ALGINATE, AMMONIUM
ALGINATE, AMMONIUM (CAS 9005-34-9) is the ammonium salt of alginic acid used in food and industrial applications as a stabilizer, thickener, and emulsifier derived from brown seaweed polysaccharides.
What It Is
ALGINATE, AMMONIUM is a naturally derived polysaccharide salt identified by CAS number 9005-34-9 and classified as an ammonium salt of alginic acid. It belongs to the class of food hydrocolloids and is recognized for its multifunctional roles in food systems, including emulsification, stabilization, thickening, and texturizing. The compound is listed under international food additive codes including E 403 in the European additive numbering system and is broadly described in regulatory inventories under various functions such as emulsifier, thickener, and surface-active agent. Alginic acid is a high‑molecular‑weight polymer extracted from the cell walls of brown algae. In ALGINATE, AMMONIUM, the acid groups of alginic acid are neutralized with ammonium ions to form a salt that retains the functional hydrocolloid properties common to alginates. This ammonium form provides similar hydration and gel‑forming characteristics to other alginate salts but with variations in solubility and rheological behavior depending on pH and ionic strength of the food system. Alginates, including the ammonium salt form, are common ingredients in modern food formulation because they can modify texture without contributing significant flavor or caloric load. Based on regulatory listings and monographs, ALGINATE, AMMONIUM is accepted in food regulations such as the US Code of Federal Regulations, reflecting its history of safe use in foods where it serves technological purposes without inherent nutritive benefit.
How It Is Made
ALGINATE, AMMONIUM is produced by extracting alginic acid from natural brown seaweed biomass, followed by purification and neutralization with an ammonium base under controlled pH conditions. The raw material alginic acid is first isolated from harvested seaweed through alkaline extraction and acid precipitation steps that remove non‑alginate components such as proteins, pigments, and insoluble fibers. The purified acid is then adjusted with an ammonium hydroxide or similar neutralizing agent to yield the ammonium salt form. The resulting product is typically dried and milled into a fine powder that can be handled easily in industrial food or technical applications. Purity specifications such as those developed by the Food Chemicals Codex are often referenced in regulatory sections like the US CFR and provide criteria for moisture content, insoluble residue, and ash values. As a hydrophilic polymer, the ammonium alginate must be manufactured to meet food‑grade standards that limit contaminants and ensure consistent functional performance in aqueous systems. Due to its polymeric nature, ALGINATE, AMMONIUM does not have a single defined molecular weight; instead, quality control focuses on viscosity profiles and functional behavior in solution. Its manufacture emphasizes controlled raw material sourcing from brown algae species and standardized processing to yield a reproducible hydrocolloid product suitable for use in a wide range of formulated foods and industrial applications.
Why It Is Used In Food
In food formulation, ALGINATE, AMMONIUM is valued for its capacity to deliver consistent texture, stable emulsions, and controlled viscosity. As a hydrocolloid, it interacts with water to form viscous solutions or gels depending on concentration and formulation context. These properties make it suitable for use in products where texture, mouthfeel, and suspension stability are crucial, such as in sauces, dressings, dairy desserts, and confectionery. Its effectiveness in controlling phase separation and improving stability is central to its technological justification. The multifunctionality of ALGINATE, AMMONIUM arises from its polysaccharide backbone, which can associate with other biopolymers to enhance network formation or with fats to stabilize dispersed phases. Emulsifying and surface‑active properties enable it to help maintain fine dispersions of oil in water, and vice versa, which is beneficial in complex food matrices. Additionally, its gel‑forming behavior under specific ionic environments can be used to create structured foods with desirable bite and structural integrity. The use of alginate salts also supports formulation efforts where clean labeling is desirable, as they are often perceived as natural hydrocolloids derived from seaweed sources. Because it does not contribute flavor of its own, ALGINATE, AMMONIUM can be incorporated without altering the sensory profile of foods, and its hydration and thickening effects are harnessed in a broad range of industrial and artisanal food products.
