Styrene is a constituent of many plastics and Styrofoam. High concentrations (as high as 40 ppm) occur in cinnamon because styrene is the product of oxidation of its major flavoring compound, cinnamaldehyde. Styrene Butadiene Rubber (SBR), which reduces dependence on natural rubbers and provides improved performance in applications such as vehicle tires (leading to improved fuel efficiency), conveyor belts, gaskets, and seals. Workers involved in styrene polymerization, rubber manufacturing, and styrene-polyester resin facilities and workers at photocopy centers may also be exposed to styrene. Styrene also occurs naturally in foods such as strawberries, cinnamon, coffee and beef. Styrene Acrylonitrile (SAN) plastic: used for food containers, tableware, bathroom fittings, and optical fibers. Estimated exposures are high for these uses (10 ppm for inhalation exposure and 1.7 to 5.5 g per day for skin exposure) but the estimates are based on conservative assumptions and hence are highly uncertain. Synthetic styrene, which is chemically identical to naturally occurring styrene, is manufactured as a chemical building block for materials used to make packaging, insulation, automobiles, electronics, boats, and recreational vehicles. Children may be exposed to small amounts of styrene through mouthing of plastic toys made of styrene-containing polymers. Styrene is often detected in ambient air as a result of releases from natural sources, industrial processes and products, and human activities. The following sections review the current knowledge of styrene exposure to workers and the general public. Polystyrene is made by stringing together, or polymerizing, styrene, a building-block chemical used in the manufacture of many products. 400 E Joppa Road, Suite 108 Typical styrene air concentrations inside homes range from 0.2 to 0.9 ppb. Central tendency and upper bound estimates of personal styrene exposure concentrations range from about 0. In addition, FDA has approved styrene as a food additive – it can be added in small amounts to baked goods, frozen dairy products, candy, gelatins, puddings and other food. Other risks include synthetic chemical additives such as colorants. Food simulants were responsible for higher migration (0.37% in 100% ethanol). Low levels of styrene occur naturally in a variety of foods, such as fruits, vegetables, nuts, beverages, and meats. The general public may be exposed to styrene from environmental sources, such as from industrial emissions, engine exhaust, tobacco smoke, certain consumer, office, and household products, and styrenic building and furnishing materials, or from ingestion of styrene naturally present in foods and beverages or from migration from food packing materials. The analysis of foods was by automated headspace gas chromatography/mass spectrometry (GC/MS) in the selected ion mode. for 202 days. Survey In July 2012, a third party electronically submitted survey forms regarding polystyrene usage to Towson, MD 21286 Food Styrene has been found in food packaged in polystyrene containers, especially yoghurt (2.5– 34.6 µg/kg). Styrene is widely used to make plastics and rubber. Is there a medical test to determine whether I have been exposed to styrene? In response to a separate food additive petition from the Styrene Information and Research Center, the FDA is granting the petition by amending its food … In some cases, the presence of styrene in foods can make carcinogenic, hematological, cytogenetic, and neurotoxic issues. For more information about this message, please visit this page: Agency for Toxic Substances & Disease Registry. What recommendations has the federal government made to protect human health? Although styrene monomer is considered as a non-toxic compound, its migration into the foods can downgrade sensorial properties as well as resulting in health problems. Although the National Toxicology Program listed styrene as a reasonably anticipated carcinogen in 2011, the styrene listing was based on studies of workers exposed to high levels of styrene. FDA Determines Polystyrene Is Safe for Use in Food … 202-787-5996. for 216 days and 0.5 mg/kg b.w. recognizing, evaluating, and treating illnesses resulting from exposure to hazardous substances. Some examples of workers at risk of being exposed to styrene include the following: Workers in … Polystyrene can be solid or … Some consumer products may release styrene with use. The foods tested were wheat, oats, peanuts, pecans, coffee beans, tomatoes, peaches, strawberries, cinnamon, beef, chicken, and milk. Styrene in food packaging materials may volatilize and be inhaled by the consumer, or leach into foods and be ingested. Polystyrene is made by stringing together (polymerizing) styrene, a substance that also occurs naturally in foods such as strawberries, cinnamon, coffee and beef. ATSDR can also tell you the location of occupational and environmental health clinics. The average and upper-bound estimates of styrene ingestion by a child by mouthing is 0.0001 mg to 0.0004 mg per day. History [ edit ] In 1839, the German apothecary Eduard Simon isolated a volatile liquid from the resin (called storax or styrax (Latin)) of the American sweetgum tree ( Liquidambar styraciflua ). Food. Birds may also use foam for nesting material. The general public is exposed to very low levels of styrene from air. Although localized contamination of drinking water sources can occur in connection with specific sources, the general population is not regularly exposed to measurable levels of styrene in drinking water. Low