POLYOXYETHYLENE (600) MONORICINOLEATE

CAS: 977137-78-2 SURFACE-ACTIVE AGENT

Polyoxyethylene (600) monoricinoleate is a surface-active agent used in food processing, listed in the US FDA "Substances Added to Food" inventory with specific Code of Federal Regulations references 21 CFR 173.340 and 176.200.

What It Is

Polyoxyethylene (600) monoricinoleate is a synthetic compound used in food applications as a surface-active agent. It is identified by CAS number 977137-78-2 and is listed in the US FDA "Substances Added to Food" inventory with regulatory references 21 CFR 173.340 and 176.200, which cover its permitted use in food processing and food-contact materials for specific technological functions including defoaming and surface activity in processing environments. This compound is also known by other names including PEG-12 ricinoleate, PEG-12 monoricinoleate, polyethylene glycol 600 monoricinoleate, and polyoxyethylene 600 monoricinoleate. As a surface-active agent, it belongs to the class of nonionic surfactants that can reduce surface tension between phases and facilitate processes like emulsification and defoaming in industrial food systems. In the context of food technology, surface-active agents are important additives that enable effective processing by modifying interfacial properties of food systems. These functions can include stabilizing emulsions, aiding in mixing immiscible liquids, controlling foam, and improving the interaction of ingredients during manufacturing. Although the term "surface-active agent" covers a broad class of chemicals, polyoxyethylene (600) monoricinoleate specifically refers to a nonionic ester formed between polyethylene glycol (with an average molecular weight of 600) and ricinoleic acid moieties, a fatty acid derivative.

How It Is Made

Polyoxyethylene (600) monoricinoleate is synthesized through chemical processes where polyethylene glycol (typically PEG 600) is esterified with ricinoleic acid or ricinoleate derivatives in controlled conditions that encourage ester bond formation. While specific industrial-scale methods are proprietary, the general approach for producing such nonionic surfactants involves reacting a controlled molar ratio of ethylene oxide units with a fatty acid or fatty acid derivative under catalyzed conditions to form the desired ester. These reactions are conducted with control over temperature, catalysts, and purification steps to achieve a consistent average molecular weight and acceptable purity profile for food or industrial use. Purification steps after synthesis often involve removal of unreacted monomers, catalysts, and by-products to ensure the resulting surfactant meets quality specifications appropriate for use in food processing environments. Such specifications include limits on residual reactants and compliance with regulatory standards for intended applications. Quality control for these materials includes analytical checks on molecular weight distribution, free fatty acid content, and other chemical characteristics that define functional performance in food systems. Industrial production of polyoxyethylene-based nonionic surfactants usually adheres to good manufacturing practices that emphasize reproducibility and safety. Because the compound is utilized in food-contact contexts, manufacturers need to ensure that the final product is consistent with regulatory expectations and free of contaminants that could impact food quality or safety.

Why It Is Used In Food

Polyoxyethylene (600) monoricinoleate is used in food processing primarily for its surface-active properties. Surface-active agents are valued in food manufacture because they can facilitate interactions between phases that would otherwise separate, such as oil and water. They can improve the efficiency of mixing, enhance texture where emulsions are used, and reduce undesirable foaming or interfacial tension during processing operations. For example, in processes that involve high agitation or heating, control of foam can be critical to maintaining equipment efficiency and product consistency. In food processing contexts, defoaming is often necessary when air or gas is introduced during mixing or heating steps, and uncontrolled foam can lead to reduced efficiency in heat transfer, uneven cooking, or packaging challenges. A surface-active agent that assists in preventing or reducing foam formation can therefore improve process reliability and product uniformity. This is reflected in its listing under the relevant sections of the Code of Federal Regulations that govern secondary direct food additives and permissible substances used in food-contact applications in the United States. The use of surface-active agents such as polyoxyethylene (600) monoricinoleate must align with regulatory permissions. In the US, where it is listed, its inclusion in food process aids or contact materials is expected to be under specified conditions of use that assure it performs its technological function without compromising safety. Such compounds are chosen for specific tasks in processing rather than as ingredients that contribute nutritional value or typical sensory qualities to food.