Adi Example Calculation
To illustrate the concept of acceptable daily intake (ADI) when a regulatory body assigns an ‘‘ADI not specified,’’ consider a hypothetical food additive with such a designation. If an adult weighing 70 kg consumes a product containing the additive at typical levels found in food, the total daily intake might be a fraction of what could influence physiological function. Because no specific numeric ADI was set for ALGINATE, AMMONIUM by regulators like JECFA or EFSA due to low toxicological concern, this illustration underscores that typical food exposure levels for such hydrocolloids are considered safe without requiring detailed intake limits. This type of example emphasizes that ‘‘ADI not specified’’ means regulators have determined through risk assessments that the additive presents negligible risk at current usage patterns, and therefore a numerical intake constraint is not assigned. It is different from designated numeric ADIs where explicit mg/kg values are provided.
Safety And Health Research
Scientific reviews and regulatory evaluations of alginic acid and its salts, including the ammonium form, have consistently indicated low toxicological concern at levels relevant to food use. These evaluations commonly note that alginates are not significantly absorbed intact from the gastrointestinal tract and are largely excreted, a factor that reduces the potential for systemic toxicity. Regulatory panels have reviewed genotoxicity and carcinogenicity data for alginic acid and selected salts, concluding absence of significant concern under conditions of intended use. (联邦公报) Because alginates are high‑molecular‑weight polysaccharides, they are processed by intestinal microflora to a limited extent, and fermentation end products such as short‑chain fatty acids are typically of no regulatory concern. Toxicological data have not identified adverse effects at doses that would be encountered in food applications. However, as with many hydrocolloids, very high intake can have laxative effects in sensitive individuals, but such effects are considered minor relative to regulatory safety thresholds. The historical absence of a specified ADI by JECFA reflects this broad assessment of low hazard with typical dietary exposure. (INCHEM) Regulators also consider potential allergenicity or hypersensitivity, though evidence does not suggest widespread adverse reactions attributable directly to alginate salts. The absence of significant systemic absorption limits concerns about direct physiological effects, and ongoing monitoring continues as part of routine food additive safety oversight.
Regulatory Status Worldwide
In the United States, ALGINATE, AMMONIUM is recognized in the Code of Federal Regulations, part 184.1133, where it is listed with specifications for food use. This listing reflects longstanding acceptance in food regulations and references purity criteria in compendial standards. It also appears in inventories linking it to other parts of CFR Sections 173 and 178 where indirect food additive uses are described, indicating authorized functions under specific conditions such as use as formulation or processing aids. Its inclusion in the CFR suggests it is considered safe for its intended uses when compliant with specified purity requirements. In the European Union, alginic acid and its salts (including the ammonium salt identified as E 403) are authorized food additives under EU food additive regulations with specified functional classes such as thickeners, gelling agents, and stabilizers. The European Food Safety Authority evaluated alginic acid and its salts and concluded that a numerical acceptable daily intake (ADI) was not necessary due to the low toxicity and limited systemic absorption of these polysaccharides at typical levels of exposure. (联邦公报) The Joint FAO/WHO Expert Committee on Food Additives has evaluated alginic acid and its salts in various meetings, and historical evaluations indicate that no specific numerical ADI was allocated, reflecting a long history of safe use based on limited absorption and low toxicity. (INCHEM) Regulatory acceptance worldwide is reflected in additive numbering systems such as INS 403, where it is recognized in Codex and other international listings as an authorized food additive with specified technological functions.
