STARCH, BLEACHED
**STARCH, BLEACHED** is a processed form of starch treated to lighten color and improve its suitability as a food additive. It is included in food additive inventories with CAS number 977075-42-5 and functions as a thickener, stabilizer, emulsifier, and binder in food production.
What It Is
Bleached starch refers to a type of modified food starch that has undergone a bleaching process to remove natural color and impurities and is supplied as a white or nearly white powder or granules. It is derived from native starch sources such as corn, potato, wheat, or tapioca but is processed through chemical treatments such as oxidation with hydrogen peroxide, peracetic acid, sodium hypochlorite, or other permitted agents according to good manufacturing practices. The purpose of the bleaching is largely cosmetic, yielding a lighter appearance without fundamentally changing the base structure of the starch polymers, which remain long chains of glucose units linked primarily by alpha 1-4 and alpha 1-6 glycosidic bonds. Because of its processed nature and food applications, bleached starch is categorized with other modified starches under various regulatory systems, and it is recognized functionally for its thickening, stabilizing, emulsifying, and binding properties in foods. The International Numbering System classifies bleached starch with the INS number 1403 for reference in global food standards.
Why It Is Used In Food
Bleached starch is used in food production for its ability to provide structure, texture, and stability in a wide range of products. As a thickener, it can increase viscosity in sauces, puddings, and dairy preparations; as a stabilizer and emulsifier, it helps maintain homogeneous mixtures where fat and water phases coexist; and as a binder, it contributes to the cohesion of ingredients in formulated products. The primary additional reason to choose bleached starch over native starch is its lighter color, which enhances the visual appeal of foods where a white or translucent appearance is desirable. Because the bleaching process removes off-colors and impurities, products that rely on a clean appearance, such as cream-based desserts or light-colored sauces, can benefit from its use. Its versatility and compatibility with many food systems make it a commonly selected functional ingredient in the food industry. (FAOHome
Adi Example Calculation
Because bleached starch is assigned an ADI of "not specified" by JECFA, a numerical calculation using body weight and hypothetical intake is not applicable in this context. An ADI of "not specified" reflects the judgment of regulatory experts that, at the levels necessary to achieve the desired technical effects in foods and under conditions of good manufacturing practice, the additive does not raise safety concerns that require a numerical daily intake threshold. In contrast to additives with defined mg per kg body weight ADIs, this status conveys that routine consumption within authorized uses is not expected to result in meaningful toxicological risk based on current data. (inchem.org
Safety And Health Research
Safety evaluations for bleached starch and related modified starches have been conducted by authoritative bodies such as JECFA, which established that an acceptable daily intake does not need to be specified, reflecting that at typical use levels and under good manufacturing practices, no safety concerns warrant a numerical ADI. This status is consistent with evaluations of other starch-based additives that undergo minimal chemical alteration beyond color removal. Regulatory review focuses on general toxicology and compositional analyses, including considerations of residual processing agents, potential impurities, and exposure from food use. The lack of a specified ADI reflects the low level of concern based on available data, but it remains incumbent on manufacturers and regulators to adhere to quality specifications to limit residual reagents and ensure consistent product safety. Ongoing scientific interest in the behavior of starches in food systems supports understanding of how processing affects functionality, but the existing regulatory status indicates that bleached starch is considered safe for its intended uses within established conditions. (inchem.org
Regulatory Status Worldwide
In the United States, bleached starch is included in the food additive regulations under the Code of Federal Regulations at 21 CFR 172.892, which governs food starch-modified products and permits their safe use in food when employed within good manufacturing practice and subject to specified limitations. This regulation applies to starches that have been modified, including through bleaching, to achieve desired technical effects. Internationally, bleached starch is recognized under the Codex General Standard for Food Additives with INS number 1403, and the Codex GSFA outlines permitted uses under conditions of good manufacturing practice across food categories. According to the Joint FAO/WHO Expert Committee on Food Additives (JECFA) evaluations and specifications, a formal acceptable daily intake is "not specified," indicating that the compound does not require a numerical ADI based on available safety data and typical use levels. These regulatory frameworks support the safe inclusion of bleached starch in food products when used according to established standards and practice. (联邦公报
Taste And Functional Properties
Bleached starch exhibits neutral sensory characteristics, with little to no perceptible taste or aroma in finished food products, making it suitable for use where the natural flavor profile of the food should remain prominent. Functionally, it behaves similarly to native starch when used as a thickening agent: upon heating in water, the starch granules swell, absorbing water and increasing the viscosity of the system. Its performance as a stabilizer and emulsifier supports the formation and maintenance of stable suspensions and emulsions in a variety of food matrices. Because the bleaching process primarily affects color without majorly altering the underlying starch chemistry, bleached starch retains the key functional behaviors of starch in aqueous systems. Its stability under heating and its capacity to form gels or thicken liquids are attributes that food formulators exploit across product categories ranging from dairy to confectionery.
Acceptable Daily Intake Explained
Regulatory bodies such as the Joint FAO/WHO Expert Committee on Food Additives (JECFA) assess the toxicological database for food additives and determine whether an acceptable daily intake (ADI) needs to be established. For bleached starch, JECFA has designated the ADI as "not specified," indicating that based on available safety and exposure data, setting a numerical limit was not considered necessary. An ADI that is "not specified" typically means that the additive does not pose a health concern at the levels used in food products when good manufacturing practices are followed. It is important to understand that an ADI is a conservative reference used by regulators to ensure that chronic exposure remains within safe bounds; it does not represent a target for individual consumption but rather a tool for risk assessment and regulatory oversight. (inchem.org
Comparison With Similar Additives
Bleached starch belongs to the broader family of modified starches, which include acid-treated starch (INS 1401), alkaline-treated starch (INS 1402), and oxidized starch (INS 1404). Compared with acid- or alkaline-treated starches, which undergo chemical treatments that alter functional properties such as gelatinization temperature or viscosity profiles, bleached starch primarily differs in its aesthetic outcome, achieving a lighter color while retaining the fundamental thickening behaviors of the native starch. Oxidized starch, another related additive, undergoes more extensive chemical modification that introduces carboxyl groups and can change functional performance, especially in film-forming applications. The decision to employ bleached starch over other modified starches typically depends on formulation goals including visual appeal, texture requirements, and processing conditions, with each class offering distinct functional advantages for different food systems. (维基百科
Common Food Applications Narrative
Bleached starch is incorporated into an array of processed food products where its functional properties and neutral sensory characteristics provide value to texture and stability without imparting flavor. It is commonly found in sauces and gravies, where its thickening capacity helps achieve the desired mouthfeel and consistency. In dairy-based desserts and custards, it supports creamy texture and stabilizes the mixture during heat processing. In bakery products, bleached starch contributes to moisture retention and structure, enhancing crumb quality. Its application extends to confectionery and fruit fillings, where consistent texture and an absence of undesired color are sought. Ready-to-eat soups and salad dressings also benefit from the stabilizing and thickening functions of bleached starch. Across these applications, bleached starch supports product quality while permitting manufacturers to maintain the visual and textural attributes that consumers expect in finished foods. (FAOHome
Safety & Regulations
FDA
- Notes: Included under food starch-modified regulation; specific approval inferred from regulation listing
- Regulation: 21 CFR 172.892
EFSA
- Notes: EFSA-specific numeric ADI not confirmed via authoritative link
JECFA
- Notes: JECFA ADI not specified; numeric year not explicitly shown on d entry
- Ins Number: 1403
- Adi Display: Not specified
Comments
Please login to leave a comment.
No comments yet. Be the first to share!