume ratio 3:1) a developing solvent to purify it by column chromatography according to the above procedure to obtain DGEBA. In order to formulate an epoxy adhesive, one must have either bisphenol A or bisphenol F. Bisphenol A (BPA) is generally preferred for its curing properties. A large number of ketones undergo analogous condensation reactions. Bisphenol-A, commonly abbreviated as BPA, is an organic compound with the chemical formula (CH 3) 2 C (C 6 H 4 OH) 2 belonging to the group of diphenylmethane derivatives and bisphenols, with two hydroxyphenyl groups. [28], The synthesis of BPA still follows Dianin's general method, with the fundamentals changing little in 130 years. a) Churchwell MI, Camacho L, Vanlandingham MM, Twaddle NC, Sepehr E, Delclos KB, Fisher JW, Doerge DR. Order: 18 Tons Shandong Near Chemical Co., Ltd. View larger video & image Contact Now Hot Sale Bisphenol a CAS No. CHEMICAL PRODUCT AND COMPANY IDENTIFICATION PRODUCT NAME:WEST SYSTEM 105 Epoxy Resin NIEHS has a goal to ensure job opportunities and career enhancements programs for both our work force and our community. If youve ever read a news article or blog post about chemicals, you may have heard the oft-cited claim that there are 84,000 chemicals in commerce but only 200 of these have been tested for safety. Comparison of life-stage-dependent internal dosimetry for bisphenol a, ethinyl estradiol, a reference estrogen, and endogenous estradiol to test an estrogenic mode of action in Sprague Dawley rats. (2013) A new approach to synergize academic and guideline-compliant research: the CLARITY-BPA research program. To address these questions the National Toxicology Program, partnering with FDAs National Center for Toxicological Research is carrying out in-depth studies to answer key questions and clarify uncertainties about BPA. [22] BPA-free plastics have also been introduced, which are manufactured using alternative bisphenols such as bisphenol S and bisphenol F, but there is also controversy around whether these are actually safer. Product. It can also be used in the formation of solid polymeric electrolyte for potential application in electrochemical devices. The study orally dosed pregnant rodents with 100-1000 times more BPA than people are exposed to through food, and could not detect the active form of BPA in the fetus 8 hours after the mother's exposure. 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. Because of the way BPA is processed in the body, it is very unlikely that exposure to BPA at typical levels could cause health effects. 1). Camacho L, Vanlandingham MM, Twaddle NC, Sepehr E, Delclos KB, Fisher JW, Doerge DR. Camacho L, Lewis SM, Vanlandingham MM, Latendresse JR, Olson GR, Davis KJ, Patton RE, Gamboa da Costa G, Woodling KA, Bryant MS, Chidambaram M, Trbojevich R, Juliar BE, Felton RP, Thorn BT. Watch Tutorial: How to Select the Best Curing Agent for Epoxy Systems. 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,. The chemical formula is (CH 3 ) 2 C(C 6 H 4 OH) 2. It belongs to the phenol class of aromatic organic compounds. Excessive amounts of bisphenol A generate linear high molecular compounds with hydroxyl-, etherand epoxy-terminated groups. Theres a potential for harm or injury in nearly every activity we engage in whether its when we cross a street, ride in an automobile, or play in a baseball game. While air, dust, and water are other possible sources of exposure, BPA in food and beverages accounts for the majority of daily human exposure. [2][7] BPA is produced on an industrial scale by the condensation of phenol and acetone, and has a global production scale which is expected to reach 10 million tonnes in 2022.[8]. Toxicol Appl Pharmacol. This orphan receptor (endogenous ligand unknown) behaves as a constitutive activator of transcription. Bisphenol S (BPS) is an organic compound with the formula (HOC 6 H 4) 2 SO 2.It has two phenol functional groups on either side of a sulfonyl group. Our line of powerful Liquid Epoxy Resins -including Bisphenol A, Modified Bisphenol A, Bisphenol A/F, Modified Bisphenol A/F, Bisphenol F offers the reliability, protection and performance you need, backed by the local customer support Only Olin can provide, virtually anywhere in the world. (the chemical formula is shown in Fig. [95] BPA in sediment degrades most slowly of all, particularly where this is anaerobic. The condensation of acetone (hence the suffix 'A' in the name)[32] with two equivalents of phenol is catalyzed by a strong acid, such as concentrated hydrochloric acid, sulfuric acid, or a solid acid resin such as the sulfonic acid form of polystyrene sulfonate. This petition demonstrated, from publicly available information and information collected from industry sources, that the use of BPA-based epoxy resins as coatings in packaging for infant formula had been abandoned. [74] These interactions are all very weak, but exposure to BPA is effectively lifelong, leading to concern over possible cumulative effects. NIEHS offers a broad range of job opportunities, career enhancement programs, and research training grants and programs in environmental health sciences and administration. While they have high mechanical strength values similar to epoxy resins, they are easy to apply similar to unsaturated polyester resins. Polycarbonate plastic is used to make critical components of many medical devices and their housings. Federal government websites often end in .gov or .mil. This is called a two-step method. 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 Appl Pharmacol. The degree to which BPA leaches from polycarbonate bottles into liquid may depend more on the temperature of the liquid or bottle, than the age of the container. Bisphenol A epoxy resin is the most common type for concrete coatings because of its excellent adhesion, toughness, abrasion resistance, and chemical resistance. The original approvals for BPA were issued under FDAs food additive regulations and date from the 1960s. Due to interest in the exposure to bisphenol A in the community1 and the workplace, OSHA developed a validated method to collect and analyze bisphenol A and diglycidyl ether of bisphenol A. A resource for kids, parents, and teachers to find fun and educational materials related to health, science, and the environment Usage/Application: Polycarbonate , Epoxy resin, Thermal paper. The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely. MATERIAL SAFETY DATA SHEET West System Inc. MSDS #105-13a Last Revised: 26APR13 1. Epoxy vinyl ester resins (VER), Often shortened to vinyl esters, are an important class of high-performance thermoset molding resins. Toxicol Lett. Pharmacokinetics of bisphenol A in neonatal and adult Sprague-Dawley rats. Hot Sale CAS No 80-05-7 BPA Solid Bisphenol a for Epoxy Resin Price in Stock FOB Price: US$ 1900-2200 / Ton Min. Use the browser controls to adjust the font size, or print this page. Polycarbonate plastic also is used to make housings for electronic products such as cell phones and laptops, as well as optical discs such as CDs and DVDs. [11] www.who.int/foodsafety/areas_work/chemical-risks/bisphenol/en/, An official website of the United States government, : The CDC NHANES data are considered representative of exposures in the United States. Before sharing sensitive information, make sure you're on a federal government site. Polycarbonate plastic is a lightweight, high-performance plastic that possesses a unique balance of toughness, optical clarity, high heat resistance, and excellent electrical resistance. Search for free and find new suppliers for chemical products, pharmaceuticals and APIs. 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. Download or play NIEHS Health Chat's with a wide range of experts and topics. Update on Bisphenol A (BPA) for Use in Food Contact Applications, January 2010; March 30, 2012; Updated March 2013; July 2014; November 2014. Bisphenol A (BPA) is a chemical produced in large quantities for use primarily in the production of polycarbonate plastics. [90] BPA binding to ERR- preserves its basal constitutive activity. 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. Uses of all substances that migrate from packaging into food,. Based on FDAs ongoing safety review of scientific evidence, the available information continues to support the safety of BPA for the currently approved uses in food containers and packaging. The manufacturing of epoxy resins and vinyl ester resins account for 25-30% of BPA use. Bottle producers have largely switched from polycarbonate to polypropylene and there is some evidence that BPA exposure in infants has decreased as a result of this. [103], BPA is an environmental contaminant of emerging concern. NIEHS provides many opportunities for funding to individual researchers, organizations, and businesses. [89], BisphenolA's interacts with the estrogen-related receptor (ERR-). [65][24], As a result of the presence of BPA in plastics and other commonplace materials, most people are frequently exposed to trace levels of BPA. Background. Copyright 2022 ChemicalBook. At that time, another synthetic compound, diethylstilbestrol, was determined to be more powerful than estrogen itself, so bisphenol A was not used as a synthetic estrogen. [2]FDA Science Board Subcommittee on Bisphenol A. Bisphenol F (BPF) based epoxy resins are more flexible than that of BPA-based epoxies. 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). Commercial production of BPA requires distillation either extraction of BPA from many resinous byproducts under high vacuum or solvent-based extraction using additional phenol followed by distillation. It belongs to the phenol class of aromatic organic compounds. from modified natural oils and Bisphenol A or Bisphenol A-based epoxy resins. The studies reviewed were published or available from November 1, 2009 to July 23, 2013. Bisphenol A (BPA) is a chemical used to make polycarbonate plastic. It is not a plasticizer,[11] although it is often wrongly labelled as such. MAIN APPLICATIONS Bisphenol A Epoxy is widely used in the manufacture of: Epoxy resins; Phenolic resins . Low oral doses of bisphenol A increase volume of the sexually dimorphic nucleus of the preoptic area in male, but not female, rats at postnatal day 21. Every day, people are exposed to a variety of activities or products that could, under certain circumstances, cause harm. [5] Although the reassessments indicated a need to further evaluate a number of endpoints or biological outcomes, the analyses did not recommend any adjustments to BPA levels reported in food at that time. Dont microwave polycarbonate plastic food containers. [37] Crystals form in the monoclinic space group P 21/n (where n indicates the glide plane); within this individual molecules of BPA are arraigned with a 91.5 torsion angle between the phenol rings. For more chemical safety facts, follow us on social media. The chemical formula of Bisphenol A is C15H16O2. Polym Adv Technol 2009; 20: 194-208. . Recently completed a rodent subchronic study [7] intended to provide information that would help in designing a long-term study that is now underway (see below). 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. Phenol-formaldehyde resin . NIEHS is committed to conducting the most rigorous research in environmental health sciences, and to communicating the results of this research to the public. Copolymer epoxy resins were prepared using a two-step process in which 10, 30 and 50% of bisphenol-A was replaced with liquefied bamboo. Neurotoxicol Teratol. The FDA review has not found any information in the evaluated studies to prompt a revision of FDAs safety assessment of BPA in food packaging at this time. FDA continues to review the available information and studies on BPA. Brand Names: Not applicable . Released in 2018 by the U.S. National Toxicology Program, the data supports FDAs one word answer to the question Is BPA safe?: Yes. It is important to note that scientific experts at FDA, and other regulatory bodies, review the full weight of the scientific evidence when making decisions about safety. Polycarbonate plastic made with BPA is shatter-resistant, lightweight, and has high optical clarity, similar to glass. 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 .gov means its official. The reaction is catalyzed by a strong acid, such as hydrochloric acid (HCl) or a sulfonated polystyrene resin. [38][39][40] Spectroscopic data is available from AIST.[41]. [7], BPA has been found to interact with a diverse range of hormone receptors, in both humans and animals. FDA can make regulatory changes based on new safety or usage information. Chemical Formula . [90] This may be the mechanism by which BPA acts as a xenoestrogen. , often shortened to vinyl esters, are an important class of high-performance thermoset molding resins resins comprise a family... System Inc. MSDS # 105-13a Last Revised: 26APR13 1 National Toxicology program, synthesis. 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bisphenol a epoxy resin chemical formula