MAGNESIUM OLEATE

CAS: 1555-53-9 ANTICAKING AGENT OR FREE-FLOW AGENT, EMULSIFIER OR EMULSIFIER SALT, LUBRICANT OR RELEASE AGENT

Magnesium oleate is a magnesium salt of oleic acid used in food processing for technological functions including anticaking, emulsification, and lubrication under specified regulatory conditions.

What It Is

What It Is Magnesium oleate is a chemical compound defined by the CAS Registry Number 1555-53-9 and recognized in regulatory inventories for specific uses in food processing under defined conditions. The compound is the magnesium salt of oleic acid, a long-chain unsaturated fatty acid. This salt form involves magnesium cations and oleate anions derived from oleic acid, providing unique functional properties when incorporated into food formulations. As an ingredient in food processing, it is identified by its technical functions, which include acting as an anticaking agent, emulsifier, lubricant, or a release agent depending on the application and formulation. It is also listed under indirect food additive regulations in the United States, where it appears in sections of the Code of Federal Regulations (CFR) associated with salts of fatty acids and components of coatings for food-contact surfaces. These regulatory listings form the legal basis for its permitted uses in specified food-related contexts. Magnesium oleate belongs to a broader class of compounds known as metallic salts of fatty acids, which are employed across various segments of the food industry for their ability to influence the physical behavior of ingredients and finished products. In chemical terms, the oleate anion arises from oleic acid, a monounsaturated omega-9 fatty acid common in many edible oils, while magnesium provides the cationic counterpart. This structural combination yields a substance that is generally solid at ambient temperatures and exhibits properties that help control the interaction of particles and phases in complex food systems. The presence of the MAGNESIUM OLEATE 9-OCTADECENOIC ACID (Z), MAGNESIUM SALT and MAGNESIUM 9-OCTADECENOATE, (Z)- OLEIC ACID, MAGNESIUM SALT synonyms reflects the ways the compound may be identified in scientific and regulatory documents. Understanding the identity of magnesium oleate begins with basic chemical nomenclature and regulatory classification. The common name used in ingredient reference contexts is MAGNESIUM OLEATE, aligning with the CAS registry entry and supporting clear identification for compliance and formulation purposes. Its classification as an anticaking agent, emulsifier, and lubricant underscores the diverse roles it plays in food processing, often bridging formulation needs with manufacturing and packaging considerations. This multiplicity of functions makes magnesium oleate a versatile additive where regulatory approval and technical justification intersect.

How It Is Made

How It Is Made Magnesium oleate is synthesized through a chemical reaction between oleic acid or oleate salts and magnesium sources such as magnesium oxide or magnesium hydroxide. In a typical industrial process, oleic acid derived from edible fats and oils is neutralized with a magnesium base to yield the corresponding magnesium salt, which precipitates out of the reaction mixture. The general reaction involves oleic acid combining with the magnesium compound under controlled temperature and agitation to form the magnesium oleate product. The reaction is adjusted to ensure that the desired stoichiometry and purity are achieved, with unreacted reagents and byproducts removed through washing and drying steps. This process yields a solid product that can be milled or otherwise processed into a consistent powder or granulate suitable for incorporation into food formulations under regulatory conditions. The manufacturing of magnesium oleate typically adheres to good manufacturing practices (GMP) and other quality standards relevant to food-grade additives. Raw materials used in production, such as the oleic acid feedstock, are often derived from food-compatible sources including vegetable oils or animal fats, depending on the supply chain and regulatory requirements. The choice of magnesium source and the specifics of reaction conditions are optimized to produce a product that meets defined specifications for composition, physical form, and functional behavior. After reaction and purification, the magnesium oleate product is dried and milled to a desired particle size distribution to support its performance as an anticaking agent, emulsifier, or lubricant in food processing. The production process may also include quality control steps such as assay testing, moisture content determination, and evaluation of physical properties to ensure consistency across batches. In practice, producers of food-grade magnesium oleate maintain documentation of processes and controls in alignment with regulatory expectations for indirect food additives and other permitted uses. While some chemical details may vary between manufacturers, the overarching methodology revolves around neutralization chemistry involving oleic acid and a magnesium source, followed by purification and formulation into a stable product form. This approach reflects standard practices used for producing metallic salts of fatty acids, which share common processing themes given their similar chemical backbone. The result is an ingredient that can be integrated into food processing applications where anticaking, emulsification, or lubricating functions are necessary to achieve product quality and manufacturing efficiency.

