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| E311 | |
|---|---|
| Name | E311 |
| Other names | Ethyl esters of fatty acids (commonly octanoate), ethyl octanoate (as representative) |
| IUPAC name | Ethyl octanoate (representative) |
| Formula | C10H20O2 (representative) |
| CAS number | 106-32-1 (ethyl octanoate) |
| Appearance | Colorless liquid |
| Density | 0.87 g·cm−3 (ethyl octanoate) |
| Boiling point | 215 °C (ethyl octanoate) |
| Solubility | Slightly soluble in water, soluble in ethanol, ether |
E311
E311 refers to a designation used in food additive classification systems for certain ethyl esters of medium-chain fatty acids; it is most commonly associated with ethyl octanoate as an illustrative compound. The term appears in regulatory lists and technical literature alongside other E-numbered additives and is relevant to food technologists, flavor chemists, and regulatory authorities. As an ester derived from fatty acids and ethanol, compounds grouped under this designation intersect with topics in organic chemistry, industrial chemistry, and food safety assessment.
The E311 label denotes an ethyl ester form of a medium-chain fatty acid within the context of the E-number system used by regulatory bodies in regions influenced by European nomenclature. In chemical nomenclature the representative species often cited is ethyl octanoate, whose systematic name is ethyl octanoate and whose structure is an ethyl ester of octanoic acid. Related ethyl esters include ethyl hexanoate, ethyl decanoate, and ethyl laurate, which are connected to fatty acids such as hexanoic acid, decanoic acid, and lauric acid respectively; these compounds are referenced in literature by researchers working at institutions like Nestlé, Mars, Incorporated, Kraft Foods Group, and laboratories affiliated with University of Oxford and Massachusetts Institute of Technology. Nomenclatural treatments in compendia published by organizations such as International Organization for Standardization and Codex Alimentarius Commission provide standardized naming conventions used in trade and regulation.
Within the E-number framework administered in part through regulatory systems influenced by the European Commission and standards from the Food and Agriculture Organization and World Health Organization, the E311 classification is applied to certain ester-based flavoring and aroma compounds. Ethyl esters, including ethyl octanoate, are used as flavoring agents in products produced by companies like Nestlé, Unilever, and PepsiCo to impart fruity, floral, or fatty notes, and are incorporated into confectionery, beverages, dairy analogues, and baked goods formulated by firms such as Mondelez International and Kellogg Company. Food scientists at institutions including Wageningen University, California Institute of Technology, and University of California, Davis study organoleptic contributions of these esters and their interactions with other additives regulated under directives issued by the European Food Safety Authority and national agencies like the Food Standards Agency.
Ethyl esters of medium-chain fatty acids are esters formed by Fischer esterification of corresponding carboxylic acids with ethanol or via transesterification of triglycerides. Representative properties—illustrated by ethyl octanoate—include an aliphatic hydrocarbon chain, an ester functional group, low polarity, moderate volatility, and characteristic aroma profiles; these attributes are discussed in texts from publishers such as Wiley and Springer. Industrial production pathways are employed by chemical manufacturers including BASF, DuPont, and Dow Chemical Company using catalysts such as sulfuric acid or acidic ion-exchange resins, and processes adapted by specialty firms like Givaudan and Firmenich for flavor-grade synthesis. Analytical characterization relies on techniques developed in laboratories at Massachusetts Institute of Technology, ETH Zurich, and Imperial College London using gas chromatography–mass spectrometry, nuclear magnetic resonance spectroscopy, and infrared spectroscopy.
Regulatory assessment of ethyl esters used as flavorings or processing aids involves toxicological review, acceptable daily intake determinations, and inclusion into positive lists maintained by authorities such as the European Food Safety Authority, United States Food and Drug Administration, and national bodies like Health Canada. Studies published by research groups at Harvard University, Johns Hopkins University, and Karolinska Institutet evaluate metabolism—typically hydrolysis to ethanol and the parent fatty acid—and potential effects, noting low acute toxicity at typical exposure levels in foods. Safety documentation from industry associations including the International Food Additives Council and testing laboratories such as Eurofins Scientific inform regulatory submissions. Maximum permitted levels, labelling obligations, and use-cases are governed by regulations and directives enacted by the European Commission, Codex Alimentarius Commission, and national legislatures.
Beyond food and flavoring, ethyl esters of medium-chain fatty acids serve roles in fragrances, solvent applications, plasticizers, and intermediates in chemical synthesis. Fragrance houses such as Givaudan, IFF, and Symrise utilize these esters in perfume accords marketed by luxury brands including LVMH, Chanel, and Estée Lauder Companies. In industrial chemistry, companies like BASF and Shell supply versions used as solvents or components in coatings and adhesives, while academic groups at MIT and Stanford University investigate bio-based production from feedstocks via enzymatic catalysis for sustainable chemistry initiatives supported by agencies like the European Commission and National Science Foundation.
The classification and use of ethyl esters trace to 19th-century organic chemistry research by chemists in laboratories at institutions such as University of Göttingen and University of Paris, with industrial scaling following advances by chemical firms in the early 20th century. The modern E-number system emerged through policy processes involving the European Economic Community and later the European Union, with revisions influenced by scientific assessments from the Joint FAO/WHO Expert Committee on Food Additives and regulatory updates by the European Food Safety Authority. Changes in nomenclature and substitution of trivial names with systematic nomenclature are documented in compendia published by IUPAC and adopted by agencies including the Food and Drug Administration and Codex Alimentarius Commission.
Category:Food additives