GLYCERYL-LACTO ESTERS OF FATTY ACIDS

CAS: 977051-31-2 EMULSIFIER OR EMULSIFIER SALT

GLYCERYL-LACTO ESTERS OF FATTY ACIDS is a food additive used as an emulsifier and plasticizer in food formulations. In the United States it is permitted for direct addition to food under specific conditions defined in food additive regulations.

What It Is

GLYCERYL-LACTO ESTERS OF FATTY ACIDS is a class of food additive composed of the lactic acid esters of mono- and diglycerides. It falls within the broad category of emulsifiers, which are substances that help to blend or stabilize mixtures of oil and water that would otherwise separate. The term "glyceryl-lacto esters" reflects the chemical composition: glycerol molecules esterified with both lactic acid and fatty acids. Other recognized names for the same substance include various synonyms that describe its composition and structure. As an emulsifier, it performs a technical function in food products that require stable mixtures of fats and aqueous phases. This additive is identified in regulatory inventories by its CAS number, which is 977051-31-2, a unique registry identifier for chemical substances. In regulatory texts it is characterized by its functional class rather than a nutritional role. It does not contribute nutrients to food in the way that proteins, carbohydrates, or fats do, but instead acts at the interface of components to improve product consistency and quality. Its classification as an "emulsifier or emulsifier salt" defines its use in food technology rather than a direct sensory or nutritional role.

How It Is Made

The production of GLYCERYL-LACTO ESTERS OF FATTY ACIDS involves the esterification of glycerol with lactic acid and fatty acids. In basic terms, esterification is a chemical process where an alcohol (in this case glycerol) reacts with an acid (lactic acid and fatty acids) to form an ester bond with the release of water. The fatty acids used in the process may be derived from edible fats and oils or other specified sources. The glycerol component provides multiple hydroxyl groups that can esterify with acid molecules, forming the characteristic mono- and diglyceride structures bearing lactic acid moieties. After the reaction, the resulting product is typically purified to remove unreacted starting materials and byproducts. The manufacturing process is designed to meet food-grade specifications, ensuring that the final substance is suitable for use in food formulations. These specifications generally cover the identity and purity of the substance, including limits on residual reactants and contaminants. The additive as produced is usually a waxy solid with physical characteristics suitable for incorporation into food systems where emulsification is needed.

Why It Is Used In Food

GLYCERYL-LACTO ESTERS OF FATTY ACIDS is used in food primarily for its emulsifying properties. Emulsifiers facilitate the uniform dispersion of fats and oils within an aqueous phase, which is crucial in many food products such as baked goods, sauces, dressings, and confections. Without effective emulsification, products that contain both water-soluble and fat-soluble components can separate, leading to undesirable textures and inconsistent quality. In addition to emulsification, this substance may act as a plasticizer, aiding in the pliability and workability of doughs and batters. For example, in bakery products, an emulsifier can help to improve dough stability, promote gas retention during proofing, and enhance crumb structure in the finished bread. These functional effects are achieved without contributing caloric or nutritional value, but by improving the physical behavior of ingredients during processing and storage. Manufacturers choose GLYCERYL-LACTO ESTERS OF FATTY ACIDS when seeking consistent texture, extended shelf stability, and improved processing performance. The additive works in concert with other formulation components and processing conditions to deliver products that meet consumer expectations for texture and appearance.

Adi Example Calculation

To illustrate how an ADI concept is applied, consider a hypothetical example. If an additive had an ADI of 50 milligrams per kilogram of body weight per day (this example is illustrative only and not specific to this substance), a person weighing 70 kilograms would have a hypothetical acceptable daily intake of 3500 milligrams per day. This is calculated by multiplying the ADI by body weight. The outcome represents the total amount of additive that could theoretically be consumed daily over a lifetime without anticipated health risk. Regulatory exposure assessments compare typical intake from all food sources to such benchmarks to support safety conclusions. It is important to emphasize that this example does not represent an endorsement of a specific ADI for GLYCERYL-LACTO ESTERS OF FATTY ACIDS. It is solely included to explain how the ADI concept works in regulatory science. Actual regulatory evaluations for specific compounds can vary and are based on available toxicological data and exposure estimates.

Safety And Health Research

Regulators assess food additives like GLYCERYL-LACTO ESTERS OF FATTY ACIDS by reviewing data from toxicity studies, metabolism, and technical function. These assessments consider standard toxicology endpoints including acute toxicity, subchronic and chronic toxicity, reproductive and developmental effects, and genotoxicity. The goal of such evaluations is to determine whether typical exposure levels from consumption of foods containing the additive pose any risk to human health. In many cases, experts conclude that substances with long histories of use and low systemic absorption present minimal risk when used within established specifications. For related classes of emulsifiers that include lactic acid esters of mono- and diglycerides, expert bodies such as JECFA have conducted evaluations. These assessments sometimes result in the designation of an "ADI not limited" status for certain compounds, indicating that available data did not identify a hazard at realistic exposure levels. Nonetheless, each regulatory body applies its own criteria and updates evaluations as new data become available. Producers and regulators continue to monitor scientific literature and industry submissions for any new evidence that warrants reconsideration of existing safety assessments. Because GLYCERYL-LACTO ESTERS OF FATTY ACIDS is used at relatively low levels for technical effect rather than nutritional purposes, exposure from typical dietary intake is generally limited. Safety research and regulatory evaluations focus on ensuring that use patterns and manufacturing quality control practices prevent harmful contaminants and do not lead to exposure levels that would challenge established safety assessments.