Why It Is Used In Food

Why It Is Used in Food Magnesium oleate is incorporated into food processing primarily for its functional roles that influence the physical behavior of food ingredients and finished products. As an anticaking agent, it helps prevent the aggregation and clumping of powdered and granulated materials, supporting free-flowing properties vital for manufacturing efficiency and consumer handling. In powdered products such as spice blends, dry mixes, or dehydrated ingredients, the presence of an anticaking agent can help maintain consistent texture and dosing performance by inhibiting moisture-induced agglomeration. The capacity of magnesium oleate to impart lubrication and reduce particle-particle friction contributes to these effects, particularly in environments where humidity and storage conditions could otherwise lead to undesirable caking. When used as an emulsifier or emulsifier salt, magnesium oleate facilitates the dispersion and stabilization of immiscible phases, such as oil and water, within food systems. In products that blend fat and aqueous components, achieving and maintaining a stable emulsion is essential for texture, appearance, and shelf stability. The amphiphilic nature of the oleate anion provides a bridging function between hydrophobic and hydrophilic domains, helping to maintain uniform distribution of fat droplets within an aqueous matrix. This behavior supports consistent mouthfeel and sensory characteristics in formulated foods, as well as enhancing product stability against phase separation during storage and distribution. Emulsification is particularly relevant in products such as sauces, dressings, confectionery fillings, and other composite foods where the integration of diverse ingredient classes must be managed. Magnesium oleate also serves as a lubricant or release agent, contributing to improved processing performance. In manufacturing operations, the reduction of surface friction and adhesion between food formulations and processing equipment can reduce wear, support smoother die release in extrusion and molding processes, and reduce the tendency of sticky components to adhere to machinery. This lubrication effect can assist in maintaining product integrity and operational throughput, particularly where complex ingredient matrices and heat-sensitive components are involved. These technological functionalities are fundamental to modern food production where ingredient interactions and process dynamics must be controlled to achieve consistent product quality and efficient, cost-effective manufacturing. Overall, the use of magnesium oleate in food contexts is tied to its ability to improve physical handling, textural properties, and processing performance within defined regulatory frameworks. Its multifunctionality aligns with the needs of formulators and processors who must balance ingredient behavior with regulatory acceptance and consumer expectations for quality and stability.

Adi Example Calculation

ADI Example Calculation The acceptable daily intake (ADI) framework is designed to provide a conservative reference point for evaluating the safety of food additives, but for magnesium salts of fatty acids such as those represented by magnesium oleate, regulatory assessments have concluded that a numerical ADI is not necessary. This conclusion arises from evaluations by expert bodies that consider the expected metabolic behavior of these compounds and their dietary context. Because magnesium oleate dissociates into its component parts—oleate and magnesium—during digestion, and because these components are normal constituents of many dietary fats and minerals, the additive class has been assessed as not requiring a specific numerical ADI at reported use levels. To illustrate how an ADI might be applied in cases where a numerical value is established, consider a hypothetical compound with a defined ADI of X mg per kilogram of body weight per day. An ADI calculation for an individual would involve multiplying the ADI value by the person’s body weight. For example, if a compound had an ADI of 10 mg/kg body weight per day and a person weighed 70 kg, their ADI would be 700 mg per day. This value represents a theoretical threshold below which daily intake over a lifetime is not expected to pose appreciable health risks, based on available toxicological data and uncertainty factors. However, in the case of magnesium oleate and related fatty acid salts where regulatory evaluations have not specified a numerical ADI, this type of calculation is not directly applicable. Instead, the focus lies on ensuring that use levels in food formulations adhere to good manufacturing practices, emphasizing the technological necessity of the additive and maintaining exposure consistent with normal dietary patterns. The absence of a defined numerical ADI reflects a regulatory determination that the components of magnesium oleate are handled by metabolic pathways familiar to the body and that their incremental contribution from additives does not warrant quantitative intake limits. It is important to recognize that ADI values, when established, provide a conservative safety margin and are not intended as recommended intake levels for consumers. They serve as benchmarks for regulators to assess whether the presence of an additive in the food supply is consistent with safety goals, considering lifetime exposure. In the absence of a numerical ADI for magnesium oleate, regulatory frameworks instead emphasize appropriate use conditions and adherence to good manufacturing practice to ensure safety and functionality in food processing contexts.

