ETHYLENE OXIDE POLYMER, ALKYL ADDUCT, PHOSPHATE ESTER

CAS: 977092-23-1 WASHING OR SURFACE REMOVAL AGENT

Ethylene oxide polymer, alkyl adduct, phosphate ester is a washing or surface removal agent permitted for specific food processing use under the U.S. FDA secondary direct food additive provisions.

What It Is

ETHYLENE OXIDE POLYMER, ALKYL ADDUCT, PHOSPHATE ESTER is a synthetic surfactant classified as a washing or surface removal agent for food processing. It is recognized by the Food and Drug Administration as an ingredient that can be used to wash or assist in peeling fruits and vegetables under 21 CFR 173.315, which permits certain chemicals for use in washing or surface removal processes. The substance has a CAS Registry Number of 977092-23-1 and is listed with other names that describe its chemical structure and composition. The agent functions primarily to aid in removing residues and surface contaminants from produce and is not intended for flavoring or fragrance purposes. Its role as a washing agent is distinct from many food additives that contribute to flavor, texture, or nutritional value, focusing instead on food preparation and processing steps. The ingredient is described in the FDA "Substances Added to Food" inventory with its technical effect specified for food contact use in wash and peel operations, indicating its acceptance in this limited use case by regulatory authorities in the United States. Its chemistry involves ethoxylated alkyl phosphate esters, a class of compounds often used for their surfactant properties in industrial settings.

How It Is Made

The manufacture of ETHYLENE OXIDE POLYMER, ALKYL ADDUCT, PHOSPHATE ESTER involves the ethoxylation of long-chain alkyl alcohols followed by the introduction of a phosphate ester group. In this process, an alkyl alcohol with a carbon chain length in the C12 to C18 range is reacted with ethylene oxide under controlled conditions to form polyoxyethylene chains of a specified average length. These polyoxyethylene segments impart hydrophilic properties to the molecule, enabling it to function as a surfactant. Subsequently, the hydroxyl-terminated ethoxylated product is esterified with phosphoric acid or a phosphoric anhydride reagent to form the phosphate ester moiety. The phosphate ester group enhances the overall surface activity and solubility in aqueous environments. After synthesis, the material may be purified to remove unreacted starting materials and byproducts. Quality control in manufacturing typically includes assessment of the average degree of ethoxylation and confirmation of the phosphate ester formation, though specific procedural details are proprietary to producers. Surfactants of this type are generally produced in chemical manufacturing facilities equipped to handle ethoxylation reactions and the safe handling of phosphorus-containing reagents.

Why It Is Used In Food

ETHYLENE OXIDE POLYMER, ALKYL ADDUCT, PHOSPHATE ESTER is used in food processing primarily to aid the washing or peeling of fruits and vegetables. Its surfactant properties help reduce surface tension between water and residues on produce surfaces, facilitating more effective removal of soil, debris, and other contaminants. In food processing operations, such intermediates are important because they can improve the efficiency of cleaning steps, potentially reducing processing times and water usage compared to simple water rinsing alone. The compound’s function aligns with regulatory allowances under U.S. secondary direct food additive provisions that recognize certain surface-active agents for use in produce washing. It does not contribute sensory properties such as taste or aroma to the food itself. Instead, it serves a technological purpose during preparation steps preceding consumption or further processing. The use of such agents can be particularly valuable in large-scale commercial produce handling where consistent cleaning results are desired. Because this agent is not intended to remain in significant quantities on foods offered for sale, its use is carefully regulated to ensure minimal residue after washing operations.

Adi Example Calculation

Because ETHYLENE OXIDE POLYMER, ALKYL ADDUCT, PHOSPHATE ESTER does not have a formally established acceptable daily intake, an illustrative calculation cannot be provided in terms of mg per kg body weight per day. In general, if a hypothetical ADI were to be established, it would involve identifying a no‑observed‑adverse‑effect level from toxicological studies and dividing by an appropriate safety factor to reflect uncertainties. For example, if a reference value of X mg/kg body weight were identified as safe in long‑term studies and a 100‑fold safety factor applied, the resulting ADI would be X/100 mg/kg body weight per day. Because no authoritative numeric ADI exists for this compound, this display serves simply to demonstrate the method used in regulatory toxicology rather than provide a specific guidance value.

Safety And Health Research

Regulatory inventories and technical listings indicate that ETHYLENE OXIDE POLYMER, ALKYL ADDUCT, PHOSPHATE ESTER is categorized for use in produce washing processes, with limited publicly available toxicological data. General safety evaluations for surfactants typically focus on acute toxicity, irritation potential, and environmental behavior, but specific data for this compound’s effects in humans or animals via dietary exposure are not readily published in regulatory summaries. In the FDA inventory entry, hazard classifications such as dermal or oral toxicity data are not determined or documented, and there are no specific label elements provided, indicating that detailed toxicological assessments may either be proprietary or not extensively characterized in publicly accessible literature. Researchers and risk assessors consider the context of use, which involves subsequent rinsing and minimal residual presence on food offered for consumption, when evaluating potential exposure. Without established acceptable daily intake values from authoritative bodies like the Joint Expert Committee on Food Additives, safety conclusions are based on limited functional use and regulatory controls rather than comprehensive toxicology data. Consequently, safety narratives emphasize the restricted application and technical purpose of the ingredient, rather than quantified health effects.

