Some data may have been extracted from scientific literature using a pipeline that uses large language models (LLMs). Source articles are cited where applicable to help verify the extracted relationships.
Furan belongs to the heteroaromatic compounds, a class of organoheterocyclic compounds within the organic compounds. This exogenous compound has the formula C4H4O and an average molecular weight of 68.07 g/mol. At room temperature, furan is a liquid.
Industrially, furan is used as a solvent (PMC11467972 ) and an intermediate. Chemically, it is a product of the Maillard reaction. Biologically, it acts as a hepatotoxic agent and a carcinogenic agent (PMC11467972 ). It is associated with cancer (PMC11843876 ) and targets the protein Cytochrome P450 2E1 (CYP2E1).
Furan is released from Polyethylene Terephthalate plastics and is found in 51 recorded sources. These include drinking water and water supply; household items such as watch chains and watch cases; and building and construction materials including roofs, ladders, floors, ceilings, and fencing. It is also found in electrical and electronic equipment, such as antennas, amplifiers, coils, adjustable resistors, and auxiliary devices. Additionally, it is present in household cleaning and consumer products, including soap detergents, perfumes within detergents and soaps, bleaching agents, cigar cigarettes, and other smoking requisites. Within food, food processing, and cookware, furan is associated with food contact materials, food preservation, the preparation of vinegar, the preparation of wine or sparkling wine, and fermentation processes for beer. Exposure to furan can occur through oral, inhalation, and touch routes.
Belongs to the class of organic compounds known as heteroaromatic compounds. Heteroaromatic compounds are compounds containing an aromatic ring where a carbon atom is linked to an hetero atom.
carcinogenic agent (PMC8773188 , PMC9407134 )?A role played by a chemical compound which is known to induce a process of carcinogenesis by corrupting normal cellular pathways, leading to the acquistion of tumoral capabilities.
Furan is a potent hepatotoxin and hepatocarcinogen in rodents, causing hepatocellular adenomas and carcinomas in rats and mice, and high incidences of cholangiocarcinomas in rats at doses ≥ 2 mg/kg bw. A genotoxic mode of action cannot be excluded for furan-induced tumor formation. Furan is metabolized by cytochrome P450 (CYP) enzymes, predominantly CYP2E1, to its major metabolite cis-2-butene-1,4-dial (BDA, maleic dialdehyde), a highly reactive electrophile identified as the key mediator of furan toxicity and carcinogenicity. Furan-mediated effects on glutathione (GSH) levels and cell viability can be suppressed by the CYP inhibitor 1-phenylimidazole and increased by pretreatment of rats with acetone (a CYP2E1-inducing agent), indicating that furan cytotoxicity depends on its metabolic activation. BDA has been shown to react with cellular nucleophiles such as GSH and amino acids and to cause cross-links between thiols and amino groups, giving rise to lactam and pyrrole derivatives. Furan reduced the percentage of DNA in the comet tail in turkey liver fetal hepatocytes. Furan was also shown to induce chromosomal aberrations and sister chromatid exchanges (SCEs) in Chinese hamster ovary (CHO) cells. A statistically significant increase of micronucleated cells was recently reported in the spleen of furan-treated mice. A reduction of percentage of DNA in comet tail in liver cells was observed following treatment of turkey fetuses in ovo. Exposure to furan at doses associated with increased tumor incidences initially causes hepatocellular necrosis, accompanied by inflammation and sustained regenerative proliferation of hepatocytes, which may present key events in furan-induced hepatocellular carcinogenicity. Subcapsular and centrilobular necrosis accompanied by markedly increased liver enzymes is the primary response to furan treatment. The involvement of inflammatory processes in furan toxicity is also reflected by increased expression of cytokines and other inflammation-associated genes, such as IFN-γ, IL-1β, IL-6, IL-10, and components of the complement system, which may, however, also derive from lesions involving the biliary tract. Indeed, increased production of reactive oxygen species in response to furan is suggested by immunohistochemical detection of 8-oxo-dG within nuclei of hepatocytes of centrilobular areas following high-dose exposure and changes in the expression of genes responsive to oxidative stress in rats and/or mice. (1)
Cancer is a group of diseases involving abnormal cell growth with the potential to invade or spread to other parts of the body. Possible signs and symptoms include a lump, abnormal bleeding, prolonged cough, unexplained weight loss, and a change in bowel movements. There are over 100 types of cancers affect humans. The risk of developing certain cancers can be reduced by not smoking, maintaining a healthy weight, not drinking too much alcohol, eating plenty of vegetables, fruits and whole grains, vaccination against certain infectious diseases, not eating too much processed and red meat and avoiding too much sunlight exposure. Cancer is often treated with some combination of radiation therapy, surgery, chemotherapy and targeted therapy. The majority of cancers, some 90–95% of cases, are due to genetic mutations from environmental and lifestyle factors. The remaining 5–10% are due to inherited genetics.
