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Introduction
E474, also called sucroglycerides or sucrose glycerol esters, are mixtures of sucrose esters of fatty acids (E473) and mono- and diglycerides of fatty acids (E471). They are produced by the interesterification of sucrose with triglycerides (edible oils) in the presence of a catalyst. The reaction produces a complex mixture containing sucrose mono-, di-, and polyesters along with mono-, di-, and triglycerides. This combination is not simply a physical blend of E473 and E471 but a true reaction product with unique interfacial properties.
Unlike pure sucrose esters (E473), sucroglycerides contain glycerol-based emulsifiers that provide additional functionality. They typically have HLB values of 7-11, making them suitable for oil-in-water emulsions with moderate to high fat content. E474 is particularly valued for its ability to stabilize emulsions containing both fat and protein without causing protein coagulation. It is approved in the EU as E474 but has limited use in the USA (not separately listed; often covered under E473 or E471 regulations depending on composition).
CAS Number
Mixture, no single CAS. Often referenced under 977038-19-7 (interesterification product).
Synonyms
Sucroglycerides, Sucrose glycerol esters, E474, Sucroesters with glycerides.
Topic Headings
1. Unique interfacial properties from mixed composition (detailed paragraph form)
When a pure emulsifier adsorbs to an oil-water interface, it forms a monolayer with a specific packing density and orientation. However, complex food systems often contain multiple surface-active components (proteins, phospholipids, other emulsifiers) that compete for interfacial space. E474 has an advantage because it contains several molecular species with different polarities and surface activities. The sucrose monoesters (high HLB) quickly adsorb to fresh interfaces and reduce interfacial tension rapidly. The mono- and diglycerides (low HLB) then penetrate between sucrose ester molecules, filling gaps and creating a condensed, highly stable interfacial film. The sucrose polyesters (very low HLB) remain in the oil phase but anchor the interface from the oil side. This three-component system produces an interfacial film that resists coalescence, flocculation, and Ostwald ripening better than any single emulsifier alone. In practice, emulsions stabilized with 0.3% E474 show no visible separation for 6-12 months, compared to 2-3 months with E471 alone or 4-6 months with E473 alone.
*2. Comparison with E473 and physical blends of E473+E471 (list form)*
• E474 vs E473 alone — E473 alone gives good emulsion stability but poor freeze-thaw resistance; E474 maintains stability through 5 freeze-thaw cycles (ice cream, frozen sauces).
• E474 vs physical blend (E473 + E471) — A physical blend often separates upon storage because components are not chemically bound; E474's components are produced together and have stronger synergistic interaction.
• E474 vs E475 (polyglycerol esters) — E475 gives excellent aeration but poor emulsion stability in acidic conditions; E474 works well at pH 3-8.
• E474 vs E471 alone — E471 alone stabilizes emulsions but produces larger droplet sizes (5-10 microns); E474 produces smaller droplets (1-3 microns), giving better mouthfeel and stability.
*3. Applications in dairy and non-dairy products (list form)*
• Non-dairy creamers (liquid and powder) — 0.2-0.5% prevents feathering in coffee better than E471 alone; combines benefits of E473 (protein protection) and E471 (fat stabilization).
• Ice cream — 0.2-0.4% improves overrun to 90-110%; reduces ice crystal growth during storage (better than E471 alone); gives creamier texture without increasing fat content.
• Whipped toppings (aerosol and cream types) — 0.3-0.6% produces stable foam with 200-300% overrun; holds shape for 2+ hours without drainage.
• Coffee whiteners (non-dairy) — 0.4-0.7% provides excellent whitening power and mouthfeel; no feathering even in low-pH (4.8) coffee.
• Dairy desserts (puddings, flans) — 0.3-0.5% prevents syneresis (water separation); improves creaminess and gloss.
• Margarine and low-fat spreads — 0.2-0.4% (low HLB grade) stabilizes water-in-oil emulsion; reduces spattering and improves spreadability.
4. Manufacturing process and quality parameters (paragraph form)
E474 is produced by heating sucrose, edible triglycerides (palm oil, soybean oil, sunflower oil), and an alkali catalyst (potassium carbonate or sodium methoxide) to 120-150°C under reduced pressure. The transesterification reaction proceeds for 2-4 hours, after which the mixture is cooled, neutralized with citric acid, and refined (decolorized, deodorized). The final product is a pale yellow to brown waxy solid or viscous paste. Key quality specifications (based on EU regulation): total sucrose esters content 40-60%, mono/diglycerides content 30-50%, free sucrose <5%, free glycerol <2%, acid value <10 mg KOH/g, saponification value 200-300 mg KOH/g. Melting point ranges from 35-55°C depending on fatty acid saturation. Storage stability: 12 months in sealed containers below 25°C; protect from light and moisture. E474 is sensitive to high temperatures (>100°C) and acidic conditions (pH <4), where hydrolysis may occur.
