STARCH, FOOD, MODIFIED: DISTARCH PHOSPHATE (FROM PHOSPHORUS OXYCHLORIDE)

CAS: 977088-75-7 STABILIZER OR THICKENER

STARCH, FOOD, MODIFIED: DISTARCH PHOSPHATE (FROM PHOSPHORUS OXYCHLORIDE) is a chemically modified starch used as a stabilizer and thickener in food formulations. It is listed in US FDA food additive regulations under 21 CFR 172.892 and 175.105 for specific food and food contact uses, and has been evaluated by the Joint FAO/WHO Expert Committee on Food Additives without an ADI requirement.

What It Is

STARCH, FOOD, MODIFIED: DISTARCH PHOSPHATE (FROM PHOSPHORUS OXYCHLORIDE) is a chemically modified carbohydrate polymer derived from native starch sources such as corn, potato, or tapioca. This ingredient belongs to the class of modified starches, which are polysaccharides in which some of the natural hydroxyl groups on the glucose units have been altered through a chemical reaction. In this specific case, the starch undergoes esterification and cross-linking with phosphorus oxychloride, a chemical reagent that creates covalent phosphate bridges between starch chains. The result is a distarch phosphate derivative that exhibits enhanced functional properties compared with native starch, particularly in its ability to stabilize and thicken aqueous systems. Modified starches are widely used in the food industry to control texture, viscosity, and stability of products, and distarch phosphate is recognized for its performance under conditions of heat, shear, and variable pH that can occur during processing and storage. Although the specific CAS number for this phosphorus oxychloride modified form is 977088-75-7, distarch phosphate more broadly is associated with the International Numbering System (INS) code 1412, indicating its inclusion in the global system for numbering food additives as a stabilizer and thickener. Regulatory listings, such as those in US food additive regulations, provide the legal framework for its use in foods and food contact applications.

How It Is Made

The production of STARCH, FOOD, MODIFIED: DISTARCH PHOSPHATE (FROM PHOSPHORUS OXYCHLORIDE) begins with a native starch source, such as corn, wheat, tapioca, or potato starch. Native starch is a high molecular weight carbohydrate composed of glucose units linked predominantly by alpha-1,4 glycosidic bonds, with branching through alpha-1,6 linkages. To generate distarch phosphate, manufacturers disperse the starch in an aqueous medium and adjust the conditions to alkaline pH to activate the hydroxyl groups on the glucose residues. In this activated state, the starch is more reactive toward chemical reagents. A phosphorylating agent, in this instance phosphorus oxychloride, is introduced under controlled temperature and pH conditions. Phosphorus oxychloride facilitates the formation of covalent bonds between hydroxyl groups on separate starch chains, effectively cross-linking the polymer. These covalent phosphate bridges increase the stability of the starch granules and reduce the tendency of the modified starch to break down under thermal or mechanical stress. After the reaction reaches the desired degree of substitution, the mixture is neutralized and subjected to purification steps, which typically include washing and drying to remove unreacted reagents, salts, and other byproducts. The final product is a white to off-white powder with modified functional properties compared with the native starch. The overall process must comply with good manufacturing practice (GMP) to ensure that residual reagents and byproducts are minimized and meet relevant food safety specifications. Specifications for modified starches, including distarch phosphate derivatives, are outlined in international monographs and regulatory compendia that define acceptable limits for purity, moisture, and other quality attributes. These specifications help ensure consistency in performance and safety when the ingredient is incorporated into food formulations.

Why It Is Used In Food

STARCH, FOOD, MODIFIED: DISTARCH PHOSPHATE (FROM PHOSPHORUS OXYCHLORIDE) is used in food systems primarily for its functional properties, especially as a stabilizer and thickener. In food formulation, stabilizers help maintain uniform texture and prevent phase separation, while thickeners adjust and control viscosity, contributing to mouthfeel and structural integrity of the finished product. Native starches have limitations, such as breakdown under heat or acidic conditions, but chemical modification through cross-linking with reagents like phosphorus oxychloride enhances functional robustness. In practical terms, this ingredient allows food manufacturers to achieve specific textural outcomes in products that undergo processing conditions that might degrade native starches. For example, heating during pasteurization, freezing and thawing cycles in frozen foods, or mechanical shear in high-speed mixing can challenge the stability of starch-based thickeners. The cross-linked structure in distarch phosphate improves resistance to these stresses, helping maintain product consistency and quality throughout processing, storage, and consumption. Beyond physical stability, this modified starch can also influence sensory attributes. It contributes to a smooth, uniform texture that is desirable in sauces, gravies, puddings, and dressings, and can prevent syneresis, where water separates from a gel over time. In addition, it aids in controlling the rheological properties of doughs and batters in baked goods, contributing to volume and crumb structure. While primarily a functional additive, its use must be within the limits specified by food safety authorities, and its inclusion in ingredient lists should be transparent to comply with labeling regulations. The benefits of using this ingredient revolve around improved process tolerance and consistent product quality, especially in complex formulations where texture and stability are critical to consumer acceptance.

