ETHYLENE OXIDE/PROPYLENE OXIDE COPOLYMER, ALKYL ADDUCT, PHOSPHATE ESTER

CAS: 977083-03-6 WASHING OR SURFACE REMOVAL AGENT

ETHYLENE OXIDE/PROPYLENE OXIDE COPOLYMER, ALKYL ADDUCT, PHOSPHATE ESTER is a technical surfactant used as a washing or surface removal agent in food processing, permitted for use under specific regulatory conditions.

What It Is

ETHYLENE OXIDE/PROPYLENE OXIDE COPOLYMER, ALKYL ADDUCT, PHOSPHATE ESTER is a synthetic copolymer made by combining ethylene oxide and propylene oxide units and further chemically reacting them with long alkyl chains and phosphate groups to form a phosphate ester. It belongs to the class of nonionic surfactants and is used in food processing for its ability to reduce surface tension, helping with washing operations and surface removal tasks. This type of compound falls within the broader category of alkylene oxide adducts modified with phosphate, designed to interface with both hydrophilic and hydrophobic phases. Its CAS Registry Number is 977083-03-6, which uniquely identifies this specific chemical structure under regulatory inventories. ETHYLENE OXIDE/PROPYLENE OXIDE COPOLYMER, ALKYL ADDUCT, PHOSPHATE ESTER has multiple synonyms arising from variations in nomenclature, reflecting both its polymeric composition and functional phosphate ester group. These synonyms may be encountered in regulatory databases or technical dossiers where the compound is listed for industry or compliance use. In regulatory listings such as the United States Food and Drug Administration’s "Substances Added to Food" inventory (formerly EAFUS), this ingredient is categorized for specific food contact uses. The compound serves primarily as a processing aid rather than an intentional flavoring or nutritional contributor. Its inclusion in regulatory lists clarifies that it is recognized for its utility in aiding processes such as washing or assisting in the removal of surface residues on food commodities, rather than being added for taste or nutrition. Many polymeric surfactants made from ethylene oxide and propylene oxide share similar names and properties, but the phosphate ester modification in this specific ingredient distinguishes it within regulatory contexts and intended processing applications.

How It Is Made

The manufacture of ETHYLENE OXIDE/PROPYLENE OXIDE COPOLYMER, ALKYL ADDUCT, PHOSPHATE ESTER involves polymerization of ethylene oxide and propylene oxide monomers in a controlled sequence, typically catalyzed by a base or acid catalyst under elevated temperature and pressure. The copolymer backbone arises from alternating or block addition of the epoxide monomers to achieve desired hydrophilic and hydrophobic balance, often tailored for specific surfactant performance. After the initial copolymer formation, long-chain alkyl alcohols are reacted with the polymer to form alkyl adducts, introducing hydrophobic moieties that improve surface activity and compatibility with lipid-rich residues. Finally, the hydroxyl-terminated copolymer is esterified with phosphoric acid or a related phosphating agent to introduce phosphate ester groups, further enhancing the molecule’s affinity for interfaces between aqueous and organic phases. Phosphate esters are widely used in surfactants because they offer a balance of water solubility and interaction with nonpolar substances, which is critical in washing and surface removal applications. The resulting compound is typically formulated and purified to meet specifications for its intended industrial application. While the detailed process conditions and catalysts can vary among manufacturers, the general pathway combines controlled polymerization with functionalization steps to yield a surfactant with phosphate ester functionality. Industrial synthesis of such copolymers follows standard practices for ethoxylation and propoxylation chemistries and is typically conducted in specialized facilities with appropriate safety and environmental controls. Because the compound is a polymeric material with variable chain lengths, manufacturers often characterize the product by average molecular weight ranges and performance specifications rather than a single well-defined molecular formula. The process from monomer to finished surfactant involves purification steps to remove residual catalysts and unreacted monomers, ensuring the final product meets purity criteria appropriate for its allowed regulatory use.