Safety And Health Research

Safety and Health Research Scientific and regulatory evaluations of magnesium oleate and related magnesium salts of fatty acids have focused on the broader class of metallic fatty acid salts rather than on isolated data specific to magnesium oleate itself. These evaluations consider how fatty acid salts behave in biological systems and the potential for adverse effects based on available toxicological evidence. In the context of regulatory assessments, magnesium salts of fatty acids such as E470b have been examined by expert bodies to determine whether their use in food processing poses safety concerns when employed within permitted conditions. These assessments typically encompass a review of dissociation behavior in the gastrointestinal tract, potential systemic exposure, and findings from studies of related compounds. The European Food Safety Authority (EFSA) conducted a re-evaluation of sodium, potassium, calcium, and magnesium salts of fatty acids as food additives, noting that these substances are expected to dissociate into fatty acid carboxylates and their corresponding cations during digestion. As a result of this expected behavior and an absence of concerning findings in available subchronic, chronic, and reproductive toxicity data, the EFSA Panel concluded that a numerical acceptable daily intake (ADI) was not necessary for these additives at reported use levels. This conclusion reflects an expert judgment that the metabolic fate and low potential for toxicity support their continued use under good manufacturing practice conditions. It is important to emphasize that evaluations of safety for fatty acid salts often integrate data across related substances rather than isolate magnesium oleate alone. The logic underpinning such evaluations involves understanding that the fatty acid components, such as oleic acid, are normal constituents of dietary fats, and that the magnesium ion is a common dietary mineral. Consequently, concerns focus on whether the combination alters expected metabolic pathways or introduces toxicological effects not accounted for through normal dietary exposure. The EFSA re-evaluation found no indications of safety concerns within the scope of reported uses and use levels for the class of substances, supporting a regulatory environment in which these additives can be employed without specific numerical intake limits. Toxicological literature specific to magnesium oleate itself is limited, and comprehensive studies that isolate the compound’s effects beyond its role in mixed fatty acid salts are not widely published in regulatory databases. As a result, the safety characterization often derives from broader evaluations of fatty acid salts and their behavior in food systems and biological contexts. Given this landscape, magnesium oleate’s safety profile is inferred from established knowledge of related compounds, regulatory assessments, and its expected metabolic fate when consumed as part of a food matrix. Overall, scientific and regulatory evaluations support the safe use of magnesium salts of fatty acids under defined conditions, with no evidence of significant health risks when employed according to good manufacturing practices. Ongoing research and monitoring continue to inform regulatory bodies and industry stakeholders, ensuring that safety assessments remain aligned with emerging data and usage patterns.