Adi Example Calculation

Because STARCH, FOOD, MODIFIED: DISTARCH PHOSPHATE (FROM PHOSPHORUS OXYCHLORIDE) has an ADI classification of ‘‘not specified’’ by authoritative evaluators such as JECFA, there is no numeric ADI value to use in a traditional calculation example. In conventional ADI scenarios, a numeric value allows illustrative calculations; for example, if an ADI were 10 mg/kg bw/day, a person weighing 70 kg could theoretically consume up to 700 mg per day without exceeding that limit. However, for substances with an ADI ‘‘not specified,’’ such as this modified starch, the regulatory interpretation is that expected dietary exposure from use as a stabilizer or thickener in foods is not considered to pose a health risk when used with good manufacturing practice. This means that the ingredient’s use levels in foods are generally well below any threshold of concern identified in safety evaluations. The absence of a numeric ADI does not imply unlimited consumption but rather that the typical dietary levels associated with functional use do not require a specific mg/kg bw/day limit. Therefore, illustrative calculations using a numeric ADI are not applicable in this context.

Safety And Health Research

Safety assessments of STARCH, FOOD, MODIFIED: DISTARCH PHOSPHATE (FROM PHOSPHORUS OXYCHLORIDE) and related phosphorylated starches have been conducted by scientific bodies to evaluate potential toxicological concerns. The Joint FAO/WHO Expert Committee on Food Additives (JECFA) evaluated distarch phosphate and related modified starches and concluded that an ADI ‘‘not specified’’ was appropriate for these substances, indicating that total daily intake arising from their use at levels necessary to achieve technological function does not pose a health hazard. This conclusion reflects reviews of available toxicology data, including short-term feeding studies in animals, where high dietary levels of similar modified starches did not produce adverse effects that could be directly attributed to the substance. JECFA’s ‘‘not specified’’ designation is used for substances with low toxicity and extensive use history, where the safety database and expected intake patterns do not warrant a numerical ADI. Animal studies on phosphated distarch phosphate derivatives have been reported in older toxicological literature, where diets containing varying proportions of modified starch did not reveal consistent adverse changes in general health, organ weights, hematology, or serum chemistry compared with controls. In longer-term studies, no significant evidence of carcinogenicity or systemic toxicity was observed, although some incidental findings were documented in specific tissues; these were interpreted in the context of dietary imbalances rather than direct compound-related effects. The metabolic fate of the phosphate moieties has not been extensively studied, but overall, modified starches are considered to be digested and metabolized similarly to native starches, with partial hydrolysis by digestive enzymes and fermentation of carbohydrate residues by gut microbiota. While the specific phosphorus oxychloride modification introduces cross-linked phosphate groups, available evaluations have not identified unique toxicity concerns at typical uses. Despite these assessments, modern regulatory evaluations emphasize the importance of adherence to defined use levels and good manufacturing practice. Safety research continues to monitor potential effects, including any emerging data on digestive tolerance or interactions with nutrient absorption, but no authoritative body has found evidence necessitating a quantitative ADI for this ingredient. Consumers requiring specific dietary guidance or individuals with known sensitivities to modified starches should refer to product labeling and regulatory disclosures, as the ingredient is generally included within broader categories of modified starches rather than as an isolated entity in safety literature.