Why It Is Used In Food

ETHYLENE OXIDE/PROPYLENE OXIDE COPOLYMER, ALKYL ADDUCT, PHOSPHATE ESTER is used in food processing environments as a surface-active agent to aid in washing operations or the removal of surface residues from fruits and vegetables. Its primary technological function derives from its ability to lower surface tension at interfaces, making it easier to dislodge soil, waxes, and other contaminants from produce or food contact surfaces. Food processors may select this class of copolymer surfactants when conventional washing agents do not adequately address stubborn residues, helping achieve consistent cleaning performance and reduce manual interventions. Because the compound’s chemistry combines hydrophilic segments from ethylene oxide with hydrophobic alkyl groups and phosphate functionality, it interacts effectively with a range of substances that can adhere to food surfaces. This balance of properties allows it to encapsulate nonpolar residues while remaining dispersible in aqueous washing solutions. Although the ingredient does not impart flavor, color, or nutritional value, it plays a supportive role in upstream food production steps essential for ensuring produce quality and compliance with hygiene standards. Its use is typically confined to defined conditions, such as permitted concentrations in wash solutions according to food additive regulations, rather than inclusion in finished packaged foods destined for consumers. By aiding processing, it helps food manufacturers meet quality specifications, reduce waste from surface spoilage, and maintain product consistency across batches. Regulatory listings clarify that its purpose is functional and technical rather than sensory, underscoring that its role is to facilitate washing or surface removal operations rather than contribute to food composition in the final product.

Adi Example Calculation

Because no numeric ADI is established for ETHYLENE OXIDE/PROPYLENE OXIDE COPOLYMER, ALKYL ADDUCT, PHOSPHATE ESTER in major regulatory evaluations, an illustrative calculation using a hypothetical ADI is not presented. In general terms, an ADI-based calculation involves multiplying an established ADI (in mg per kg body weight per day) by a person’s body weight to estimate a tolerable exposure level, but – in the absence of a verified ADI – meaningful numerical examples cannot be provided.

Safety And Health Research

The safety evaluation of ETHYLENE OXIDE/PROPYLENE OXIDE COPOLYMER, ALKYL ADDUCT, PHOSPHATE ESTER focuses on its technical function and limited exposure scenario in wash solutions rather than systemic ingestion in significant amounts. Regulatory listings such as the FDA’s Substances Added to Food inventory identify its authorized use under specific conditions, which implies that the agency has considered its function and potential exposure when washed and rinsed from produce. However, detailed toxicological data such as chronic toxicity, reproductive studies, or carcinogenicity endpoints for this specific phosphate ester derivative are not readily accessible in primary regulatory evaluations. Because many polymeric surfactants share general low toxicity profiles due to limited absorption and large molecular size, authorities may rely on existing data and structural analogies when determining permissible usage conditions. The presence of this ingredient in regulated wash solutions rather than final food products means that consumer exposure is expected to be minimal after thorough rinsing, aligning with the concept that processing aids are not intended to contribute residues to the final food consumed.

Regulatory Status Worldwide

In the United States, ETHYLENE OXIDE/PROPYLENE OXIDE COPOLYMER, ALKYL ADDUCT, PHOSPHATE ESTER is listed in the FDA’s Substances Added to Food inventory (formerly EAFUS) with a CAS Registration Number 977083-03-6 and is recognized for a specific functional use as a washing or surface removal agent in accordance with 21 CFR 173.315. This section of the Code of Federal Regulations authorizes certain chemicals, including mixtures of alkylene oxide adducts and their phosphate esters, to be safely used in wash solutions for fruits and vegetables when conditions of use such as maximum levels are observed. Because the acceptance hinges on defined usage conditions rather than broad inclusion as a direct additive, regulatory status is specific to this technical application and concentration control in wash solutions. ETHYLENE OXIDE/PROPYLENE OXIDE COPOLYMER, ALKYL ADDUCT, PHOSPHATE ESTER is not given a general designation as an intentional food additive for consumption; instead, it is recognized for its limited processing function. Outside the United States, detailed evaluations by bodies such as the Joint FAO/WHO Expert Committee on Food Additives (JECFA) or the European Food Safety Authority (EFSA) are not readily available for this precise compound, and there is no clear indication of international food additive numbers or adoption of an E-number for this substance. The lack of internationally harmonized designation suggests that its use is subject to local regulatory frameworks and permissible conditions. Absent authoritative deep links to EFSA or JECFA evaluations specific to this ingredient, global regulatory positions beyond U.S. authorizations remain less defined in public databases.