Regulatory Status Worldwide

Regulatory Status Worldwide In the United States, magnesium oleate appears in the Food and Drug Administration (FDA) inventory of substances associated with specific sections of the Code of Federal Regulations (CFR), indicating that it is recognized for certain food-related uses under defined conditions of good manufacturing practice. Specifically, its name appears in the context of 21 CFR 172.863, which covers salts of fatty acids permitted for direct addition to food for human consumption, and 21 CFR 175.300, which addresses indirect food additives used in adhesives and components of coatings for food contact surfaces. These regulatory citations provide the legal basis under U.S. law for the inclusion of magnesium oleate in applications that meet the criteria specified in those sections of the CFR. The presence of magnesium oleate in these inventories reflects the role of regulators in defining where and how certain additives can be used safely within food manufacturing and packaging contexts. The listings in 21 CFR 172.863 and 21 CFR 175.300 do not themselves specify quantitative limits for magnesium oleate in individual products; rather, they describe categories of permitted substances and the conditions under which they may be used. Compliance with these regulations requires that manufacturers adhere to good manufacturing practice, ensuring that the additive is used at levels necessary to achieve its intended effect and that finished products conform to applicable safety standards. The regulatory framework reflects the FDA’s approach to food additive oversight, where specific approvals are granted for defined uses and documentation must be maintained by manufacturers to demonstrate adherence to regulatory requirements. In the European Union, magnesium salts of fatty acids, often grouped under the designation E470b, have been evaluated by the European Food Safety Authority (EFSA) as part of a group of fatty acid salts used as food additives. In a scientific opinion on the re-evaluation of sodium, potassium, calcium, and magnesium salts of fatty acids, EFSA’s Panel on Food Additives and Nutrient Sources added to Food concluded that these substances did not require a numerical acceptable daily intake (ADI) due to their expected dissociation in the gastrointestinal tract and the lack of safety concerns at reported use levels. This assessment reflects the panel’s evaluation of the available scientific data and provides a basis for the continued use of magnesium salts of fatty acids under the EU’s food additive regulatory framework. Given these regulatory positions, the acceptance and permitted use of magnesium oleate in food-related applications depend on compliance with applicable national and regional requirements. Manufacturers and formulators must ensure that use levels and conditions meet the criteria established by regulatory authorities, and that documentation is maintained to support the safety and appropriateness of the additive’s inclusion in food products. Regulatory oversight continues to evolve as scientific evidence and manufacturing practices develop, requiring ongoing attention to compliance and safety standards in global food production.

Taste And Functional Properties

Taste and Functional Properties Magnesium oleate does not impart a significant taste profile when used at levels consistent with its technological functions in food processing. As a metallic salt of a fatty acid, the substance is present in small quantities relative to the bulk constituents of food products, and its sensory impact is generally masked by other ingredients in formulated foods. The oleate component is derived from oleic acid, a fatty acid that by itself is neutral in flavor and odor when incorporated into food systems. As a result, magnesium oleate can perform its intended technological roles without contributing off-notes or altering the expected sensory attributes of the product, provided it is used within the narrowly defined conditions of good manufacturing practice. From a functional perspective, magnesium oleate exhibits physicochemical properties that support its roles as an anticaking agent, emulsifier, and lubricant. The compound’s structure, featuring a long hydrophobic carbon chain paired with a charged magnesium center, enables it to interact with both water- and fat-containing phases in food systems. This dual affinity contributes to emulsification behavior, where the oleate moiety associates with lipid domains while the ionic portion interfaces with aqueous media, stabilizing mixtures that would otherwise separate. Its ability to modulate surface interactions also underpins its use as an anticaking agent, helping to reduce the cohesive forces between particles in powder blends and promoting flowability under a range of storage conditions. In addition to these functional aspects, magnesium oleate’s performance is influenced by its physical state and solubility profile. Typically a solid at ambient conditions, the substance can be milled to specific particle sizes to tailor its performance in dry blends. Its low water solubility and compatibility with oils contribute to its efficacy in hydrophobic environments, supporting lubrication and release behaviors during processing. While different fatty acid salts may exhibit varying degrees of solubility and surface activity, magnesium oleate’s characteristic profile aligns with applications where control over moisture interaction and phase dispersion is critical. This makes it suitable for use in multiphase foods where the integration of lipid and aqueous phases must be managed carefully to deliver the desired texture, appearance, and stability. Overall, the taste neutrality and functional properties of magnesium oleate reflect its utility in food processing contexts where texture, flow, and phase behavior are central to product quality. Its integration into formulations follows regulatory guidance and technical rationale aimed at balancing performance with sensory neutrality.