Regulatory Status Worldwide

In the United States, GLYCERYL-LACTO ESTERS OF FATTY ACIDS is specifically listed in food additive regulations. Federal food regulation permits its use as an additive when it meets prescribed conditions and is used at levels not exceeding those reasonably required to achieve its intended physical or technical effect. This allowance is codified in Title 21 of the Code of Federal Regulations at section 172.852, which outlines how it must be manufactured and used. The regulatory language confirms that the additive may be safely used in food under these specified conditions. In international evaluations, additive classes similar to lactic and fatty acid esters have been reviewed by expert bodies such as the Joint FAO/WHO Expert Committee on Food Additives (JECFA). Historic evaluations of related substances have resulted in broad safety assessments. However, specific numeric values related to acceptable daily intake were established for closely related substances under certain provisos; these evaluations reflect a class-based approach to emulsifiers with shared structural features. Regulatory status in other regions such as the European Union involves safety assessment by the European Food Safety Authority or designated EU regulatory bodies. While an E number for this specific substance is not confirmed here, related emulsifiers with similar structures have been approved as food additives under EU regulations. Thus, while precise numbering may differ, the general class of lactic and fatty acid esters of glycerol is recognized within multiple regulatory frameworks around the world, subject to region-specific labeling and usage conditions.

Taste And Functional Properties

GLYCERYL-LACTO ESTERS OF FATTY ACIDS itself is not used for flavor; it does not have a significant taste profile at usage levels typical in food formulations. Instead, its sensory impact is indirect, influencing texture and mouthfeel by stabilizing emulsions and affecting the distribution of fats in a product. An effective emulsifier helps reduce the greasy or oily mouthfeel that can occur when fats are poorly dispersed, and can contribute to a smoother, more homogeneous texture. From a functional standpoint, this additive is stable under a range of processing conditions. It can maintain its emulsifying effect under thermal processing such as baking or pasteurization, and it remains effective across the pH range typical of many food products. The substance is dispersible in hot water and interacts with both hydrophilic and lipophilic components. These properties allow it to be used in diverse applications without degrading or losing activity prematurely. While it does not alter flavor directly, its impact on texture and stability can influence overall product quality. A well-emulsified product often delivers a more appealing sensory experience because the structure and distribution of ingredients are more controlled. This can make products more uniform in appearance and more pleasant during consumption.

Acceptable Daily Intake Explained

The concept of Acceptable Daily Intake (ADI) is used by regulatory scientists to describe a level of daily exposure to a food additive that is considered safe over a lifetime without appreciable health risk. ADIs are typically derived from toxicological studies in laboratory animals, identifying a level at which no adverse effects are observed. A safety factor is then applied to account for uncertainties in extrapolating data from animals to humans and to account for human variability. An ADI expressed in milligrams per kilogram of body weight per day serves as a benchmark for regulatory review and exposure assessment. For many emulsifiers and related compounds, evaluations have concluded that an ADI may not be specifically limited when evidence does not indicate harmful effects at typical intake levels. However, the absence of a defined numeric ADI in regulations does not imply that unlimited use is permissible. Rather, it reflects the weight of evidence indicating low hazard at anticipated exposure. Regulatory authorities still require that emulsifiers be used in amounts not greater than necessary to achieve their intended technical effect. This principle ensures that intake from all dietary sources remains within reasonable bounds and consistent with historical safe use.

Comparison With Similar Additives

GLYCERYL-LACTO ESTERS OF FATTY ACIDS belongs to a broader class of emulsifiers that includes other glycerol esters and lactylates. Common examples include sodium stearoyl lactylate and calcium stearoyl lactylate, which are also used to stabilize emulsions in baked products and other food systems. Compared to simple mono- and diglycerides, lactylates often provide improved dough conditioning and gas retention in bread products because the lactic acid component interacts with starch and gluten. This can enhance volume and texture in yeast-leavened products. Another related emulsifier category is polyglycerol esters of fatty acids, which can be used in similar applications such as bakery and confectionery products. Polyglycerol esters often provide high emulsifying strength and can be selected when a stronger effect is needed. In contrast, GLYCERYL-LACTO ESTERS OF FATTY ACIDS may be chosen when a more moderate emulsifying effect is suitable or when specific interactions with lactic acid are desired. Such comparisons help formulators select the additive that best matches the functional requirements of a particular product.

Common Food Applications Narrative

GLYCERYL-LACTO ESTERS OF FATTY ACIDS appears in a variety of processed food products where emulsification is necessary to achieve desired texture and stability. In baked goods such as bread, cakes, and pastries, emulsifiers help to ensure that fats are uniformly distributed throughout the dough or batter. This uniformity can improve gas retention during proofing, leading to better volume and crumb structure in the finished product. In cake mixes and breads, consumers often expect a fine, even texture, and the presence of an effective emulsifier supports that expectation. Beyond bakery, this emulsifier is used in sauces and dressings where oil and water phases coexist. Without an emulsifier, these products can separate over time, requiring vigorous shaking or stirring before use. By contrast, products formulated with GLYCERYL-LACTO ESTERS OF FATTY ACIDS remain stable over longer periods, delivering consistent texture and quality with minimal effort from the consumer. In confectionery and dairy analog products, emulsifiers contribute to smooth mouthfeel and prevent crystallization or phase separation. Ice creams and frozen desserts, for example, benefit from controlled fat dispersion to maintain creamy texture. Similarly, whipped toppings and fillings rely on emulsifiers to stabilize air cells and fat droplets. The presence of this ingredient in such products supports overall quality and consumer satisfaction. These varied applications illustrate the broad utility of emulsifiers in modern food manufacturing.

Safety & Regulations

FDA

  • Approved: True
  • Regulation: 21 CFR 172.852

EFSA

  • Notes: EFSA specific approval status and numeric ADI not verified from authoritative source

JECFA

  • Notes: JECFA assessment for this exact CAS not directly verified; related evaluations exist

Sources

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