Egg Albumen
Overview
Egg Albumen, or egg white, is the clear liquid portion of an egg, constituting about 60% of its total weight. It consists primarily of water (90%) and proteins (10–12%), with ovalbumin being the dominant protein. Historically used in cooking, its industrial applications have expanded due to its functional properties, such as foaming stability and heat-induced gelation. In B2B contexts, egg albumen is traded in liquid, frozen, or dried powder forms. The powdered form, achieved through spray-drying, is preferred for its longer shelf life and ease of transport. It is a key ingredient in sectors demanding high-protein or texture-modifying additives.
Physical and Chemical Properties
Egg Albumen exhibits unique rheological and colloidal properties. Its viscosity increases with concentration, and it forms stable foams when whipped due to proteins like ovomucin. Upon heating, proteins denature and coagulate, forming gels—a critical feature for baking and meat processing. The pH of fresh egg white is alkaline (~9.0), but it shifts during storage. Its solubility in water makes it versatile for formulations, while its heat sensitivity requires careful processing. The presence of lysozyme also provides mild antimicrobial activity, though pasteurization is necessary for safety.
Main Applications
In the food industry, Egg Albumen is a multifunctional ingredient. It acts as a leavening agent in meringues and soufflés, a binder in processed meats, and a clarifier in brewing. Its gelling property is exploited in custards and low-fat products. Beyond food, it serves as a culture medium in vaccines and biotechnology due to its nutrient profile. Cosmetic formulations use it for its film-forming ability in masks and hair products. Recent research explores its potential in biodegradable packaging and drug delivery systems.
Safety and Storage
While Egg Albumen is generally safe, it is a common allergen, requiring clear labeling. Raw egg white contains avidin, which binds biotin, but this is neutralized by cooking. Microbial contamination (e.g., Salmonella) is mitigated through pasteurization or irradiation. Storage depends on the form: liquid albumen requires refrigeration (≤4°C) and has a short shelf life, while dried powder should be kept in airtight containers away from humidity. Industrial users must adhere to HACCP and FDA/EU food safety regulations to prevent spoilage and cross-contamination.
B2B Procurement Guide
When sourcing Egg Albumen, prioritize suppliers with certifications like ISO 22000 or USDA Organic. Key specifications include protein content (≥80% for premium grades), solubility, and microbial limits. Bulk buyers should negotiate contracts based on seasonal price fluctuations in egg supply. For international shipments, consider tariffs and cold-chain logistics for liquid forms. Sample testing for functionality (e.g., whip volume) is recommended. Alternatives like plant-based proteins (pea, soy) may suit allergen-free requirements but lack identical performance in some applications.
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