Soil?Soil serves as a critical medium for plant growth and sustains various ecological functions; however, it can become a reservoir for synthetic chemical contamination.
Stormwater runoff?Stormwater runoff refers to the flow of rainwater or melted snow that does not soak into the ground and instead collects pollutants as it travels over impervious surfaces such as roads and parking lots.
Drinking water?Drinking water can be a medium for synthetic chemical contamination, often originating from various industrial processes and agricultural practices.
Ballast water?Ballast water, taken on by ships to maintain stability and balance, often contains a diverse array of microorganisms, including bacteria, viruses, and plankton.
Bilge water?Bilge water is a byproduct generated from the accumulation of water in the lowest part of a ship's hull, which may include a mixture of seawater, oil, fuel residues, and various contaminants.
Brushes?Brushes used in personal care and cosmetics can be a source of synthetic chemical contamination due to the materials and coatings used in their manufacturing.
Food contact materials?Food contact materials refer to substances and products that are intended to come into contact with food during processing, packaging, or preparation.
Ceilings?Ceilings in built environments can be a source of synthetic chemical contamination due to the materials used in their construction and finishes.
Fencing?Fencing materials, particularly those used in construction and landscaping, can be a source of synthetic chemical contamination due to the treatments and coatings applied for durability and weather resistance.
Floors?Floors in built environments can be a significant source of synthetic chemical contamination due to the materials and finishes used in their construction.
Ladders?Ladders, commonly used in various construction and maintenance activities, can become a source of synthetic chemical contamination due to the materials and coatings applied during their manufacture and use.
Stairs And Ramps?Stairs and ramps in construction are often treated with various synthetic chemicals to enhance durability, slip resistance, and weather resistance.
Tents Or Canopies?Tents and canopies used in various applications can be a source of synthetic chemical contamination primarily due to the materials from which they are made.
Adjustable Resistors?Adjustable resistors, commonly used in various electronic devices, can contribute to synthetic chemical contamination through the materials and substances used in their manufacturing and disposal.
Amplifiers?Amplifiers, commonly used in various electronic devices to enhance signal strength, can be a source of synthetic chemical contamination due to the materials and processes involved in their production and disposal.
Antennas?Antennas, commonly used in communication technologies, can be a source of synthetic chemical contamination through the materials and coatings used in their construction.
Communication Cables Or Conductors?Communication cables or conductors are essential components in the transmission of data and signals in various applications, including telecommunications and networking.
Conductors Or Conductive Bodies Characterised By The Conductive Materials?Conductors, or conductive bodies, are materials that allow the flow of electrical current, typically made from metals such as copper, aluminum, or silver.
Cores Yokes Or Armatures?Cores, yokes, or armatures are components commonly found in electrical devices, used to facilitate the magnetic and electrical functions within motors, transformers, and generators.
Discharge Lamps?Discharge lamps, including fluorescent and high-intensity discharge (HID) lamps, are commonly used for lighting applications due to their energy efficiency and brightness.