Adi Example Calculation

An illustrative example of how an acceptable daily intake (ADI) might be used, without implying a specific numeric ADI for polyoxyethylene (600) monoricinoleate, is as follows: Suppose an international expert committee established an ADI of X milligrams per kilogram of body weight per day for a hypothetical compound. For a person weighing 70 kilograms, multiplying the ADI by body weight would give an upper bound of X times 70 milligrams per day as the amount that could theoretically be ingested daily over a lifetime without appreciable risk. This calculation is illustrative and would apply only if an ADI were specifically established for the compound in question. In the absence of a verified numeric ADI for polyoxyethylene (600) monoricinoleate, the example serves to explain the concept without implying a specific safety threshold.

Safety And Health Research

Safety assessments for food additives and processing aids generally focus on potential toxicological effects, including acute and chronic toxicity, genotoxicity, reproductive and developmental endpoints, and other hazard indicators. The inclusion of polyoxyethylene (600) monoricinoleate in the FDA’s inventory with specific regulatory references suggests that its use patterns and associated exposures in food processing or contact contexts have been considered within that regulatory system. However, explicit toxicological data such as acceptable daily intake values or comprehensive health effect evaluations may not be publicly detailed in the regulatory listings themselves. Regulators review a variety of data sources, including animal studies, chemical characterization, and exposure assessments, to determine whether a compound is safe under its intended conditions of use. For surface-active agents used in processing environments, the exposure to consumers is often indirect and at low levels, particularly when the compound functions as a processing aid or in food-contact materials rather than as a direct ingredient. Safety assessments consider this exposure context, along with available hazard data, to establish that the compound can be used without posing unreasonable risk. Publicly accessible sources such as national additive inventories and chemical databases provide identification and functional information but may not always include detailed toxicological evaluations or safety thresholds. To understand the body of research on health effects for a given compound, one would typically review regulatory evaluations, scientific literature, and toxicological monographs from authoritative bodies. In the absence of specific numeric safety benchmarks such as an acceptable daily intake established by international expert committees like JECFA for this compound, cautionary narrative acknowledges the role of regulatory review rather than providing definitive health outcome claims.

Regulatory Status Worldwide

Polyoxyethylene (600) monoricinoleate is listed in the US FDA "Substances Added to Food" inventory with regulatory references to 21 CFR 173.340, which covers defoaming agents permitted in food processing, and 21 CFR 176.200, which pertains to substances used in paper and paperboard components intended for food contact. These citations indicate that the compound is recognized for specific surface-active and defoaming roles within the regulatory framework that governs food additives and indirect food-contact substances in the United States. The listing reflects that its use in those contexts has been reviewed and defined under those sections of the Code of Federal Regulations, which set conditions for safe use based on intended function and exposure. The inclusion of regulatory codes in the inventory helps manufacturers and regulators identify where and how such compounds can be used in the US. It also signals that appropriate safety assessments, labeling expectations, and use limitations are associated with the compound’s application in food processing or contact materials. While the compound is recognized under US regulations, equivalent explicit listings or usage permissions in other regions such as the European Union, Codex Alimentarius, or other national regulatory systems would require separate confirmation from those jurisdictions’ additive lists or contact material directives. Because regulatory frameworks differ internationally, food businesses operating in multiple markets must verify that additives and processing aids are permitted for their intended uses in each jurisdiction. In some cases, compounds permitted in one market may require additional evaluation or may not be explicitly listed in others. Verification through official additive lists or food-contact material regulations is a necessary step in international food production.

Taste And Functional Properties

Polyoxyethylene (600) monoricinoleate itself does not significantly contribute taste or aroma to food products when used in processing because it functions at low levels primarily to modify surface properties rather than as a flavor or taste component. Its functional properties relate to its behavior in food systems as a nonionic surface-active agent, meaning it can align at the interface between liquids of different polarities, such as water and oil phases, and help stabilize or destabilize those interfaces depending on processing needs. These characteristics make it effective at tasks like emulsification, foam control, and wetting. In terms of solubility, compounds like polyoxyethylene (600) monoricinoleate often have amphiphilic structures, meaning they contain both hydrophilic (water-attracting) polyoxyethylene segments and hydrophobic (water-repelling) fatty acid segments. This amphiphilic nature allows them to position themselves at boundaries between aqueous and nonaqueous phases, which is the essence of surface activity. The balance of these segments also influences how well the compound interacts with various food matrices and processing environments. While solubility in pure water may be limited, its behavior in mixed systems or in the presence of other food components can lead to effective distribution where its surface activity is needed. Thermal stability and pH tolerance are additional functional considerations for surface-active agents. Because food processing often involves elevated temperatures and a range of pH environments, additives like polyoxyethylene (600) monoricinoleate must maintain their functional integrity without degrading under typical processing conditions. Performance under these variables is part of why specific surfactants are selected for industrial use.

