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| E462 | |
|---|---|
| Name | E462 |
| Other names | Mono- and diglycerides of fatty acids |
| Cas number | 67701-08-0 (mixture) |
| E number | E462 |
| Appearance | Pale yellow to amber viscous liquid or soft solid |
| Solubility | Insoluble in water; soluble in oils and organic solvents |
E462 is the food additive class commonly described as mono- and diglycerides of fatty acids used worldwide as emulsifiers and stabilizers in processed foods. It is a mixture derived from glycerol and fatty acids and appears on ingredient lists as an emulsifier approved in many jurisdictions. Manufacturers and regulators discuss E462 in the context of baking, confectionery, dairy, and industrial food formulations.
E462 denotes a class of esters formed by the esterification of Glycerol with long‑chain fatty acids derived from sources such as Palm oil, Soybean oil, Rapeseed oil, and animal fats from Cattle or Swine. The mixture primarily contains 1‑monoacylglycerols, 2‑monoacylglycerols, and 1,2‑diacylglycerols with variable fatty acid chain lengths and degrees of unsaturation, including palmitic, stearic, oleic, and linoleic acid residues commonly found in triglycerides of Olive oil and Sunflower oil. Structural isomerism (sn‑1, sn‑2, sn‑3 positions on the glycerol backbone) and the relative proportions of mono‑ versus diesters determine physicochemical properties; these stereochemical arrangements are discussed alongside studies involving NMR spectroscopy and Mass spectrometry in the literature. Industrial samples can contain minor amounts of free glycerol and free fatty acids; therefore, specifications often reference parameters used by bodies such as the Codex Alimentarius Commission.
Commercial production of E462 is achieved by chemical or enzymatic processes. Chemical glycerolysis typically employs high temperature and catalysts to react refined vegetable or animal triglycerides with glycerol, a process used by companies supplying the Food and Agriculture Organization market. Enzymatic routes use lipases sourced from organisms like Candida antarctica or Rhizomucor miehei to produce tailored mono‑ and diglyceride profiles under milder conditions; these methodologies are discussed in patents filed by multinational firms such as Unilever and Cargill. Downstream processing includes neutralization, bleaching, vacuum stripping, and deodorization techniques common to the edible oil refining industry. Raw material choice links supply chains to agricultural producers in regions associated with Palm kernel oil, Soybean agriculture in Brazil, and Rapeseed cultivation in Canada and France.
E462 functions primarily as an emulsifier, enabling dispersion of hydrophobic and hydrophilic phases in products such as Chocolate, Margarine, Mayonnaise, Bread, and Ice cream. In bakery systems it improves dough handling and crumb structure, interacting with starch components in formulations resembling methods described by researchers at institutions like the American Institute of Baking and Campden BRI. In confectionery it modifies fat crystallization behavior alongside ingredients used by Mars, Incorporated and The Hershey Company, while in dairy analogues and plant‑based beverages it helps stabilize oil‑in‑water emulsions similar to applications by companies like Alpro and Danone. E462 also serves as a whipping aid in cream products and as an anti‑staling agent in packaged goods, often used in combination with lecithin from Egg or Soy and monoacylglycerol‑stearic acid complexes explored in research at Universidade de São Paulo.
Toxicological evaluations of mono‑ and diglycerides have been performed by expert committees including the Joint FAO/WHO Expert Committee on Food Additives and panels within the European Food Safety Authority. Typical assessments report low acute toxicity, absence of genotoxicity at relevant concentrations, and low systemic toxicity in subchronic studies; safety conclusions reference metabolic pathways that hydrolyze esters to glycerol and fatty acids, substrates also present in normal human metabolism linked to Triglyceride turnover. Allergenic potential depends on source lipids; for example, residues from Soybean or Peanut oils may carry trace proteins of regulatory concern in jurisdictions with food allergy labeling requirements. Dietary exposure estimates consider use levels across categories such as baked goods, emulsified sauces, and processed spreads, with monitoring programmes run by national agencies like Food Standards Australia New Zealand and the US Food and Drug Administration.
E462 is assigned the E‑number in the European Union and is listed in additive schedules by regulators including the US Food and Drug Administration (as a permitted substance in foods under specific conditions) and the Codex Alimentarius. Labeling rules vary: in the European Union and many jurisdictions the ingredient may be declared as "mono‑ and diglycerides of fatty acids" on packaging; where allergen control is required, the source of the fatty acids (e.g., Soybean oil) may trigger additional declaration under laws such as the EU Food Information for Consumers Regulation or national statutes like the US Food Allergen Labeling and Consumer Protection Act. Organic certification standards by agencies such as USDA National Organic Program and Ecocert may restrict or specify allowable processing aids and sources.
Quality control relies on chromatographic and spectroscopic techniques to determine mono‑/di‑/triacylglycerol composition, free glycerol, peroxide value, and acid value. Gas chromatography with flame ionization detection (GC‑FID) or GC‑MS after derivatization is widely used by laboratories in industry and academia—for example, methods published by analytical groups at Eurofins and Nestlé Research Center. High‑performance liquid chromatography (HPLC) and supercritical fluid chromatography (SFC) provide separation of positional isomers, while nuclear magnetic resonance (NMR) characterizes stereochemistry; peroxide and anisidine values assess oxidative quality following methods harmonized by organizations like AOAC International. Regulatory specifications set limits for contaminants such as heavy metals and trans isomers and are enforced by national laboratories such as those of the UK Food Standards Agency.
Category:Food additives