Electric Switches?Electric switches, integral components in numerous devices, can be a source of synthetic chemical contamination due to the materials and manufacturing processes involved in their production.
Electrically Stimulated Smoking Devices?Electrically stimulated smoking devices, commonly known as e-cigarettes or vape pens, utilize electrical components to heat a liquid solution, often containing nicotine, flavorings, and other additives, to produce an aerosol for inhalation.
Electrodes?Electrodes, used in various electrical and electronic applications, can be a source of synthetic chemical contamination due to the materials from which they are constructed and the processes involved in their manufacturing.
Emergency Protective Devices?Emergency protective devices, such as circuit breakers and surge protectors, are essential components in electrical systems designed to prevent damage from overcurrent and surges.
Fixed Capacitors And Their Manufacture?Fixed capacitors are passive electronic components used to store and release electrical energy, playing a critical role in various circuits.
Gas Filled Discharge Tubes With Solid Cathode?Gas Filled Discharge Tubes with Solid Cathodes are electrical components that facilitate the flow of current by ionizing gas within a sealed tube.
Hybrid Capacitors?Hybrid capacitors are energy storage devices that combine the properties of electrolytic and supercapacitors, utilizing a combination of electrochemical principles to achieve higher energy density and power density.
Line Transmission Systems?Line Transmission Systems, commonly used for the distribution of electrical energy, can be a source of synthetic chemical contamination through the insulation materials and coatings utilized in their construction.
Loudspeakers?Loudspeakers, as components in audio systems, can be sources of synthetic chemical contamination primarily due to the materials used in their construction.
Magnets?Magnets, commonly used in various electrical and electronic applications, can be a source of synthetic chemical contamination due to the materials used in their production.
Microphones?Microphones, as components in various electronic devices, can be sources of synthetic chemical contamination due to the materials used in their construction.
Power Cables?Power cables are used to transmit electrical energy and are typically composed of conductive materials, insulation, and protective coatings.
Superconducting Magnets And Superconducting Coils?Superconducting magnets and coils are utilized in various applications that require strong magnetic fields, such as magnetic resonance imaging (MRI) and particle accelerators.
Superconductive Or Hyperconductive Conductors Cables Or Transmission Lines?Superconductive or hyperconductive conductors, including cables and transmission lines, are materials that exhibit zero electrical resistance under specific conditions, typically at low temperatures.
Television Systems?Television systems can be a source of synthetic chemical contamination due to the various materials and components used in their manufacture and operation.
Thin Magnetic Films?Thin magnetic films are layers of magnetic material ranging from a few nanometers to several micrometers in thickness, commonly used in applications such as magnetic sensors, data storage devices, and electronic components.
Food Preservation?Food preservation often involves the use of synthetic chemicals, such as preservatives, flavor enhancers, and color additives, to extend shelf life and enhance the sensory qualities of food products.
Preparation Of Vinegar?Vinegar is produced through the fermentation of ethanol by acetic acid bacteria, resulting in a solution that typically contains 4-8% acetic acid.
Preparation Of Wine Or Sparkling Wine?The preparation of wine or sparkling wine involves various stages, including fermentation, aging, and bottling, which can introduce potential sources of synthetic chemical contamination.
Bleaching Agents?Bleaching agents are chemical substances used to whiten or lighten materials, often employed in various cleaning products for their stain removal and disinfecting properties.
Other Smoking Requisites?Other smoking requisites, including items such as lighters, matches, and rolling papers, can introduce synthetic chemical contamination through various components and additives.
Perfumes Within Detergents And Soaps?Perfumes within detergents and soaps are synthetic fragrance compounds added to enhance the sensory experience of cleaning products.
Soap Detergents?Soap detergents are synthetic surfactants designed to enhance the cleaning efficacy of water by reducing surface tension, allowing for better interaction with dirt and grease.