Acceptable Daily Intake Explained

Acceptable Daily Intake Explained The concept of acceptable daily intake (ADI) is central to regulatory evaluations of food additives, serving as an estimate of the amount of a substance that can be ingested daily over a lifetime without appreciable health risk. ADIs are typically established by expert bodies based on toxicological studies, including chronic and subchronic toxicity tests, reproductive and developmental studies, and other relevant data. They incorporate safety or uncertainty factors to account for variations in sensitivity across populations and gaps in data. The ADI is not a recommended intake level for consumers, but rather a regulatory benchmark used by authorities to assess whether the presence of an additive in food at permitted use levels is consistent with safety goals. In the case of magnesium salts of fatty acids such as those classified under the E470b designation, expert evaluations have concluded that a numerical ADI is not necessary. This conclusion reflects the understanding that these substances dissociate in the gastrointestinal tract into components that are either normal dietary constituents or are handled by typical metabolic pathways. For example, oleic acid is a common fatty acid found in many edible oils and fats, and magnesium is an essential mineral required for numerous physiological functions. When magnesium oleate is consumed within the context of food products at levels consistent with technological need, these components are expected to contribute only minor amounts relative to overall dietary exposure to oleic acid and magnesium. The absence of a numerical ADI for this class of additives indicates that regulators have not identified safety concerns at reported use levels and that the typical dietary contributions from these compounds do not pose appreciable risk. In regulatory assessments, the focus shifts from establishing a quantitative intake limit to ensuring that the additive is used in accordance with good manufacturing practices, meaning it is included at levels necessary to achieve its intended technological effect and that food products adhere to safety standards. This approach aligns with the principle that GRAS or permitted food additives should enhance food quality or processing without introducing undue risk when used responsibly. For consumers and formulators alike, the concept of an ADI provides a framework for understanding how regulators balance potential exposure with safety considerations. While numerical ADIs are common for many additives, the absence of a defined ADI for magnesium salts of fatty acids reflects a judgment that these substances, including magnesium oleate, behave in a manner that does not necessitate quantification of safe intake beyond normal dietary patterns. The ADI framework remains a useful tool for regulatory bodies to monitor and evaluate the safety of food additives but must be interpreted within the context of the specific compound and its metabolic behavior.

Comparison With Similar Additives

Comparison with Similar Additives Magnesium oleate belongs to a broader class of metallic fatty acid salts used in food processing, which includes sodium, potassium, and calcium salts of fatty acids. These compounds share structural similarities, with the fatty acid component providing a long hydrophobic chain and the associated metal cation influencing solubility, melting behavior, and functional properties. While magnesium oleate specifically involves the magnesium cation and oleic acid, other salts such as magnesium stearate involve stearic acid, and sodium oleate involves sodium paired with oleate. These variations in cation and fatty acid composition lead to differences in functional behavior in food systems. For example, magnesium stearate, a salt of stearic acid, is widely used as a lubricant and release agent in powdered formulations, similar to magnesium oleate. However, the stearate anion derives from a saturated fatty acid, whereas oleate comes from a monounsaturated fatty acid. This difference in saturation can influence the compound’s melting point, solubility, and surface activity, which in turn affects how it interacts with other components in a formulation. Both magnesium stearate and magnesium oleate can act as lubricants, but the specifics of their behavior will differ depending on the formulation matrix and processing conditions. Sodium and potassium salts of fatty acids, such as sodium oleate or potassium oleate, also exhibit emulsifying and surface-active properties due to their ionic nature and fatty acid backbone. These salts are often more soluble in aqueous phases due to the monovalent cation, which can make them particularly effective as surfactants in systems requiring rapid dispersion of phases. In contrast, magnesium salts tend to be less soluble in water and may be favored in applications where water insolubility and sustained surface behavior are desirable. The choice between these additives depends on the specific technological needs of the food product, including the desired balance between water and fat interactions. Within the category of E470 additives, differences in technological performance and regulatory recognition emerge as well. EFSA’s re-evaluation of E470a (sodium, potassium, and calcium salts of fatty acids) and E470b (magnesium salts of fatty acids) concluded that no numerical ADI was required for the group, reflecting a broad safety assessment based on expected metabolic fate and lack of concerning toxicological data. This shared regulatory outcome underscores the commonalities across these additives in terms of safety expectations when used appropriately. However, functional distinctions remain relevant for formulators, who select specific salts based on solubility, surface activity, and interaction with other ingredients. Overall, magnesium oleate and similar metallic fatty acid salts illustrate how variations in cation and fatty acid structure yield a spectrum of functional behaviors useful in food processing. Understanding these differences helps formulators tailor additive choices to specific product goals, whether targeting emulsification, lubrication, anticaking, or other technological objectives. Regulatory evaluations support the safe use of these additives under good manufacturing practices, while functional considerations guide their application in diverse food matrices.