Taste And Functional Properties

ETHYLENE OXIDE/PROPYLENE OXIDE COPOLYMER, ALKYL ADDUCT, PHOSPHATE ESTER does not contribute perceptible taste or aroma to food, consistent with its classification as a processing aid rather than a flavoring ingredient. Because the molecule is a surfactant, its functional properties relate to its behavior in aqueous systems rather than sensory attributes. In solution, its amphiphilic nature—comprised of ethylene oxide and propylene oxide segments with hydrophobic alkyl and phosphate ester groups—allows it to align at interfaces between water and nonpolar substances. This alignment reduces surface tension, improves wetting, and enhances the detachment of oils, waxes, and particulate matter from surfaces during washing or cleaning operations. The ethylene oxide-derived segments provide hydrophilicity and solubility in water, while the propylene oxide-derived and alkyl components interact with hydrophobic residues. The phosphate ester group further modulates the molecule’s polarity and interface activity. Functionally, this surfactant can contribute to more efficient contact between washing solutions and soiled surfaces, promoting thorough cleaning. Its stability in typical processing conditions, such as a range of pH values and moderate temperatures, supports its utility in industrial wash solutions. Because it is designed for processing environments, it is not evaluated for sensory qualities at levels encountered in end products, and sensory panels generally do not detect its presence. Its lack of flavor or aroma contribution is a reason it is considered a processing aid rather than a food ingredient intended for taste.

Acceptable Daily Intake Explained

An Acceptable Daily Intake (ADI) is a regulatory measure that represents an estimate of the amount of a chemical that can be ingested daily over a lifetime without appreciable health risk based on available toxicological data. In the case of ETHYLENE OXIDE/PROPYLENE OXIDE COPOLYMER, ALKYL ADDUCT, PHOSPHATE ESTER, no specific numeric ADI established by JECFA or EFSA is available in public regulatory sources, and dietary exposure from its use in wash solutions is expected to be minimal after rinsing. Because this compound is authorized under conditions that emphasize limited concentrations and subsequent removal from food surfaces, regulators do not provide general daily intake limits in the same way they do for additives directly incorporated into food. Therefore, an ADI value is not assigned here due to lack of authoritative evidence on systemic toxicity thresholds.

Comparison With Similar Additives

ETHYLENE OXIDE/PROPYLENE OXIDE COPOLYMER, ALKYL ADDUCT, PHOSPHATE ESTER shares its functional category with other nonionic surfactants used in food processing, such as ethoxylated fatty alcohols and phosphate esters of alkylene oxide adducts. Like these related surfactants, it reduces surface tension to aid in cleaning and wetting tasks, but its specific structure with phosphate ester groups offers a balance between hydrophilic and hydrophobic interactions that can be tuned for particular wash conditions. Compared to ethoxylated fatty alcohols without phosphate groups, the phosphate ester derivatives may provide different solubility and rinse characteristics, making them more suitable where interactions with ionic species or pH variations are factors. Another related class includes sucrose esters, which also serve as surfactants but are more commonly used for emulsification in food formulations rather than surface residue removal. Polysorbates (polyoxyethylene sorbitan esters) represent a well‑known family of surfactants that bridge similar functionality; however, their use is typically within food formulations rather than upstream wash processes. The comparison highlights that while functional overlap exists across surfactant families, differences in chemical structure influence their specific applications and regulatory allowances.

Common Food Applications Narrative

In commercial food processing environments, ETHYLENE OXIDE/PROPYLENE OXIDE COPOLYMER, ALKYL ADDUCT, PHOSPHATE ESTER is incorporated into wash solutions where produce or ingredients require removal of surface residues before further handling. For example, fruits and vegetables destined for canning or fresh-cut preparations often undergo washing and peeling steps where surfactants help remove soil, wax coatings, or debris that can interfere with uniform peeling or affect visual quality. In such applications, processors blend appropriate concentrations of surface-active agents into wash baths to enhance contact and reduce the mechanical effort needed for cleaning, supporting operational efficiency and consistency. This compound’s role is technical, contributing to the mechanics of washing and preparation rather than altering the sensory or nutritional profile of the product. In facilities that handle high-throughput volumes of produce, the inclusion of effective surfactants helps equipment perform as intended and reduces downtime for manual cleaning. While it is not present in finished packaged foods in significant amounts, its use in upstream steps supports overall food quality and hygiene. Processors follow regulatory guidance regarding allowable concentrations and follow wash and rinse procedures that minimize residual carryover into the final food product. By doing so, they maintain compliance with food safety regulations while ensuring that end products meet consumer expectations for cleanliness and appearance.

Safety & Regulations

FDA

  • Notes: Approved for specific use under 21 CFR 173.315 for washing/peeling; not a general food additive approval.
  • Regulation: 21 CFR 173.315

EFSA

  • Notes: No EFSA-specific approval or E-number found in authoritative sources.

JECFA

  • Notes: No specific JECFA evaluation or ADI was found for this compound.

Sources

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