Tobacco Pipes?Tobacco pipes, often made from materials such as plastic, wood, or metal, can serve as sources of synthetic chemical contamination due to the residues left by tobacco products.
Tobacco Smoke Filters?Tobacco smoke filters are designed to reduce the inhalation of harmful substances in cigarette smoke, including tar and other particulate matter.
Watch Cases?Watch cases, often made from synthetic materials such as plastics and metal alloys, can be a source of chemical contamination due to the presence of additives and coatings used in their production.
Watch Chains?Watch chains, often made from various metals and synthetic materials, can be a source of chemical contamination due to the presence of coatings, adhesives, and plasticizers used in their manufacturing.
Making Cigars?The process of making cigars involves several steps, including the cultivation of tobacco, fermentation, and the application of various additives to enhance flavor and preservation.
Manufacture Of Iron Or Steel?The manufacture of iron or steel involves various processes, including smelting, refining, and alloying, which can result in the release of synthetic chemicals and contaminants.
Manufacture Preparation Of Tobacco Products?The manufacture and preparation of tobacco products involve various processes that can result in the introduction of synthetic chemicals into the environment.
Paper Making Machines?Paper making machines utilize various synthetic chemicals throughout the production process, including additives, coatings, and bleaching agents.
Anchoring Equipment?Anchoring equipment, commonly used in marine applications, can be a source of synthetic chemical contamination due to the materials and coatings utilized in their manufacturing.
Buoys?Buoys, often used for navigation and marine monitoring, can be sources of synthetic chemical contamination due to the materials and coatings employed in their construction.
Life Buoys?Life buoys, commonly used in marine environments for safety and rescue operations, can be a source of synthetic chemical contamination due to the materials used in their production.
Lifeboats?Lifeboats, used for emergency evacuation at sea, can be a source of synthetic chemical contamination due to the materials and substances used in their construction and maintenance.
Marine Propulsion Or Steering?Marine propulsion and steering systems often rely on various synthetic chemicals, including lubricants, fuels, and hydraulic fluids.
Ship Hulls?Ship hulls are often treated with various synthetic chemicals to enhance durability, prevent corrosion, and inhibit the growth of marine organisms.
Ships?Ships, as vehicles for international trade and transportation, can be significant sources of synthetic chemical contamination in marine environments.
Molluscicides?Molluscicides are synthetic chemicals specifically designed to control and eliminate mollusks, such as snails and slugs, which can be detrimental to crops and agricultural productivity.
Nematocides?Nematocides are synthetic chemicals specifically designed to control nematodes, which are microscopic roundworms that can cause significant damage to crops and plants.
Rodenticides(1)?Rodenticides are synthetic chemicals specifically formulated to control rodent populations, serving as a crucial tool in managing pests that can damage crops and spread diseases.
Rodenticides?Rodenticides are chemical substances specifically designed to control rodent populations by causing death through various mechanisms, including anticoagulation or neurotoxicity.
Aftersun Products?Aftersun products are designed to soothe and hydrate the skin after sun exposure, often containing various synthetic chemicals such as emollients, preservatives, and fragrances.
Anti Perspirants Or Body Deoderants?Antiperspirants and body deodorants commonly contain synthetic chemicals such as aluminum compounds, parabens, and synthetic fragrances.
Body Washing Or Cleaning Implements?Body washing or cleaning implements, such as synthetic sponges, loofahs, and washcloths, can be sources of synthetic chemical contamination due to the materials used in their production.
Depilatories?Depilatories are products designed to remove unwanted hair through the application of synthetic chemicals that break down the protein structure of hair, facilitating its removal.
Essential Oils Or Perfumes?Essential oils and perfumes are complex mixtures of volatile compounds derived from natural or synthetic sources, commonly used for their aromatic properties.
Eye Makeup Products?Eye makeup products, including mascaras, eyeliners, and eyeshadows, often contain a variety of synthetic chemicals such as pigments, preservatives, and film-forming agents.