levels of styrene occur in foods from natural sources or from transfer from styrene-based packaging material. The samples were collected in a manner that avoided contact with styrene or … The central tendency and upper-bound time-weighted average styrene concentrations for workers engaged in open-mold processes is about 30 ppm and 60 ppm, respectively, assuming no respiratory protection, and around 4 ppm and 7 ppm, respectively, with protection. The highest inhaled styrene concentrations occur in smokers. Styrene is found in tobacco smoke. Small amounts of styrene can be transferred to some food from polystyrene-based food-contact items, such as drinking cups, plates, and other containers. The determination of residual styrene in polystyrene food packaging polymers by a reverse phase liquid chromatographic method is described. Food Additives and Contaminants 2007 , 24 (2) , … Estimate the expected migration of styrene from the polystyrene products fabricated from the resins; and Calculate dietary exposure to styrene from the food-contact uses of polystyrene. Bottom of a vacuum-formed cup; fine details such as the glass and fork food contact materials symbol and the resin identification code symbol are easily molded Polystyrene (PS) / ˌpɒliˈstaɪriːn / is a synthetic aromatic hydrocarbon polymer made from the monomer known as styrene. 888-232-6348 (TTY) If you continue to use this site we will assume that you agree to our. It’s used in insulation, fiberglass, plastic pipes, automobile parts, shoes, drinking cups and other food containers, and carpet backing. Because these sections summarize the exposure information, specific references are not provided but are available upon request. These clinics specialize in Styrene is naturally present in many foods, such as cinnamon, beef, coffee beans, peanuts, wheat, oats, strawberries and peaches. In the construction industry, it is used to produce pipe products, tanks, lighting fixtures, insulation, and various corrosion resistant and rubber products. Food Chemistry $ (1982) 97-107 STYRENE POLYMERS AND FOOD PACKAGING C. A. BRIGHTON 1 Gatesdene Close, Little Gaddesden, Berkhamsted, Herts HP4 1PB, Great Britain (Received: 8 September, 1981) ABSTRACT Polymers based on styrene monomer can be produced with a wide range of properties by co-polymerisation and the incorporation of rubber impact improvers. Environmental hazard - The foam form in particular is often mistaken as food by both domesticated and wild animals. Indoor air concentrations of styrene are important as most individuals spend the majority of their time indoors and because concentrations of styrene are typically higher in buildings than in ambient air. These levels are significantly lower than ingestion from dietary exposures indicating that mouthing of styrenic toys is unlikely to be a significant source of children’s exposure to styrene. Styrene occurs naturally in many foods and beverages, although it is not clear in some cases whether it is formed endogenously or if its presence is due to partitioning from the environment or food packaging materials. Closed-mold processes reportedly produce central tendency and upper-bound time-weighted average styrene concentrations of about 11 ppm and 18 ppm, respectively. Exposure to styrene occurs in workplaces that manufacture styrene or use styrene to produce important polymers and co-polymers of industrial, consumer, and medical importance, including: polystyrene, styrene butadiene rubber, unsaturated polyester resins, styrene butadiene latexes, acrylonitrile–butadiene–styrene, and styrene–acrylonitrile. Consumer use of liquid and paste resins containing styrene (used mostly for automobile and boat repair) may result in inhalation and skin exposures. Email: Contact CDC-INFO. At high doses, it could also affect kidney function . Note: Javascript is disabled or is not supported by your browser. Created for consumers, educators, the media, and industry employees, youknowstyrene.org is a reliable, one-stop source of information on styrene and styrene-based products. Migration may be strongly influenced by the interaction of food components with the packaging material, as well as enhanced by microwaving. Styrene Information & Research Center for 58 days, 5 mg/kg b.w. We use cookies to ensure that we give you the best experience on our website. Styrene occurs naturally in many foods, such as cinnamon, beef, coffee beans, peanuts, wheat, oats, strawberries and peaches. Styrene is released into the air from some industrial facilities, including plastics and fiberglass manufacturers, and waste disposal sites. In 1991, when researchers found styrene in eggs, concern arose that the carcinogen's presence traced to the plastic cartons in which the eggs had been stored. Lookup at Google Scholar Styrene levels in 12 commodities were determined. Workers may also come into skin contact with styrene, however compared to the inhalation route where uptake through the lungs is high, only minimal amounts of styrene (< 5%) pass through the skin into the body. Low levels of styrene occur in foods from natural sources or from transfer from styrene-based packaging material. Low levels of styrene may be found in foods as a result of possible migration from polystyrene-based food packaging and as a result of its formation during the biodegradation of a wide variety of naturally occurring compounds with structures similar to styrene. Styrene is a petroleum by-product is used to make plastics, rubber, and resins that can be found in packaging, cups, plates, take-out containers, and