Regulatory Status Worldwide

In the United States, ETHYLENE OXIDE POLYMER, ALKYL ADDUCT, PHOSPHATE ESTER appears in regulatory inventories as an additive allowed for specific usage under 21 CFR 173.315, which governs chemicals used in washing or to assist in the peeling of fruits and vegetables. This CFR citation lists categories of substances and usage conditions under which they may be safely used in such processing steps, indicating regulatory acceptance for this narrow functional purpose. The compound’s inclusion in the FDA "Substances Added to Food" inventory with its technical effect supports this status, though it is not approved for flavor or fragrance use. There is no widely recognized European Union food additive number or E‑number associated with this ingredient, and it is not listed in prominent EU food additive regulations. International standards such as those from JECFA do not appear to assign an INS number or specific ADI for this compound, reflecting its limited scope of permitted use and the nature of its application in processing rather than as a food constituent. Regulatory frameworks outside of the U.S. may treat similar phosphate ester surfactants under broader chemical or food contact material provisions rather than explicit additive listings.

Taste And Functional Properties

ETHYLENE OXIDE POLYMER, ALKYL ADDUCT, PHOSPHATE ESTER is not used for its taste, as it functions as a surface‑active agent rather than a flavoring or seasoning. Surfactants like this are designed to lower the surface tension of water, which enhances wetting and aids in the removal of soils and residues during washing processes. The functional properties arise from its molecular structure, which combines hydrophobic alkyl chains with hydrophilic ethoxylated segments and a phosphate ester group, enabling the compound to interact with both water and organic residues on produce surfaces. In aqueous solutions, such molecules organize at interfaces to improve the contact between water and hydrophobic surfaces, increasing the efficiency of contaminant removal. The presence of the phosphate ester group contributes to solubility in water and can improve handling characteristics in industrial cleaning solutions. The compound’s sensory profile, if any, would be negligible since it is intended for processing steps that are followed by rinsing, not for direct consumption. Because it is structured to function at low concentrations in wash solutions, its physical properties such as solubility and surface activity are key to its performance, while taste attributes are not part of its role in food processing.

Acceptable Daily Intake Explained

An acceptable daily intake (ADI) is a regulatory construct used by food safety authorities to estimate the amount of a substance that can be consumed daily over a lifetime without appreciable risk, based on toxicological studies and safety factors. For many food additives, ADIs are established following comprehensive evaluation of animal and other data. However, ETHYLENE OXIDE POLYMER, ALKYL ADDUCT, PHOSPHATE ESTER does not have an ADI established by international bodies such as JECFA or the European Food Safety Authority, likely because its use is restricted to processing steps rather than direct addition to food as a constituent. In the absence of an established ADI, regulatory acceptance is centered on its functional application with controlled conditions and the expectation that it is largely removed before foods reach consumers. This section explains the general concept of an ADI for readers: it represents a conservative limit derived by identifying a no‑observed‑adverse‑effect level in studies and applying safety factors to account for uncertainties, ensuring margins of safety to protect human health.

Comparison With Similar Additives

ETHYLENE OXIDE POLYMER, ALKYL ADDUCT, PHOSPHATE ESTER can be compared with other surface‑active agents that serve processing functions, such as sodium alkyl sulfonates used in produce washing or ethoxylated alcohols used in industrial cleaning. Surfactants differ in their hydrophilic‑lipophilic balance, solubility, and regulatory status, which influence their selection for specific tasks. Unlike flavor additives that are evaluated for sensory impact and metabolic pathways, processing aids like ethoxylated phosphate esters are chosen for functional properties such as wetting and emulsification and are regulated based on use conditions. Regulatory frameworks, like 21 CFR 173.315, provide specific permissions for certain surfactants in produce washing contexts, whereas other surfactants may be authorized under different provisions or food contact material standards. By focusing on similar functional categories, processors select agents that balance cleaning efficacy with regulatory compliance and minimal residual presence on foods.

Common Food Applications Narrative

In commercial food processing, certain specialized agents are permitted for use in preparatory steps such as washing or peeling that precede packaging or further transformation of produce. One such agent is ETHYLENE OXIDE POLYMER, ALKYL ADDUCT, PHOSPHATE ESTER, which is used specifically to support the washing and surface removal of soils and residues from fruits and vegetables. During produce processing, this ingredient can be incorporated into wash water or lye peeling solutions to facilitate the removal of impurities that would otherwise be difficult to eliminate with plain water. The surfactant action helps water penetrate and lift particulate matter from the surface of produce like apples, potatoes, and leafy greens, supporting more efficient cleaning operations. Because fruits and vegetables enter food supply chains with variable surface contaminants depending on farming practices, transport conditions, and environmental exposure, processors employ surface‑active agents to help standardize outcomes across batches. In such applications, the ingredient is not intended to alter the food’s sensory qualities but rather to improve the technical performance of washing or peeling steps. After processing, foods are typically rinsed, and any residual surfactant is minimized before further packaging or distribution. These uses enable processors to meet quality and safety expectations while maintaining throughput in high‑volume facilities.

Safety & Regulations

FDA

  • Approved: True
  • Regulation: 21 CFR 173.315

EFSA

  • Notes: No EFSA authorization or E number listed in available regulatory inventories

JECFA

  • Notes: No JECFA INS or ADI found in authoritative food additive specifications

Sources

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