Lip Care Products?Lip care products, including lipsticks, balms, and glosses, often contain a variety of synthetic chemicals such as parabens, phthalates, and synthetic fragrances.
Lip Makeup Products?Lip makeup products, such as lipsticks, lip glosses, and lip liners, often contain a variety of synthetic chemicals, including pigments, preservatives, and emollients.
Manicure Pedicure?Manicure and pedicure procedures often involve the use of various synthetic chemicals, including solvents, nail polishes, and nail adhesives.
Card Games?Card games often utilize synthetic materials for playing cards and associated gaming equipment, which may contain various chemicals such as polyvinyl chloride (PVC), plastics, and dyes.
Toys?Toys, particularly those made from synthetic materials such as plastics, can be a source of chemical contamination due to the presence of various additives and compounds used in their production.
Anthraquinone Dyes?Anthraquinone dyes are a class of synthetic organic compounds characterized by their vibrant colors and stability, making them widely used in various applications, particularly in coloring textiles and leather.
Azo Dyes?Azo dyes are synthetic organic compounds characterized by the presence of one or more azo groups (-N=N-), which are widely used for coloring textiles, leather, and furnishings.
Buckles?Buckles, commonly used as fasteners in clothing, accessories, and furniture, can be a source of synthetic chemical contamination due to the materials and coatings employed in their production.
Buttons?Buttons, often made from synthetic materials such as polyester, nylon, or polycarbonate, can be a source of synthetic chemical contamination during their production, use, and disposal.
Footwear?Footwear production often involves the use of various synthetic chemicals, such as adhesives, dyes, and treatments, which can contribute to environmental contamination.
Headwear?Headwear made from synthetic materials often incorporates chemicals used in the manufacturing and finishing processes, such as dyes, flame retardants, and water repellents.
Purses Luggage Hand Bags?Purses, luggage, and handbags are often manufactured using synthetic materials such as polyvinyl chloride (PVC), polyurethane, and various types of nylon.
Ropes?Ropes manufactured from synthetic fibers, such as polypropylene, nylon, and polyester, are widely used in various applications, including marine, construction, and outdoor activities.
Snap Fasteners?Snap fasteners, commonly used in clothing and upholstery, can be made from various synthetic materials, including plastics and metal alloys.
Surface Finishing Of Leather?Surface finishing of leather often involves the use of various synthetic chemicals, including dyes, resins, and finishing agents.
Transfer Printing?Transfer printing is a process used to apply designs and patterns onto various substrates, commonly utilizing synthetic dyes and inks that can contain hazardous chemicals.
Yarns Or Threads?Yarns or threads used in textiles can be a source of synthetic chemical contamination due to the production processes and treatments they undergo.
Fire Fighting Gels?Fire fighting gels are synthetic chemical formulations designed to enhance fire suppression effectiveness by creating a protective barrier against heat and flames.
Gaseous Fire Fighting?Gaseous fire fighting systems utilize synthetic chemicals, such as halocarbons and inert gases, to suppress fires through chemical and physical processes.
Non-PFAS Fire Fighting Foam?Non-PFAS fire fighting foam refers to fire suppression agents that do not contain per- and polyfluoroalkyl substances (PFAS), which are synthetic chemicals known for their water- and grease-resistant properties.
PFAS Fire Fighting Foam?PFAS fire fighting foam refers to a class of synthetic foams containing per- and polyfluoroalkyl substances (PFAS), which are designed to suppress flammable liquid fires.
Solid Fire Fighting Substances?Solid fire fighting substances, such as certain types of dry chemical powders, are used in fire suppression applications to extinguish flames and prevent fire spread.
Airplanes And Helicopters?Airplanes and helicopters are significant sources of synthetic chemical contamination primarily through the use of aviation fuels, lubricants, and de-icing agents.
Unmanned Aerial Vehicles?Unmanned Aerial Vehicles (UAVs), commonly known as drones, utilize various synthetic chemicals in their manufacturing, operation, and maintenance processes.
