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. Although in the latter part of the 20th century BPA found its widest use in plastics, in the 1930s scientists had developed it as a synthetic estrogen and noted the possibility of carcinogenic (cancer-causing) properties. The diagrammatic representation of the bisphenol A structure is given below. please go to the Copyright Clearance Center request page. People are generally exposed to minute levels of BPA, mostly from the ingestion of food or beverages that have been in contact with materials manufactured with BPA. WebAdvantage Description. With Shanghai close to the east, Jiaxing and Hangzhou to the south, Tai Lake to the west and Suzhou to the north, Wujiang City enjoys a superior location and convenient transportation. 529 0 obj <>stream Bisphenol A is an organic compound that is processed synthetically and belongs to the diphenylmethane and bisphenol with two hydroxyphenyl groups attached to the carbon atom of the main chain. The significance of its estrogenic behaviour resurfaced in the early 1990s when a team led by American endocrinologist David Feldman unexpectedly discovered BPA in growth medium in polycarbonate flasks used to culture yeast cells. 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. BPA polycarbonate plastics are very sturdy in nature. WebBisphenol A-(epichlorhydrin)epoxy resin, polymer with polyethylene glycol, castor oil and triethylenetetramine. WebBisphenol A ( BPA) is a chemical compound primarily used in the manufacturing of various plastics. BPA as well as bisphenol S and bisphenol F, which are used as alternatives to BPA, are associated with obesity, particularly in children. 0 WebEpoxy resin | C21H25ClO5 | CID 169944 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety/hazards/toxicity information, supplier lists, and more. Plastic containers have recycle codes on the bottom. EPON (R) RESIN 828 - Nature. Bisphenol A (BPA) is a chemical produced in large quantities for use primarily in the production of polycarbonate plastics. Some of the Important Physicochemical Properties of Bisphenol A are Listed Below: 158 to 1590C or 316 to 3180F or 431 to 432 K. The Chemical Properties of BPA are Listed below. That has been due largely to conflicting scientific evidence for a direct association between low-level exposure and adverse health effects in humans. Polycarbonate is strong and durable, but over time it may break down from over use at high temperatures. It is a colourless solid which is soluble in most common organic solvents, but has very poor solubility in water. If you are giving a presentation about an environmental health topic or The performance of D.E.R. Another reason for concern, especially for parents, may be because some animal studies report effects in fetuses and newborns exposed to BPA. 324 liquid epoxy resin. Its chemical formula is (CH, .
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. It is a colourless solid which is soluble in most common organic solvents, but has very poor solubility in water. Starting from protocatechuic acid, a series of high-performance epoxy vitrimers with different catalyst loadings and ratios of epoxy/anhydride were prepared. Though it is 1000 - 2000 times less fold potent than estradiol, it has the ability to mimic estrogen indicating that it is a selective estrogen receptor modulator t (SERM) and also antagonises estrogen. Thus, overexposure to it is harmful during pregnancy and the development of infants. a We provide you year-long structured coaching classes for CBSE and ICSE Board & JEE and NEET entrance exam preparation at affordable tuition fees, with an exclusive session for clearing doubts, ensuring that neither you nor the topics remain unattended. You do not have JavaScript enabled. Bisphenol A-type epoxy resin is bisphenol A and epichlorohydrin under the action of sodium hydroxide condensation derived. WebQuickly confirm chemical names, CAS Registry Numbers, CAS Registry Number 25068-38-6 . The scientists proceeded to isolate BPA from samples of water that had been autoclaved (sterilized at very high temperature and pressure) in the flasks, confirming that the chemical they had detected earlier in the yeast cultures had in fact come from the plastic used to make the flasks. Our editors will review what youve submitted and determine whether to revise the article. Bisphenol F Epoxy Resins All Rights Reserved. BISPHENOL A Label abbreviations descriptions BISPHENOL A * All sampling instructions above are recommended guidelines for OSHA Compliance Safety and Health Officers (CSHOs), please see the corresponding OSHA method reference for complete details. WebModified Bisphenol A/F Epoxy Resins D.E.R. 353 190 200 800 1000 D.E.R. provided correct acknowledgement is given. okchemvip.com, or notifications@edm-okchem.com. WebBisphenol A (BPA, 80-05-7) is an organic compound used predominantly in the production of products made of polycarbonate plastic and epoxy resins that line food and beverage cans. WebBisphenol A (BPA, 80-05-7) is an organic compound used predominantly in the production of products made of polycarbonate plastic and epoxy resins that line food and beverage cans.

