GLYCERYL LACTOPALMITATE

CAS: 1338-09-6 EMULSIFIER OR EMULSIFIER SALT, FORMULATION AID

GLYCERYL LACTOPALMITATE is a food-grade emulsifier used to improve texture and stability in a variety of processed foods. It is permitted as part of the lactic and fatty acid esters of glycerol under US food additive regulations.

What It Is

GLYCERYL LACTOPALMITATE is a food additive commonly used as an emulsifier and formulation aid in processed foods. It is chemically classified as a lactic acid ester of glycerol and palmitic acid and is part of the broader class of lactic and fatty acid esters of glycerol permitted for use in food. The additive has a defined CAS number 1338-09-6 and appears in regulatory listings for food substances in the United States under provisions that authorize certain emulsifier ingredients. Its structural role in foods is to help disperse oil- and water-based components evenly, contributing to improved texture and consistency in finished products. This type of ingredient is part of the technical toolbox used by manufacturers to achieve specific functional outcomes in product formulations, particularly where fat dispersion, moisture balance, and texture stability are important. GLYCERYL LACTOPALMITATE is not a single molecule encountered naturally in foods at appreciable levels but rather is formed deliberately through esterification processes that combine glycerol, lactic acid, and fatty acid constituents. In regulatory inventories, it is recognized under various synonyms reflecting its chemical composition, including glycerol lactate mono- and dipalmitate and lactopalmitin. The presence of multiple synonyms for the same CAS number reflects how chemical nomenclature can vary across databases and regulatory references. Regardless of the naming variation, the core functional identity of the compound remains that of an emulsifier contributing to mixture uniformity in complex food systems. As an emulsifier, it interacts with both hydrophilic and lipophilic phases in mixtures, reducing interfacial tension and promoting stable dispersion of components that otherwise would separate. In the context of food science, emulsifiers like GLYCERYL LACTOPALMITATE play a central role in products where a smooth, integrated texture is necessary, such as in dressings, spreads, and aerated desserts. The term "formulation aid" which applies to this ingredient, highlights its supportive role in achieving desired product characteristics rather than imparting sensory impact on its own. While the compound itself is not a predominant source of flavor or nutritional value, its contribution to texture and processing behavior is significant in food manufacturing. In regulatory terms, approval listings and inventoried uses provide a framework within which manufacturers can add such emulsifiers in amounts appropriate to accomplish their intended technical effect without exceeding necessary use levels.

How It Is Made

The production of GLYCERYL LACTOPALMITATE involves chemical reactions that esterify glycerol with lactic acid and palmitic acid moieties. In general, manufacturing processes for lactic and fatty acid esters of glycerol start with food-grade glycerol, which is reacted with lactic acid to form intermediate lactylated glycerol species. These intermediates are then combined with palmitic acid or palmitic acid-containing triglycerides under controlled conditions to form mono- and diesters that include GLYCERYL LACTOPALMITATE. The resulting product typically undergoes purification steps designed to remove unreacted reactants, byproducts, and residual catalysts. Industrial reaction conditions emphasize control of temperature, catalyst choice, and reactant ratios to maximize yield while meeting food-grade quality specifications. In broad terms, the creation of such emulsifiers employs strategies used across the food additive sector for ester formation: careful blending of reactants, heat application to drive esterification, and downstream processing to meet purity criteria. Food-grade raw materials are selected according to regulatory specifications and industry quality standards, including conformity with applicable sections of the Code of Federal Regulations and recognized compendia. Regulatory listings for lactic and fatty acid esters of glycerol set context for these manufacturing practices, emphasizing that the materials used in synthesis must themselves meet criteria for food use. While the specific catalytic systems and process conditions may vary between manufacturers, the overall route from basic glycerol and fatty acid precursors to a finished emulsifier aligns with standard organochemical methods for producing food emulsifiers. Quality control and specification compliance are critical parts of manufacturing. Finished batches of GLYCERYL LACTOPALMITATE are typically analyzed for acid value, glyceride profile, and residual free glycerol and fatty acids to ensure that the material aligns with expected chemical properties and performance characteristics. Analytical methods such as gas chromatography and infrared spectroscopy are often applied to characterize the ester composition and confirm the identity and purity of the product. Food-grade emulsifiers are produced with an emphasis on reproducibility, stability, and compliance with regulatory thresholds that pertain to direct food additives. This ensures that raw materials used in food manufacturing behave consistently when incorporated into products and that they meet the technical objectives for which they are intended.