Nitrogenous Fertilisers?Nitrogenous fertilizers are synthetic chemical compounds primarily used to enhance plant growth by supplying essential nitrogen, a crucial nutrient for photosynthesis and protein synthesis.
Cements?Cements are a composite material primarily used as a binding agent in construction applications, formed by the calcination of limestone and clay minerals at high temperatures.
Clay Wares?Clay wares are ceramic products made from natural clay, often utilized in various construction applications such as tiles, bricks, and sanitary ware.
Glass Coatings?Glass coatings are synthetic chemical formulations applied to glass surfaces to enhance properties such as durability, UV resistance, and aesthetic appeal.
Lime?Lime, primarily comprised of calcium oxide (CaO) or calcium hydroxide (Ca(OH)₂), is widely used in various applications, including as a key ingredient in mortars, plasters, and cement.
Non Oxide Glass?Non-oxide glass refers to a category of glasses primarily composed of materials other than silicon dioxide, such as boron oxide or phosphorous oxide.
Silica Free Oxide Glass?Silica Free Oxide Glass is a type of glass that is produced using alternative materials to traditional silica-based formulations.
Silica Glass?Silica glass, primarily composed of silicon dioxide (SiO2), is widely used in various applications, including windows, glass facades, and insulation materials.
Nanotechnology?Nanotechnology involves the manipulation of materials at the molecular or atomic level, typically within the range of 1 to 100 nanometers.
Mining Or Quarrying?Mining and quarrying operations can lead to synthetic chemical contamination through the release of various pollutants associated with the extraction and processing of minerals.
Blackboards?Blackboards, traditionally made from slate or coated wood, can also be produced using synthetic materials that may contain various chemicals.
Bookbinding?Bookbinding involves the use of various synthetic chemicals, including adhesives, inks, and coatings, which can contribute to environmental contamination.
Coloured Pencils?Coloured pencils are commonly used tools for artistic expression and education, composed primarily of a wood casing and a core made from a mixture of pigments, binders, and waxes.
Combination Pens?Combination pens, which typically contain both ink and additional functionalities such as highlighters or stylus tips, may contribute to synthetic chemical contamination primarily through their ink formulations and plastic components.
Embossing Machines?Embossing machines are industrial devices used to create raised patterns or designs on materials, including paper and fiber products.
Pencil Sharpener?A pencil sharpener, commonly used in various settings for maintaining the sharpness of pencils, can be a source of synthetic chemical contamination primarily through the materials from which it is constructed.
Coating Compositions?Coating compositions, which include paints, sealants, and varnishes, are formulated with a variety of synthetic chemicals such as solvents, resins, pigments, and additives.
Chemical Igniters?Chemical igniters are substances or devices designed to initiate combustion in various applications, often found in products like lighters, candles, and certain household cleaning agents.
Leather Tanning?Leather tanning is a process that transforms raw animal hides into durable leather through the application of various chemicals, including chromium salts, aldehydes, and vegetable tannins.
Sludge Treatment?Sludge treatment involves the processing of waste materials generated from wastewater treatment plants, which often contain a variety of organic and inorganic substances.
Water, Wastewater, & Sewage Treatment?Water, wastewater, and sewage treatment processes are critical for managing and mitigating pollutants in water systems.
Moro S, Chipman JK, Wegener JW, Hamberger C, Dekant W, Mally A: Furan in heat-treated foods: formation, exposure, toxicity, and aspects of risk assessment. Mol Nutr Food Res. 2012 Aug;56(8):1197-211. doi: 10.1002/mnfr.201200093. Epub 2012 May 29. [PubMed: 22641279]
International Agency for Research on Cancer (2014). IARC Monographs on the Evaluation of Carcinogenic Risks to Humans. - http://monographs.iarc.fr/index.php
![Amine oxidase [flavin-containing] A structure](https://cdn.rcsb.org/images/structures/2bxr_assembly-1.jpeg)