Regulatory Status Worldwide

Regulatory frameworks govern the use of STARCH, FOOD, MODIFIED: DISTARCH PHOSPHATE (FROM PHOSPHORUS OXYCHLORIDE) in food and food contact applications to ensure safety and appropriate usage. In the United States, this ingredient appears in the FDA’s Substances Added to Food inventory, and it is recognized under regulations that permit the use of certain modified starches as direct food additives when used in accordance with good manufacturing practice. Specifically, food starch-modified provisions are found in 21 CFR 172.892, which lists modified starches permitted for direct addition to food, and 21 CFR 175.105 for components of adhesives in food contact applications. These regulatory citations define the conditions under which this ingredient may be safely incorporated into foods and food packaging systems to provide technological function without posing an undue risk to consumers. FDA’s listing in these sections reflects a long-standing evaluation of the safety of modified starches, including distarch phosphate, based on available data and historical use patterns. However, FDA does not publish a numeric acceptable daily intake (ADI) for this ingredient, and approval is tied to compliance with specified regulatory sections rather than a quantified exposure limit. At the international level, the Joint FAO/WHO Expert Committee on Food Additives (JECFA) has evaluated distarch phosphate derivatives and listed INS 1412 as the code for distarch phosphate in the international numbering system for food additives. According to JECFA’s database, specifications have been considered for this modified starch, but an ADI ‘‘not specified’’ was concluded, indicating that, on the basis of available data including toxicological assessments and expected food use levels, total daily intake does not represent a hazard to health. This ‘‘not specified’’ designation applies broadly to modified starches including distarch phosphate when used at levels necessary to achieve their technological function and consistent with good manufacturing practice. The absence of a numeric ADI suggests a wide margin of safety for typical uses. Other jurisdictions, such as those following Codex Alimentarius guidelines, also recognize modified starches like distarch phosphate within their food additive lists, often aligning with the INS code 1412. Regulatory acceptance may vary by country, but in many regions modified starches are permitted as thickeners and stabilizers under conditions that ensure safe use. Food business operators should consult local regulations and ensure compliance with applicable maximum use levels and labeling requirements.

Taste And Functional Properties

STARCH, FOOD, MODIFIED: DISTARCH PHOSPHATE (FROM PHOSPHORUS OXYCHLORIDE) is virtually neutral in taste, meaning it does not contribute pronounced flavors to food products. This neutrality is a key reason why it is suitable for a wide range of applications where flavor integrity is important. In terms of appearance, the compound is typically an off-white to white powder, which disperses in aqueous systems without imparting color or turbidity when used at typical usage levels. The sensory contributions of this ingredient are predominantly textural rather than flavor-related. The core functional property of this modified starch is its ability to modify the viscosity and stability of aqueous systems. When dispersed in water and subjected to heat, the cross-linked structure of distarch phosphate creates a viscous network that increases the thickness of the solution or gel. This behavior is exploited in applications such as sauces, soups, and pie fillings where a specific thickness and mouth-coating texture are desired. Unlike some thickeners that may break down under high shear or extremes of pH, distarch phosphate maintains its functional properties due to the covalent cross-links introduced during modification. Another notable functional attribute is freeze-thaw stability. In many food systems that undergo freezing during storage and thawing during preparation or consumption, native starches tend to undergo retrogradation, leading to syneresis or weeping of water. The chemical modifications in distarch phosphate mitigate this effect, allowing products like frozen desserts and ready-to-heat meals to retain a desirable texture after temperature fluctuations. The ingredient also contributes to gel clarity and reduces lumping when hydrated properly, making it a preferred choice in industrial settings where uniform texture and ease of processing are priorities. From a sensory standpoint, this modified starch does not contribute sweetness, bitterness, or other taste qualities, allowing it to function purely as a texturizer and stabilizer. Its impact on mouthfeel is perceived as smoothness and body rather than flavor, and it can help create a pleasing consistency without heaviness or graininess. Because it does not interfere with flavor compounds, it is compatible with a broad range of savory and sweet products.

Acceptable Daily Intake Explained

The concept of acceptable daily intake (ADI) helps regulators express the amount of a food additive that can be consumed on a daily basis over a lifetime without appreciable health risk. For many food additives, numeric ADI values are established based on toxicological studies in animals and, where available, human data. These numeric values are usually expressed in milligrams of the additive per kilogram of body weight per day (mg/kg bw/day). In the case of STARCH, FOOD, MODIFIED: DISTARCH PHOSPHATE (FROM PHOSPHORUS OXYCHLORIDE), authoritative evaluations such as those conducted by the Joint FAO/WHO Expert Committee on Food Additives (JECFA) have resulted in an ADI classification of ‘‘not specified.’' This designation means that, on the basis of available data and expected use levels, the total daily intake of the substance from its use in food does not represent a hazard to health. An ADI ‘‘not specified’’ is used for substances with low toxicity and extensive use history, where conventional toxicology data do not indicate a need for a numerical limit. It is important to understand that an ADI ‘‘not specified’’ is not an invitation to consume unlimited quantities; rather, it reflects a scientific assessment that typical dietary exposure, even over a lifetime, is not expected to cause harm when the additive is used in accordance with good manufacturing practice. Regulatory bodies consider both the inherent toxicity of the substance and realistic estimates of exposure based on food consumption patterns. For modified starches like distarch phosphate, which are largely similar in metabolic behavior to native starches and are used in relatively low quantities to achieve specific functional effects, this designation indicates a broad safety margin. Consumers might encounter the term ADI on regulatory or scientific documents, but it is not typically a label claim on food products. Instead, the ADI concept provides a basis for regulatory approvals and usage conditions that ensure food additives are used at levels consistent with safety. The ‘‘not specified’’ ADI for this ingredient underscores that, under current evaluations and typical use scenarios, it does not warrant a strict numeric limit, distinguishing it from additives with known dose-dependent effects where specific mg/kg values are set.