Why It Is Used In Food

GLYCERYL LACTOPALMITATE is used in food primarily as an emulsifier, which assists in blending ingredients that do not naturally mix, such as water and fats. Emulsifiers are essential in many processed foods because they prevent separation, improve texture, and stabilize formulations during storage and consumption. GLYCERYL LACTOPALMITATE falls into the class of lactic and fatty acid esters of glycerol, a group of compounds widely used in the food industry for their ability to integrate disparate phases within complex food matrices. Food scientists choose such emulsifiers when they want to achieve consistent product quality across batches and ensure stable structure over shelf life. The reason this additive is selected for food applications is linked to its functional chemistry, which bridges hydrophilic and lipophilic environments. In practical terms, this means that when added to a formulation, GLYCERYL LACTOPALMITATE molecules orient themselves at interfaces between water-rich and oil-rich phases, reducing the energy required to maintain an even distribution of components. This quality is particularly valuable in products like dressings, sauces, fillings, and aerated desserts where a uniform appearance and mouthfeel are desirable. Emulsifiers like GLYCERYL LACTOPALMITATE also help control moisture migration, texture firmness, and the integration of air into certain formulations. Another reason for using GLYCERYL LACTOPALMITATE relates to processing efficiency. In industrial settings, achieving stable emulsions early in the processing sequence can streamline operations, minimize waste, and reduce the need for excessive mechanical shear. These technical functional benefits make emulsifiers a staple of modern food formulation. Although the substance itself does not contribute flavor or nutritive value at typical use levels, its impact on how ingredients interact at a molecular level directly influences product quality and consumer experience. As formulation aid, its role complements other functional ingredients such as stabilizers, thickeners, and gelling agents, contributing to the texture and performance characteristics expected in processed foods.

Adi Example Calculation

To illustrate how acceptable daily intake (ADI) concepts are applied, consider a hypothetical scenario for a food additive with a defined ADI. Suppose an additive has an ADI of 10 mg per kilogram of body weight per day. For an individual weighing 70 kilograms, this illustrative ADI would correspond to a maximum of 700 mg of the additive per day if consumed repeatedly over time at that level. This calculation is simply the product of the numeric ADI and the body weight, and it serves to show how exposure comparisons are made relative to safety benchmarks. In the case of GLYCERYL LACTOPALMITATE and related lactic and fatty acid esters of glycerol, expert evaluations have established an ADI described as "not limited," indicating that available data do not identify a specific numeric threshold of concern at typical exposure levels. Under these circumstances, the focus shifts to ensuring that use levels in food formulations are kept at the minimum necessary to achieve functional effects, since ADIs do not apply in the usual numeric sense. Nevertheless, illustrative calculations, like the one above, help clarify how ADIs are interpreted in terms of exposure relative to body weight, which is a key element of regulatory risk assessment. It remains important for manufacturers to document use levels and for risk assessors to monitor intake across populations to ensure that exposures remain consistent with safety expectations.

