POTASSIUM GLYCEROPHOSPHATE
Potassium glycerophosphate is an inorganic salt form of glycerophosphate containing potassium ions, primarily used as a food nutrient fortifier and electrolyte source in some formulations.
What It Is
Potassium glycerophosphate is a chemical compound identified by the CAS number 1319-70-6 that consists of potassium cations and glycerophosphate anions in a hydrated form. It is recognized in some regulatory inventories and chemical databases as a food ingredient or nutrient fortifier with technical effects in food formulations. The compound is listed in the U.S. Food and Drug Administration’s Substances Added to Food inventory, indicating it has been noted for potential use in food systems, though this listing alone does not constitute a specific regulatory approval or limitation for direct food additive use in the United States. This compound is water soluble and is often provided in a trihydrate crystalline form. Potassium glycerophosphate appears in scientific and commercial chemical catalogs under various names, reflecting its structure as a dipotassium salt of glycerophosphoric acid with three molecules of water of hydration, consistent with the input other names provided.
How It Is Made
Potassium glycerophosphate is typically synthesized through chemical reactions involving glycerol and phosphoric acid derivatives under controlled conditions. One common approach is to combine a source of dihydrogen phosphate with potassium ions in aqueous solution followed by controlled crystallization of the trihydrate form. In industrial or laboratory settings, the reaction pathway often begins with glycerol reacting with phosphoric acid derivatives to form glycerophosphate intermediates, which then form salts with potassium hydroxide or potassium phosphate, and are subsequently isolated by evaporation and crystallization. Manufacturers that produce potassium glycerophosphate as a food ingredient or intermediate adhere to standard chemical processing and purification practices to achieve the desired purity and hydration state. Because compound quality and specifications can affect functional behavior in food systems, producers provide detailed technical information about moisture content, purity, and water solubility in product data sheets.
Why It Is Used In Food
In food formulation contexts, potassium glycerophosphate is valued for its role as a nutrient fortifier and source of electrolytes in product formulations. The presence of both potassium and phosphate moieties means that when dissolved in aqueous food systems, it can contribute to the mineral content of beverages, supplements, sports nutrition products, and other foods where a controlled delivery of potassium and phosphate is desired. Its technical functions can include buffering capacity and mineral supplementation without contributing strong flavors or significant changes to texture when used at appropriate levels. Potassium glycerophosphate’s solubility in water facilitates its incorporation into liquid or rehydrated food applications where maintaining clarity or stability is important. Formulators often select such compounds to fulfill nutritional claims or to balance ionic strength in specialized food products.
Adi Example Calculation
Because there is no established numeric acceptable daily intake (ADI) value for potassium glycerophosphate from authoritative regulators in the sources consulted, a specific illustrative calculation using an ADI cannot be reliably provided. In general, if a numeric ADI were established, an example calculation would take the ADI expressed in mg per kilogram of body weight and multiply it by a representative body weight to estimate a theoretical daily intake limit for an individual. In the absence of such a regulatory numeric value, this section remains descriptive rather than numeric, emphasizing that product formulators consider typical dietary mineral reference values and avoid excessive fortification levels that could contribute to mineral intakes beyond recommended nutritional guidelines.
Safety And Health Research
Scientific evaluation of food ingredients typically encompasses assessments of acute toxicity, chronic exposure, genotoxicity, and potential effects on organ systems. For potassium glycerophosphate, the available safety information indicates that the compound has been noted in regulatory inventories such as the U.S. FDA Substances Added to Food database, which lists it for recognized use in food systems rather than indicating specific hazards. Safety data sheets for potassium glycerophosphate generally describe standard chemical handling precautions for laboratory or industrial use, including avoiding inhalation of dust and contact with skin or eyes. There is limited published toxicological literature focused exclusively on this compound, and authoritative regulators have not widely published detailed hazard evaluations or specific ADI values, underscoring the importance of context-specific safety assessments in food applications rather than broad claims about physiological effects. In food formulation practice, adherence to good manufacturing practices and adherence to compositional limits recommended by relevant food safety authorities help keep consumer exposure within accepted safety margins.