BPA has also been discovered to exert very subtle effects on sexual behaviour in animals. WebModified Bisphenol A/F Epoxy Resins D.E.R. 353 190 200 800 1000 D.E.R. CAS Common Chemistry. Sun and Q. Fang, Much speculation centres around whether BPA is a true endocrine disruptor chemical (EDC) in humans (broadly defined, an EDC is an exogenous substance, one that comes from outside the body, that interferes with natural hormones in the body). Helin Resin Co., Ltd. is located in Wujiang City , a water-town in the Changjiang River Delta, in the southeast of Jiangsu Province . WebBisphenol A ( BPA) is a chemical compound primarily used in the manufacturing of various plastics. 488 0 obj <> endobj 353 liquid epoxy resin is a low viscosity epoxy resin with a very low crystallization tendency. EC number: 500-130-2 . Its chemical formula is (CH3)2C(C6H4OH)2. Some animal studies suggest that infants and children may be the most vulnerable to the effects of BPA. The synthesis of diglycidyl ether of bisphenol A (DGEBA), the most widely used epoxy resin monomer, is: The primary source of exposure to BPA for most people is through the diet. WebQuickly confirm chemical names, CAS Registry Numbers, CAS Registry Number 25068-38-6 . Structure: Uses and WebIn this work, the new epoxy resins showed much better thermal and mechanical properties (T g = 157 C, tensile strength = 65 MPa) than commercial BPA-based epoxy resins.

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Chemical name (IUPAC): 4,4'-Isopropylidenediphenol, oligomeric reaction products with 1 -chloro-2,3-epoxypropane, esters with acrylic acid . WebBisphenol A-(epichlorhydrin)epoxy resin, polymer with polyethylene glycol, castor oil and triethylenetetramine. and diagrams provided correct acknowledgement is given. Ans. WebBisphenol A (BPA, 80-05-7) is an organic compound used predominantly in the production of products made of polycarbonate plastic and epoxy resins that line food and beverage cans. The chemical is also found in a variety of other products, including compact discs and paper receipts. Epoxy vitrimers are the most promising of all vitrimers because they are easy to prepare and durable for long-term service. Brand Names: Not applicable . Let us know if you have suggestions to improve this article (requires login). ",?H"x@L #F j WebBisphenol A diglycidyl ether slowly hydrolyzes to 2,2-bis [4 (2,3-dihydroxypropoxy)phenyl)propane (bis-HPPP). The performance of D.E.R. In 2010 the U.S. EPA reported that more than 1,000,000 pounds (454,000 kilograms) of BPA were released into environmental reservoirs annually, including soil, rivers, lakes, and oceans.