Safety And Health Research

Regulatory and scientific evaluations of food additives, including emulsifiers like GLYCERYL LACTOPALMITATE, focus on assessing potential hazards in the context of anticipated dietary exposure. Scientific studies of related lactic and fatty acid esters of glycerol have examined metabolism and toxicological endpoints in laboratory settings to determine how these compounds are processed by the body. Metabolic research indicates that glycerol esters of lactic acid and fatty acids are hydrolyzed in the gastrointestinal tract into constituent molecules such as glycerol, lactic acid, and fatty acids, which are normal dietary components and metabolic intermediates. Such findings provide context for safety assessments by demonstrating that the ester bonds are cleaved and that the resulting products are metabolized similarly to free lactic acid and fatty acids, which are common in food and physiological processes. These metabolic outcomes are part of the evidence considered by expert committees when evaluating additive safety. Toxicological studies conducted historically on lactic and fatty acid esters of glycerol have included acute and subchronic tests in laboratory animals, which generally showed no significant adverse effects at doses substantially higher than expected human exposure levels when these esters are used as intended in foods. Based on evaluations conducted by expert panels, including the Joint FAO/WHO Expert Committee on Food Additives, the class of lactic and fatty acid esters of glycerol was assigned an "ADI not limited" designation, reflecting a conclusion that the available data did not identify health hazards at typical use levels for this group of compounds. This ADI designation, with the qualifying insight that it applies to the sum of glycerol esters of fatty acids and certain acid esters including lactic acid, supports the view that normal metabolic processing and low dietary exposure from food use pose minimal risk. Although historical evaluations inform regulatory acceptance, modern safety science continues to emphasize the need for rigorous data on genotoxicity, reproductive and developmental endpoints, and long-term exposure effects when assessing additives. The available evidence for lactic and fatty acid esters of glycerol suggests low hazard potential, which supports their continued inclusion in authorized food additive categories. Nevertheless, regulatory agencies periodically review emerging data and may update guidance or specifications as new research becomes available. In this context, adherence to use levels that achieve technical effects without unnecessary excess remains a prudent practice for manufacturers using GLYCERYL LACTOPALMITATE and similar emulsifiers.

Regulatory Status Worldwide

In the United States, GLYCERYL LACTOPALMITATE appears in the FDA Substances Added to Food inventory, formerly known as EAFUS, which lists substances permitted for use in food under specified conditions, with reference to relevant sections of the Code of Federal Regulations. The US listing indicates that this ingredient is used as an emulsifier or formulation aid and is associated with regulatory provision 21 CFR 172.852, which authorizes the use of lactic and fatty acid esters of glycerol as food additives when used in accordance with prescribed conditions. The CFR provision specifies that such emulsifiers may be safely used in food and that they are typically manufactured from glycerin, lactic acid, and fatty acids conforming to specified standards, and used at levels not exceeding those reasonably required to achieve the intended technical effect. These regulatory listings establish that GLYCERYL LACTOPALMITATE is permitted for direct addition to foods within the United States under the appropriate regulatory framework as part of the broader class of lactic and fatty acid esters of glycerol. Additionally, the FDA’s GRAS framework describes how certain substances may be considered generally recognized as safe under conditions of intended use, though the specific GRAS status of this compound is not asserted here without direct citation. Outside the United States, regulatory frameworks vary. In some jurisdictions, additives are assigned International Numbering System (INS) identifiers which harmonize with Codex Alimentarius references. The broader class of lactic and fatty acid esters of glycerol corresponds to INS number 472b, which reflects a recognized category of emulsifiers in international food additive inventories. Such INS assignments help regulators and food producers identify and classify additives consistently across markets, although specific use conditions and maximum levels can differ by region. Harmonized international databases maintained by organizations such as the Joint FAO/WHO Expert Committee on Food Additives provide specifications and evaluation histories for categories of emulsifiers, including the lactic and fatty acid esters of glycerol. These resources support global regulatory coherence and scientific assessment of additive safety and specifications. Regulatory listings generally emphasize functional use conditions and specifications rather than specific sensory or nutritional claims. In many regions, food additive approvals are contingent upon demonstrated utility as a technical processing aid and compliance with purity criteria. While GLYCERYL LACTOPALMITATE itself may not have an explicit maximum permitted level defined in all jurisdictions, its inclusion within a regulatory category of authorized emulsifiers signifies acceptance of its use when applied appropriately to achieve specific functional outcomes in food products.