Comparison With Similar Additives

STARCH, FOOD, MODIFIED: DISTARCH PHOSPHATE (FROM PHOSPHORUS OXYCHLORIDE) can be compared with other modified starch additives to highlight differences in functionality and typical uses. One comparable additive is monostarch phosphate (INS 1410), which involves phosphorylation of starch without extensive cross-linking. Monostarch phosphate primarily acts as a thickener and stabilizer but offers less resistance to heat and mechanical shear than distarch phosphate, making the latter preferable in applications requiring high process tolerance. Another related additive is hydroxypropyl distarch phosphate (INS 1442), which combines hydroxypropylation with cross-linking to further enhance freeze-thaw stability and clarity in gels, often used in products where visual appearance and texture after freezing are critical. While both distarch phosphate and hydroxypropyl distarch phosphate serve as stabilizers, the hydroxypropylated form can provide additional functional advantages such as improved cold water solubility and reduced retrogradation in certain systems. Acetylated distarch phosphate (INS 1414) is another modified starch that incorporates acetyl groups along with phosphate cross-links. This additive tends to impart both textural modification and improved tolerance to acidic conditions compared with unmodified starch. Each of these modified starches retains the general role of modifying viscosity and texture in food products, but their specific chemical modifications influence functional properties such as tolerance to processing stresses, clarity of gels, and compatibility with other ingredients. In selecting among these additives, food formulators consider the specific demands of the product, such as thermal stability, freeze-thaw resilience, and sensory attributes. Distarch phosphate’s cross-linked structure positions it as a robust thickener and stabilizer for applications where consistent performance under stress is essential.

Common Food Applications Narrative

STARCH, FOOD, MODIFIED: DISTARCH PHOSPHATE (FROM PHOSPHORUS OXYCHLORIDE) finds use across a broad spectrum of food products where texture, stability, and consistency are essential to product quality. In prepared foods, it serves as a thickener and stabilizer that helps achieve a uniform mouthfeel and prevents phase separation in systems prone to breakdown under heat or mechanical stress. For example, in sauces and gravies, this modified starch contributes to a smooth, cohesive texture that resists thinning during heating or storage. It also plays a role in pie fillings and dessert gels, where maintaining a stable gel structure over time enhances consumer satisfaction. In dairy-based products, such as puddings, custards, and some frozen desserts, the use of distarch phosphate can improve creaminess and help retain moisture during freeze-thaw cycles. This stability is especially valuable in products that are manufactured at scale and require extended shelf life or distribution through variable temperature conditions. Similarly, in salad dressings and condiment emulsions, the ingredient supports a consistent suspension of oil and aqueous phases, preventing separation and contributing to a uniform pour and cling on food surfaces. Baked goods and snack applications also benefit from the functional properties of this modified starch. It can help control dough rheology, influence crumb structure, and contribute to moisture retention in products like breads, crackers, and cereal bars. In gluten-free formulations where native starch functionality is critical, distarch phosphate helps simulate desirable textural characteristics typically provided by gluten networks. The ingredient’s ability to withstand processing stresses makes it a useful tool for manufacturers aiming to deliver consistent product quality. Across these applications, the inclusion of distarch phosphate is guided by both its technical performance and regulatory acceptance. Ingredient labeling reflects its use as a modified starch, reassuring consumers and regulators that the functional properties it imparts are achieved within approved frameworks. Its versatility and compatibility with diverse formulations have made it an important additive in the food industry, especially in products where texture and stability are central to consumer experience.

Safety & Regulations

FDA

  • Notes: Included in FDA food additive regulations under these sections, but a specific numeric approval status is not provided in a single labeled approval statement.
  • Regulation: 21 CFR 172.892; 21 CFR 175.105

EFSA

  • Notes: EFSA re-evaluated modified starches, but specific numeric ADI for this CAS variant was not identified from authoritative EFSA documents.

JECFA

  • Notes: JECFA lists INS 1412 with an ADI not specified designation, indicating low toxicity; the exact report year was not explicitly shown.
  • Ins Number: 1412
  • Adi Display: ADI not specified

Sources

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