The molecular formula identifies each type of element by its chemical symbol and identifies the number of atoms of each element found in one discrete molecule of the substance. NIEHS has a goal to ensure job opportunities and career enhancements programs for both our work force and our community. They can endure exposure to high temperatures, enabling them to withstand heating in microwave ovens, and they can sustain high-impact collisions, making them invaluable as components of safety equipment, including safety glasses, face guards, motorcycle helmets, and bullet-resistant windows. The reaction results in opening of the epoxide ring, generating unsaturated esters at each terminus of the molecule. 353 in ambient cure formulations is similar to those obtained when using D.E.R. WebQuickly confirm chemical names, CAS Registry Numbers, CAS Registry Number 25068-38-6 . Bisphenol A-type epoxy resin is bisphenol A and epichlorohydrin under the action of sodium hydroxide condensation derived. WebEpoxy resin | C21H25ClO5 | CID 169944 - structure, chemical names, physical and chemical properties, classification, patents, literature, biological activities, safety/hazards/toxicity information, supplier lists, and more. Key Laboratory of Synthetic and Self-assembly Chemistry for Organic Functional Molecules, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese academy of Sciences, Chinese Academy of Science, 345 Lingling Road, Shanghai, PR China These meetings are listed in the NIEHS Events Calendar and are open to the general public. NIEHS intramural scientists have defined descriptive terms of particular relevance to their own research, and have ranked those terms accordingly. BPA is an industrial chemical used to make polycarbonate, a hard, clear plastic, which is used in many consumer products. WebBisphenol A diglycidyl ether slowly hydrolyzes to 2,2-bis [4 (2,3-dihydroxypropoxy)phenyl)propane (bis-HPPP). Use the browser controls to adjust the font size, or print this page. Molecular formula: C21H25ClO5 . WebEpoxy resins are typically formed by the reaction of compounds containing at least two active hydrogen atoms (polyphenolic compounds, diamines, amino phenols, heterocyclic imides and amides, aliphatic diols, etc.) A little percentage of it enters our body through air, dust and contaminated water. It is a colourless solid which is soluble in most common organic solvents, but has very poor solubility in water. and epichlorohydrin. People are generally exposed to minute levels of BPA, mostly from the ingestion of food or beverages that have been in contact with materials manufactured with BPA. The resiliency of BPA plastics has led to their use in medical devices such as heart-lung machines, incubators, artificial kidneys (hemodialyzers), and dental sealants and fillers, and their light weight and optical clarity has made them especially useful for eyeglasses. The great properties of epoxy vitrimers derived from protocatechuic acid indicate that they can be used as renewable alternatives to BPA epoxy resins. The performance of D.E.R. C). How does BPA get into the body? Despite its presence in human populations and its association with reproductive and developmental toxicity in animals, most countries have not imposed regulations on the manufacture, import, or sale of BPA products. It is also widely known for its tendency to leach from those products, which has made it a subject of public health and environmental concern. Moreover, these bio-based epoxy vitrimers can also be reprocessed with extremely high efficiency and degraded in NaOH solution. Main Product: Silicone resin series; Epoxy resin series; Alkyd resin series; Amino resin series; Acrylic resin series, Bisphenol A type epoxy resin E-51(Jiangsu Wujiang HeLi Resin Co.,Ltd. This helps the food and beverages to last long without any decay. Copyright Clearance Center request page. The reaction results in opening of the epoxide ring, generating unsaturated esters at each terminus of the molecule. They write new content and verify and edit content received from contributors.

Similarly, DGEBA reacts with acrylic acid to give vinyl ester resins. CAS Name Bisphenol A epoxy resin Molecular Formula (C 15 H 16 O 2.C 3 H 5 ClO) x Discover more in SciFinder n. Cite this Page Bisphenol A epoxy resin. WebAccording to the water-borne epoxy resin preparation method, bisphenol-A or bisphenol-F type epoxy resin low in molecular weight is subjected to chain extension, and comb-shaped hydrophilic nonionic chain segments are introduced into the structure of the bisphenol-A or bisphenol-F type epoxy resin through chemical modification to obtain Due to their resiliency, they are used in many medical devices such as heart-lung machines, incubators, artificial kidney, dental fillers and sealants and due to their optical clarity it is also used as eyewear glasses. Name: Bisphenol A epoxy diacrylate . Due to their high melting point, they have the ability to withstand high temperatures even inside microwaves. WebIn this work, the new epoxy resins showed much better thermal and mechanical properties (T g = 157 C, tensile strength = 65 MPa) than commercial BPA-based epoxy resins. BPA Initiatives - The National Institute of Environmental Health Sciences (NIEHS) and National Toxicology Program (NTP) have developed an integrated, multipronged, consortium-based approach to optimize BPA-focused research investments to more effectively address data gaps and inform decision making. 324 liquid epoxy resin. Thus, BPA can find its way into tissues and fluids in the human womb. The reaction results in opening of the epoxide ring, generating unsaturated esters at each terminus of the molecule. NIEHS is committed to conducting the most rigorous research in environmental health sciences, and to communicating the results of this research to the public. Bisphenol A (BPA) is a chemical produced in large quantities for use primarily in the production of polycarbonate plastics. 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. Name: Bisphenol A epoxy diacrylate . Because of its high density, it has the capability to withstand high impact collisions. No image available. 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.