Taste And Functional Properties

GLYCERYL LACTOPALMITATE is not typically added to foods for flavor but for functional properties that influence texture, stability, and processing behavior. As an emulsifier, it is largely neutral in taste, meaning that at the levels used to achieve technical effect, it does not impart distinct sensory notes to finished products. Instead, food scientists rely on its ability to facilitate uniform dispersion of fat and water phases and to maintain structural consistency under varying conditions of temperature and mechanical stress. Its relatively neutral organoleptic profile makes it compatible with a wide range of formulations without interfering with the intended sensory attributes of the food. In terms of physical behavior, GLYCERYL LACTOPALMITATE interacts with other ingredients at interfaces. In emulsified systems, the additive helps establish and maintain fine droplets of oil dispersed in water (or vice versa), contributing to smooth appearance and consistent texture. Emulsifiers of this class generally aid in the formation of more stable emulsions that resist coalescence and separation over typical product shelf lives. This functional behavior is valuable in dressings, low-fat formulations, whipped products, and other applications where phase separation would be undesirable. The stability provided by emulsifiers can also influence mouthfeel, contributing to a perception of creaminess or uniformity that aligns with consumer expectations for certain product categories. The functional performance of GLYCERYL LACTOPALMITATE also extends to its behavior under heat and shear. In many food processing operations, ingredients are subjected to mixing, pumping, heating, and cooling sequences that can challenge emulsion stability. Emulsifiers help systems withstand these stresses by reducing interfacial tension and forming protective layers around dispersed droplets. Although individual performance can vary based on the specific formulation and processing conditions, the general role of this additive in enhancing product stability and texture is well recognized in food formulation practice. Because it does not contribute significant flavor or color, its impact is evaluated primarily through its technical performance in maintaining consistent product quality.

Acceptable Daily Intake Explained

An Acceptable Daily Intake (ADI) is a scientific estimate of the amount of a food additive that can be ingested daily over a lifetime without appreciable health risk. ADIs are typically expressed in milligrams of the additive per kilogram of body weight per day. They are derived from toxicological data, including studies in experimental animals, and incorporate safety factors that account for uncertainties in extrapolating from animal models to humans and variability among individuals. Regulatory and expert panels evaluate available data to establish an ADI for specific additives or classes of additives. For the class of lactic and fatty acid esters of glycerol, including GLYCERYL LACTOPALMITATE, an expert evaluation by the Joint FAO/WHO Expert Committee on Food Additives concluded that the ADI is "not limited," which reflects a determination that there was no evidence of adverse effects at doses substantially above expected dietary exposure. An "ADI not limited" designation means that, based on available studies, the compound’s metabolism and lack of observed toxicity at relevant exposure levels support the conclusion that safety concerns do not arise within normal use conditions. However, it is important to understand that an ADI is not a recommended intake level; rather, it is a conservative threshold indicating that exposure below this level is not expected to pose health concerns. The concept of ADI is used by regulators and risk assessors to guide risk management decisions and inform regulatory limits or use conditions. It helps ensure that food additive uses are consistent with safety standards over long-term consumption. When an ADI is expressed as "not limited," regulatory decision-makers interpret this as evidence that typical uses of the additive do not result in significant health risk, provided that use levels are consistent with achieving intended technical effects and complying with regulatory frameworks. Manufacturers and food safety authorities continue to monitor scientific evidence and regulatory guidance to ensure that additive uses remain aligned with current safety assessments.