Taste And Functional Properties
ALGINATE, AMMONIUM is typically odorless and tasteless, making it suitable for incorporation into food systems without impacting the intended flavor profile. Its functional behavior is dominated by its interaction with water and other components rather than direct sensory contributions. In aqueous systems, it hydrates to form highly viscous solutions that provide body and mouthfeel in low concentrations, and under specific conditions it can form weak gels when interacting with divalent cations. The performance of ALGINATE, AMMONIUM in foods depends on pH, temperature, and the presence of other solutes. It is generally stable across a range of food processing conditions, though extreme pH or high heat may influence its viscosity. In beverages or thin liquids, it assists in suspension stability, helping to keep particulates evenly dispersed. In thicker products like sauces, it enhances texture and reduces syneresis. Because it does not provide sweetness, saltiness, or acidity, its use must be balanced with ingredients that deliver the desired flavor. As a hydrocolloid, its rheological properties can be tailored by adjusting concentration and formulation. At low concentrations it behaves as a thickener; at higher levels it contributes to gelation and structure. These properties have made it a ubiquitous choice in processed foods where texture modification and stability are primary objectives.
Acceptable Daily Intake Explained
In food additive regulation, the concept of an acceptable daily intake (ADI) is used to quantify the amount of an additive that can be consumed daily over a lifetime without appreciable risk. For ALGINATE, AMMONIUM and related alginate salts, authoritative evaluations by bodies such as JECFA and EFSA have concluded that a numerical ADI is not necessary, indicating that these substances are of low toxicological concern at current levels of use. This determination is based on data showing minimal absorption and lack of systemic toxicity in standard toxicological studies. (联邦公报) An ADI ‘‘not specified’’ does not mean there is no safety evaluation; rather, it implies that the available data support the conclusion that exposure at typical use levels does not pose a health risk requiring a specified numeric intake limit. This conclusion reflects both the nature of the compound—a large polysaccharide with limited digestive absorption—and the breadth of evidence from toxicity and exposure assessments. Understanding this regulatory language helps consumers recognize that the absence of a numeric ADI for certain hydrocolloids is grounded in safety evaluations rather than a lack of review.
Comparison With Similar Additives
ALGINATE, AMMONIUM can be compared with other alginate salt additives such as sodium alginate (E 401), potassium alginate (E 402), and calcium alginate (E 404), which share a common alginic acid backbone but differ in cation counterions. These differences can influence solubility, gelation behavior, and interactions with other food components. For example, calcium alginate can form stronger gels in the presence of divalent cations compared to the ammonium or sodium forms, which are often used when gel strength needs to be moderated. In comparison to other hydrocolloids like carrageenan or guar gum, alginates generally provide unique properties related to ion‑mediated gelation and viscosity control. Carrageenan forms thermoreversible gels under specific conditions, while alginates form ionically cross‑linked structures that impart stability in different pH and ionic environments. Guar gum, a galactomannan, is primarily a thickener without strong gelation in the absence of cross‑linking ions. Such comparisons help formulators choose the appropriate hydrocolloid based on desired textural and stability outcomes in food products.
Common Food Applications Narrative
ALGINATE, AMMONIUM finds application in a wide array of food products where texture and stability are key quality attributes. In dairy‑based desserts and processed cheese products, it helps to maintain smoothness and prevent phase separation during storage. In sauces, gravies, and dressings, its ability to provide uniform viscosity improves pourability and mouthfeel, while also aiding in emulsion stability between aqueous and lipid phases. Confectionery products that require controlled gel structure, such as fruit gels or certain candies, also benefit from alginate hydrocolloids in achieving the desired bite and chewiness. Beverage systems that include suspended particulates, such as fruit pieces or nutraceutical ingredients, use alginate salts to maintain homogeneity and prevent settling during shelf life. Bakery fillings and frostings leverage the texturizing properties to ensure consistent spreadability and to reduce migration of moisture that can compromise product quality. The neutral sensory profile of ALGINATE, AMMONIUM means it can be used without altering the intended taste of the product, allowing formulators to focus on the desired flavor while delivering functional benefits. Across these applications, its use is guided by the need to modify texture, control viscosity, and stabilize emulsions in a manner consistent with consumer expectations for quality and consistency.
Safety & Regulations
FDA
- Approved: True
- Regulation: 21 CFR 184.1133
EFSA
- Notes: EFSA concluded no numerical ADI necessary based on available evaluations
- Approved: True
- E Number: E403
JECFA
- Notes: JECFA evaluations have historical records with ADI not specified
- Ins Number: 403
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