Common Food Applications Narrative

Common Food Applications Magnesium oleate is encountered in a range of food processing scenarios where control over texture, flow, phase stability, and release behavior is necessary to achieve consistent, high-quality products. As an anticaking agent, it is incorporated into dry blends and powdered mixes to ensure that individual particles remain discrete and free-flowing, even under variable storage and humidity conditions. This functionality can be particularly important in products such as dry seasoning mixes, baking mixes, and dehydrated sauces, where particle aggregation may compromise ease of handling and dosing. In these applications, magnesium oleate supports uniformity and handling performance, helping manufacturers deliver products that meet consumer expectations for convenience and reliability. In emulsified products, the ability to support stable integration of lipid and aqueous phases makes magnesium oleate useful in applications such as dressings, sauces, and confectionery components. For example, in certain cream fillings or fat-containing dressings, incorporating an effective emulsifier contributes to a uniform appearance, smooth texture, and resistance to phase separation during storage. The emulsifying role of magnesium oleate aligns with broader formulation strategies in these products, where multiple ingredients must be combined in a way that preserves quality over shelf life. Its presence supports the formation of a stable particle interface that can withstand mechanical and thermal stress encountered during processing and distribution. In other food production processes, magnesium oleate’s lubricating and release properties help reduce adhesion between food materials and processing equipment. This can be valuable in extrusion, molding, or pressing operations where sticky or complex formulations may otherwise adhere to dies, molds, or other surfaces. By facilitating smoother release, magnesium oleate contributes to improved production efficiency, reduced waste, and enhanced consistency. Examples where this performance may be relevant include shaped confectionery products, extruded snack components, and other forms where physical manipulation and shaping are integral to product manufacture. Across these applications, magnesium oleate is typically used at levels that achieve functional objectives without altering the sensory profile of the food. Its integration into formulations is grounded in established formulation principles, where each additive serves a specific role in supporting texture, stability, or processing performance. Manufacturers consider the presence of magnesium oleate in the context of the overall ingredient matrix, balancing its effects with those of other components to deliver products that meet regulatory standards and customer expectations for quality, appearance, and consistency. This multi-faceted utility underscores the role of magnesium oleate in modern food production, where complex ingredient interactions must be managed carefully to achieve desired product outcomes.

Safety & Regulations

FDA

  • Approved: True
  • Regulation: 21 CFR 172.863 and 21 CFR 175.300

EFSA

  • Notes: EFSA concluded no numerical ADI was necessary for magnesium salts of fatty acids and assessed no safety concern at reported use levels based on re-evaluation.
  • Approved: True
  • E Number: E470b

JECFA

  • Notes: JECFA evaluation for magnesium salts of fatty acids did not establish a numeric ADI; therefore no INS or year is specified.

Sources

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