Comparison With Similar Additives

GLYCERYL LACTOPALMITATE shares functional similarities with other emulsifiers commonly used in food processing. Emulsifiers such as mono- and diglycerides, lecithins, and polyglycerol esters of fatty acids all serve to stabilize mixtures of oil and water phases. Mono- and diglycerides, for example, are glycerol esters of fatty acids that help stabilize bakery products, shortenings, and dairy analogs by reducing surface tension between phases, thereby contributing to consistent texture. Lecithins, derived from sources such as soy or egg yolk, are phospholipid-based emulsifiers widely used in chocolates and confections for controlling viscosity and improving processing behavior. Polyglycerol esters of fatty acids represent a broader class of emulsifiers formed by esterifying polyglycerols with fatty acids; they are often used in dressings, bakery fillings, and aerated products where robust emulsification is needed. Compared with mono- and diglycerides, GLYCERYL LACTOPALMITATE and other lactic acid esters of glycerol have additional lactic acid moieties in their structure, which can influence their hydrophilic-lipophilic balance. This structural variation may affect how the emulsifier interacts with other ingredients and how it performs under different processing conditions. Lecithins, by contrast, bring phospholipid functionality that can be particularly effective in specific systems such as chocolate and margarine, where they complement or replace glyceride-based emulsifiers. Polyglycerol esters of fatty acids, with their range of polyglycerol chain lengths, provide a spectrum of functional properties that can be tailored to specific needs, such as high shear stability or resistance to temperature fluctuations. While each emulsifier class has unique attributes, the choice among them depends on the type of food product, processing conditions, and desired quality characteristics. GLYCERYL LACTOPALMITATE is selected for systems where its particular balance of hydrophilic and lipophilic properties supports stable emulsification and textural outcomes. In many applications, formulators use combinations of emulsifiers to leverage complementary functionalities, balancing texture, processing behavior, and stability over shelf life. These comparisons highlight how different emulsifiers contribute to food formulation goals, with the choice of additive tailored to both technical requirements and regulatory acceptance in relevant markets.

Common Food Applications Narrative

In everyday food production, GLYCERYL LACTOPALMITATE is part of the toolkit that food scientists use to deliver consistent, stable products that meet consumer expectations for texture and appearance. While consumers rarely think about emulsifiers by name, the role such ingredients play is evident in a wide range of processed foods. For example, in salad dressings, an emulsifier like GLYCERYL LACTOPALMITATE helps fat and vinegar phases stay blended, preventing the rapid separation that would otherwise require vigorous shaking before use. In aerated desserts and toppings, emulsifiers contribute to the incorporation and stabilization of air bubbles, supporting a light, uniform structure that enhances mouthfeel. In dairy analogs and reduced-fat products, maintaining a creamy texture without the richness of full fat can be challenging. Emulsifiers help redistribute residual fat and interact with proteins and hydrocolloids to yield a smooth, palatable product. Similarly, in bakery fillings and icings, emulsifiers contribute to a consistent spreadability and prevent phase separation over time. These functional contributions extend to sauces and dressings where texture uniformity and stability are key quality attributes. In confectionery and chocolate applications, certain emulsifiers aid in controlling viscosity during processing, which can affect molding, enrobing, and overall product handling. Although consumers may not identify GLYCERYL LACTOPALMITATE by name, its influence is present in many processed foods that rely on stable emulsions and uniform texture. The additive is selected for applications where technical performance—such as emulsification, aeration support, or moisture control—is necessary to achieve desired product characteristics. Its use alongside other formulation components such as thickeners, stabilizers, and flavors allows manufacturers to tailor texture and processing behavior to specific product goals. In each case, the functional contributions of GLYCERYL LACTOPALMITATE help ensure that finished products meet quality expectations consistently across production lots.

Safety & Regulations

FDA

  • Approved: True
  • Regulation: 21 CFR 172.852

EFSA

  • Notes: EFSA specific evaluation for this compound not found in available sources

JECFA

  • Year: 1973
  • Notes: JECFA assigns ADI not limited for the class of lactic and fatty acid esters of glycerol
  • Ins Number: 472b
  • Adi Display: ADI not limited

Sources

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