packing peanuts. Styrene is commonly found at low concentrations in both raw agricultural commodities and processed foods. Styrene was administered 5 times per week in the form of an emulsion (vegetable oil and potato starch) according to three different dosing schedules. http://www.atsdr.cdc.gov/toxprofiles/styrene_addendum.pdf, Agency for Toxic Substances and Disease Registry, insulation for electrical uses (i.e., wiring and appliances), insulation for homes and other buildings, fiberglass, plastic pipes, automobile parts, drinking cups and other "food-use" items, industries using or manufacturing styrene, 0.06-4.6 parts per billion (ppb) in outdoor air. In east Australia, 146 food samples packaged in … Styrene leaching increases with temperature and with certain foods (alcohol, oils or fat). The highest occupational styrene exposures occur during the production of fiber-reinforced polymer composites (FRP) by open-molding processes that involve manual application of materials. Annual average styrene air concentrations in the United States from 2012 to 2016 ranged from 0.03 to 0.05 ppb, with an overall five-year average of 0.05 ppb. No 6 is often present in takeout boxes too, and, when heated, could release styrene, linked to depression and fatigue. The U.S. Food and Drug Administration (FDA) announced that it is amending the food additive regulations to no longer permit the use of styrene as a synthetic flavoring substance and adjuvant in food because that use has been permanently abandoned by industry. But a new study illustrates why plastics cannot take the fall for all dietary styrene. Styrene present in residential indoor air can arise from multiple indoor and outdoor sources, such as automobile exhaust, tobacco smoke, certain consumer, office, and household products, and styrenic building and furnishing materials. 2 to 1.1 ppb, respectively, for non-smokers, and about 0.5 to 1.5 ppb, respectively for smokers. STYRENE MIGRATION CURVES AT 25°C MIGRATION OF STYRENE MONOMER 157 I I I I I I I I 120- (0 P x 100- n 0 *The levels of residual styrene in polystyrene food packages allowed by the FDA (1977)are 0.5'h (5000 ppm) fur fatty focds and 1 1 1for water-based ones. Less frequent exposures may occur from toys and consumer products made of styrene-containing polymers. Use of a food-consumption database with packaging information to estimate exposure to food-packaging migrants: expoxidized soybean oil and styrene monomer. For this reason, some items on this page will be unavailable. In other milk products and honey, some tens of micrograms were found up to 120 days after packaging (1). The primary routes of styrene exposure for the general public are by inhalation of air and ingestion of food containing amounts of styrene. Reassessment of Styrene by EFSA on the Horizon March 8, 2019 The European Commission (EC) asked the European Food Safety Authority (EFSA) to update its risk assessments for styrene and four other food contact materials (FCM) that are authorized in the EU’s Plastics Regulation, (EU) No 10/2011. After a tough winter, Im sure everyone will be taking every opportunity to soak up the sun and enjoy the warmth! II. Workplaces have the highest airborne concentrations of styrene, although there is significant variability among types of facilities and processes. The level of styrene detected in the foods was always fat dependent. These were 250 mg/kg b.w. What happens to styrene when it enters the environment? Migration of styrene from thermoset polyester cookware into foods has been studied during normal cooking applications and for the fatty food simulant olive oil under high temperature test conditions. A total of 60 food samples (yogurt, rice with milk, fromage, biogardes, and cheese) packed in polystyrene containers were collected from retail markets in Belgium, Germany, and the Netherlands. Studies have shown that the home is the locus of greatest exposure, followed by work and school. The average dietary exposures for children to adults reportedly range from 0.001 to 0.01 mg styrene per day. Styrene isn’t known to leach out of hard plastics, but some evidence suggests that it can leach out of foam food containers and cups when food or drinks are hot – not when they’re cold. The primary route of exposure of styrene to workers is by inhalation. Susan Genualdi, Patricia Nyman, Timothy Begley, Updated evaluation of the migration of styrene monomer and oligomers from polystyrene food contact materials to foods and food simulants, Food Additives & Contaminants: Part A, 10.1080/19440049.2013.878040, 31, 4, (723-733), (2014). The general population is not regularly exposed to measurable levels of styrene in drinking water. Low levels of styrene also occur naturally in a variety of foods such as fruits, vegetables, nuts, beverages, and meats. Styrene may also leach from polystyrene containers used for food products, but levels of styrene in food are very low. Styrene occurs naturally in many foods and beverages, although it is not clear in some cases whether it is formed endogenously or if its presence is due to partitioning from the environment or food packaging materials. How can families reduce the risk of exposure to styrene? The highest exposures to styrene occur in workplaces that produce styrene or use styrene to make other materials. End uses of styrene include food packaging, cabinets for electronics, CD holders, paper coatings, boat hulls and interior automotive components. Its finally warm and cookout season is upon us. Food. 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