Acceptable Daily Intake Explained

An acceptable daily intake (ADI) is a concept used by toxicologists and regulatory scientists to describe an estimate of the amount of a substance that can be ingested daily over a lifetime without appreciable health risk, based on available data and safety factors. It is not a recommended intake for consumers but a risk-based threshold that helps regulators set limits and conditions for the use of additives or residues in food. For some food additives, expert committees such as the Joint FAO/WHO Expert Committee on Food Additives (JECFA) establish ADIs when sufficient toxicological and exposure data are available. In the case of polyoxyethylene (600) monoricinoleate, authoritative sources do not appear to provide a specific numeric ADI. This means that rather than quoting a numeric safety benchmark, the narrative here explains the role of an ADI in food safety evaluation more generally. Where an ADI is established for an additive by organizations such as JECFA or by regional regulators, it is derived from dose-response data in animal studies, with conservative safety factors applied to account for uncertainties in extrapolating to human exposures. The resulting ADI provides a context for regulators and industry to evaluate whether typical exposure levels from food uses are within safe bounds.

Comparison With Similar Additives

Surface-active agents and defoamers used in food processing span a range of chemical structures and functional properties. For instance, dimethylpolysiloxane is another defoaming agent permitted under 21 CFR 173.340 that acts through a different chemical mechanism, relying on silicone-based structures to reduce surface tension and control foam. In contrast, polyoxyethylene (600) monoricinoleate is a nonionic surfactant with a balance of hydrophilic and hydrophobic segments that favor interactions at liquid interfaces. Another example is polysorbate 60, a polyoxyethylene ester of sorbitan monostearate, which also serves as a surface-active agent or emulsifier in certain contexts. While all of these compounds are used to modify surface phenomena, their chemical classes differ, and so do their physical properties, compatibilities, and regulatory contexts. Comparing such additives highlights how functional roles like emulsification or defoaming can be achieved by structurally distinct molecules with tailored properties for specific processing needs.

Common Food Applications Narrative

In the world of food manufacturing, surface-active agents like polyoxyethylene (600) monoricinoleate serve roles that support the physical and mechanical aspects of food production. These agents are part of a broader class of ingredients used behind the scenes to enable consistent processing, efficient handling, and uniformity in products that would otherwise be difficult to produce at scale. The applications of such compounds can include use in defoaming steps where mechanical agitation could otherwise introduce excessive foam, in emulsification systems where oil and water phases must be blended and maintained in suspension, and in other technical roles that facilitate consistent production. For example, in processes involving high-shear mixing or heating, controlling foam build-up can be essential to maintaining equipment function and product quality. Defoamers help ensure that unwanted bubbles and foam do not disrupt mixing, filling, or heat transfer. Similarly, in systems where emulsions are central—such as certain dressings, sauces, or fat-containing products that require stable dispersion of one phase within another—surface-active agents help create and sustain those dispersions. While polyoxyethylene (600) monoricinoleate may not be directly listed as an ingredient on consumer packaging, its use in processing can indirectly contribute to the technical success of those products. Food manufacturers and ingredient suppliers choose surface-active agents based on the specific requirements of their production lines, including regulatory acceptability, compatibility with other ingredients, and functional reliability. These compounds are evaluated for their performance in target applications and selected to match the physical needs of a process rather than to influence flavor or nutritional content.

Safety & Regulations

FDA

  • Approved: True
  • Regulation: 21 CFR 173.340 and 21 CFR 176.200

EFSA

  • Notes: No specific EFSA listing identified

JECFA

  • Notes: No specific JECFA evaluation with numeric ADI found

Sources

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