MAGNESIUM MYRISTATE
Magnesium myristate is the magnesium salt of myristic acid and is used in food and other industries for its anticaking, emulsifying, and lubricant functional properties.
What It Is
Magnesium myristate is a chemical compound consisting of magnesium and the fatty acid myristic acid, identified by the CAS number 4086-70-8. It belongs to a class of magnesium salts of fatty acids that function as anticaking agents or free-flow agents, emulsifiers or emulsifier salts, and lubricants or release agents in food formulations. These technical functions mean that magnesium myristate helps prevent clumping in powdered products, aids blending of different phases in formulations, and can reduce friction between particles or between material and equipment surfaces. The compound’s other known names in industrial or regulatory contexts include various synonyms referencing its chemical structure as a magnesium salt of tetradecanoic acid. In regulatory nomenclature, it falls under the broad group of "salts of fatty acids" permitted in specific food additive categories under U.S. regulations.
How It Is Made
Magnesium myristate is typically prepared by reacting myristic acid with a magnesium source such as magnesium hydroxide or magnesium oxide under controlled conditions. The myristic acid used for this purpose is derived from edible fats and oils or from purified fatty acid fractions. In this process, the magnesium compound neutralizes the fatty acid to form the magnesium salt, which is then isolated, purified, and processed into a powder suitable for industrial use. High purity grades are generally required for food-grade applications, and the final product must comply with relevant food additive purity specifications established by regulators. Because this compound is a salt of a long-chain fatty acid, the manufacturing and purification steps focus on ensuring consistent particle size and minimizing contamination by other fatty acid salts or reaction byproducts.
Why It Is Used In Food
Magnesium myristate is used in food formulations because of its multifunctional technological properties. As an anticaking agent or free-flow agent, it helps powdered ingredients remain free-flowing by reducing the tendency of particles to clump together under conditions of humidity or processing. As an emulsifier or emulsifier salt, it can aid in forming stable mixtures of oil and water phases that would otherwise separate, improving uniformity in products that combine ingredients with differing polarities. As a lubricant or release agent, it can facilitate the movement of material through processing equipment and improve the texture or handling of compressed or formed foods. These functions are particularly valuable when manufacturing dry blends, spice mixes, seasoning powders, powdered drink mixes, and other products where consistency, flow, and texture are critical performance attributes.
Adi Example Calculation
Given that no numerical ADI has been assigned for magnesium myristate, quantitative examples of daily intake calculations are not applicable in the context of regulatory safety assessments.
Safety And Health Research
Safety research on magnesium myristate often focuses on the broader class of fatty acid salts, which are metabolized into common dietary constituents. Although detailed toxicological studies on magnesium myristate itself are limited, expert panels have evaluated similar compounds and concluded that they are safe when used as intended in food processing. Dissociation in the gastrointestinal tract produces fatty acid carboxylates and magnesium ions that are part of normal metabolic pathways, which supports regulatory decisions that do not require numerical ADI values.
Regulatory Status Worldwide
In the United States, magnesium myristate and related magnesium salts of fatty acids are allowed as food additives under 21 CFR 172.863, which specifies conditions of use as binders, emulsifiers, and anticaking agents. In the European Union, magnesium salts of fatty acids are recognized under E470b with defined purity criteria and permissions under EU food additive regulations. JECFA has evaluated magnesium salts of fatty acids and designated the group as having no allocated ADI, indicating it is expected to be safe within its technological uses. Regulatory frameworks in other countries generally align with these assessments, permitting magnesium salts of fatty acids based on their functional utility and expected metabolic fate.
Taste And Functional Properties
Magnesium myristate in its typical powdered form is a white to off-white fine powder that is essentially tasteless at the low concentrations used in food applications. The sensory impact is minimal because it is used at very low levels to achieve its technological functions rather than as a flavoring agent. Functionally, it behaves as a hydrophobic salt of a long-chain fatty acid, meaning it does not readily dissolve in water but interacts with both aqueous and lipid phases to influence texture and flow. Its anticaking properties help absorb or shield moisture at particle surfaces, reducing interparticle adhesion. As an emulsifying agent, it can assist in maintaining uniform dispersion of lipid droplets in aqueous matrices under processing conditions. Its stability over typical food processing pH and thermal ranges makes it a useful additive in a variety of food systems.
Acceptable Daily Intake Explained
Regulators use the ADI concept to define safety thresholds based on toxicological evidence. For magnesium myristate, an ADI is not specified because its metabolic products are considered normal components of the diet and safety concerns are not identified at typical use levels.
Comparison With Similar Additives
Magnesium myristate is often used interchangeably with other fatty acid salts such as magnesium stearate and calcium stearate. These additives share functionalities like anticaking and lubrication, but differ slightly in physicochemical properties. Silicon dioxide offers a different mechanism for preventing clumping without fatty acid chemistry, while mono- and diglycerides provide emulsifying properties more suited to complex oil-water systems.
Common Food Applications Narrative
Magnesium myristate is incorporated into a wide range of powdered and dry food products where maintaining flow and texture is important. In dry beverage mixes such as instant drink powders, it helps prevent clumping and ensures a smooth pour even under humid storage conditions. In seasoning blends and spice mixes, magnesium myristate aids in distributing ingredients evenly and protecting against moisture-induced agglomeration. It can also be used in baking mixes where its lubricant properties assist in handling and processing of the dough or batter. In formulations that require stable blending of oil and water phases, the emulsifying properties contribute to uniform texture and quality. Across these applications, the additive’s role is purely technological, improving manufacturing performance and finished product attributes without adding flavor or nutritional value.
Safety & Regulations
FDA
- Notes: Allowed as salts of fatty acids used as binders emulsifiers and anticaking agents in food under good manufacturing practice but specific approval for magnesium myristate by name is not singled out.
- Regulation: 21 CFR 172.863
EFSA
- Notes: EFSA assessed magnesium salts of fatty acids as E470b and indicated no numerical ADI was needed in its re-evaluation.
- Approved: True
- E Number: E470b
JECFA
- Notes: JECFA evaluated magnesium salts of fatty acids and did not allocate a numerical ADI.
- Ins Number: 470
- Adi Display: No ADI Allocated
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