Regulatory Status Worldwide
Potassium glycerophosphate is listed in the U.S. Food and Drug Administration’s Substances Added to Food inventory, which includes substances that have been noted for use in food systems and may be subject to GRAS or other safety designations, but inclusion in this inventory does not by itself establish a specific food additive regulation or approved use condition in the Code of Federal Regulations. The FDA inventory entry confirms the compound’s presence in the database without providing a definitive CFR section for explicit additive authorization; as such, fda.approved is null with notes reflecting the absence of a clearly defined CFR regulation from available authoritative sources. For other regions such as the European Union and JECFA/FAO-WHO, comprehensive searchable databases are available, but explicit additive authorization, E-number assignment, or established acceptable daily intake (ADI) values for potassium glycerophosphate could not be confirmed from the available records at the time of this writing. Global regulatory positions vary, and formulators often rely on local inventories, GRAS notifications, and food safety reviews to determine appropriate use conditions in specific jurisdictions.
Taste And Functional Properties
Potassium glycerophosphate in aqueous solution generally does not have a pronounced flavor at typical use levels; its contribution to taste is minor compared with primary flavor components such as sweeteners or acids. Functional properties are based on its solubility and ionic interactions: the compound dissolves readily in water, dissociating into potassium and glycerophosphate ions, which can contribute to electrolyte balance and buffering capacity in food systems. Its stability in neutral to slightly acidic environments makes it compatible with many beverage and nutritional formulations that must maintain consistent pH during storage. In thermal processing, the compound remains chemically stable under typical pasteurization conditions, although extreme pH or prolonged high heat may cause decomposition. Due to its ion content, it can also influence the conductivity and mouthfeel of fortified beverages, particularly those marketed as electrolyte replacements or functional sports drinks.
Acceptable Daily Intake Explained
An acceptable daily intake (ADI) is a regulatory benchmark used by food safety authorities to estimate the maximum amount of a substance that can be consumed daily over a lifetime without appreciable health risk. ADI values are typically based on toxicological data from animal studies and incorporate safety factors to account for uncertainty. In the case of potassium glycerophosphate, there is no widely published numerical ADI value established by major authorities such as JECFA or EFSA in the records examined here, and therefore efsa.adi_mg_per_kg and jecfa.adi_mg_per_kg remain null in the regulatory_safety section with notes explaining the absence of explicit numeric evaluations. Without a recognized ADI, safety assessments focus on ensuring that total intake from fortified foods and supplements remains within typical dietary mineral intake ranges established for potassium and phosphate by nutrition guidelines, rather than relying on an ADI.
Comparison With Similar Additives
Potassium glycerophosphate can be compared with other mineral salts and electrolyte sources used in foods and beverages. For example, potassium chloride is a common source of potassium in fortified foods, providing a simple potassium salt with a salty taste profile that may require masking in certain products. Magnesium sulfate may be used to provide magnesium ions but can have a distinct mineral taste. Sodium phosphate salts such as trisodium phosphate serve as buffering agents and mineral sources but contribute sodium instead of potassium. Compared with these alternatives, potassium glycerophosphate provides both potassium and a phosphate moiety, making it suitable when formulators seek a combined mineral source in electrolyte beverages or fortified formulations. Functional considerations such as solubility, taste impact, and electrolyte balance inform additive choice in specific product categories, with each compound offering different technical properties based on its ionic composition.
Common Food Applications Narrative
Potassium glycerophosphate finds applications in a range of fortified food and beverage products where enhanced mineral content or electrolyte balance is part of the formulation strategy. For example, sports and hydration beverages often combine sources of potassium and other electrolytes to support mineral replenishment during or after physical activity, and potassium glycerophosphate may be used alongside sodium or magnesium salts to achieve the desired mineral profile. In nutritional supplement powders or ready-to-drink fortified waters, it serves as a potassium and phosphate source that integrates into clear solutions without impacting clarity or stability. Additionally, specialized nutritional drinks targeted at individuals requiring electrolyte support or enhanced mineral content may use this compound as part of a broader formulation that addresses specific nutrient profile goals. Because potassium is an essential mineral in human diets, its inclusion in these product categories supports labeling claims related to electrolyte content and contributes to the broader array of functional beverages and nutritional foods available to consumers.
Safety & Regulations
FDA
- Notes: No specific CFR additive listing found in authoritative FDA regulations supporting explicit approved uses.
EFSA
- Notes: No explicit EFSA additive authorization or ADI numeric values identified in available authoritative sources.
JECFA
- Notes: JECFA evaluation entry exists in the searchable database, but no documented ADI or year numeric value was confirmed.
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