CHOLINE CHLORIDE(ALSO INCLUDES CHOLINE)

CAS: 977188-01-4 FLAVORING AGENT OR ADJUVANT

Choline chloride (also includes choline) is a chemical substance characterized as a flavouring agent or adjuvant in food applications according to FDA inventory listings, with a complex regulatory background across global safety bodies. Its CAS number (977188-01-4) reflects the specific mixture identification used in the U.S. food additive inventory rather than the base compound CAS associated with the pure choline chloride chemical structure.

What It Is

What It Is Choline chloride (also includes choline) is recognized in food ingredient inventories as a substance used for its flavouring agent or adjuvant function when added to foods. In chemical terms, choline chloride is a salt composed of a choline cation and a chloride anion with a long history of use in various industrial, nutritional, and food contexts. The form identified in this entry corresponds to a specific inventory listing under CAS number 977188-01-4, which represents a mixture containing choline chloride and choline rather than the pure choline chloride compound itself. While the pure compound choline chloride is typically associated with CAS 67-48-1, the inventory entry for food use is listed under the moniker “CHOLINE CHLORIDE(ALSO INCLUDES CHOLINE)” and may encompass formulations or sources that combine choline and its chloride salt for functional purposes in food processing and formulation. Choline, the nutrient component, is an essential organic compound often grouped with B vitamins in nutritional contexts due to its role as a precursor for cell membrane components and the neurotransmitter acetylcholine in the body. In regulatory listings, the substance is primarily categorized for technical effect rather than nutritional contribution in foods. In the U.S. FDA’s Substances Added to Food (formerly EAFUS) inventory, it appears with this specific CAS and is defined by its functional classification as a flavouring agent or adjuvant. A flavouring agent typically contributes to the taste or aroma profile of a food product, whereas an adjuvant might enhance other flavouring components or modify how sensory properties are perceived. The mixture naming highlights that both choline chloride and the associated choline moiety are covered, which may influence solubility, sensory behavior, or interaction with other components in the food matrix. Globally, choline chloride and related compounds have been assessed by expert scientific committees such as the Joint FAO/WHO Expert Committee on Food Additives (JECFA) for safety and specifications when included in food and flavour applications, though the specific inventory mixture listing may not correspond exactly to those evaluations.

How It Is Made

How It Is Made Choline chloride for industrial and food-related purposes is generally produced through controlled chemical synthesis processes starting from precursors such as trimethylamine and ethylene oxide or analogous reagents. In typical industrial practice, trimethylamine—a quaternary amine—reacts with an epoxide such as ethylene oxide under regulated conditions to form the choline base, which is subsequently neutralized with hydrochloric acid to yield choline chloride. The resulting product is a crystalline solid that is highly soluble in water and hygroscopic in nature. Under good manufacturing practice (GMP) conditions, the synthesis includes steps to purify the final product and ensure it meets specification criteria for chemical identity, purity, and absence of contaminants that could adversely affect food quality or safety. For food applications, the finished choline chloride product or mixture is typically characterized by established analytical specifications that define its acceptable identity parameters including assay limits, allowable impurities, and moisture content. Expert committees, such as the Joint FAO/WHO Expert Committee on Food Additives (JECFA), publish specification documents that include criteria for identity and purity to guide producers and regulators in ensuring food safety, though the pure compound specification may differ from mixture listings in national inventories. The specific inventory entry associated with the CAS number 977188-01-4 denotes a mixture of choline and choline chloride rather than the standalone pure salt, which reflects how producers might supply the ingredient for use in food formulation. In manufacturing for food use, producers must adhere to all applicable quality systems and regulatory requirements that govern food ingredient supply chains, including traceability, analytical verification, and compliance with food-grade standards. This often involves additional testing for residual solvents, heavy metals, and microbiological contaminants in line with recognized standards such as the Food Chemicals Codex where applicable. Because choline chloride is water soluble and thermally stable under normal processing conditions, its manufacture and incorporation into liquid or dry blends for food applications is technologically straightforward, but must be carried out under controlled conditions to preserve quality and consistency across batches. Across production scales, from bulk industrial synthesis to smaller food-grade manufacturing operations, emphasis is placed on maintaining high purity and consistent physicochemical properties. In the context of inventory listings where choline chloride also includes choline, the mixture facilitates functional attributes in food processing without introducing extraneous or undefined constituents beyond what is represented in the regulatory designation.

Why It Is Used In Food

Why It Is Used in Food Choline chloride (also includes choline) is included in regulatory ingredient inventories for use as a flavouring agent or adjuvant. In practical terms, these functional classifications indicate why manufacturers consider including this ingredient in food formulations. As a flavouring agent, choline chloride can either directly contribute to taste characteristics or interact synergistically with other compounds to modify intensity, temporal dynamics, or persistence of flavour profiles in a finished product. As an adjuvant, the substance may be used to improve the distribution, stability, or sensory perception of other flavouring constituents. In many food systems, such adjuvant behavior is critical for achieving targeted sensory outcomes without excessive use of primary flavouring compounds. Beyond sensory roles, choline chloride and related choline compounds are physiologically relevant molecules with roles in lipid metabolism and as precursors to neurotransmitters, although the inventory listing as a flavouring agent or adjuvant does not signify that it is added for nutritional benefit per se. In foods where it is used under this classification, its function is technical rather than nutritional. Ingredient listings that denote technical effects such as this help food formulators and regulatory bodies understand the purpose for inclusion: providing perceived flavour contributions or supporting the performance of other sensory-active ingredients during processing and consumption. Manufacturers might select choline chloride in specific formulations when they require a compound that can integrate well in aqueous systems due to its high solubility, withstand typical processing conditions, and support desired sensory endpoints without significant off-notes. Because the food matrix and processing environment can alter how flavouring agents perform, formulators often look to compounds with predictable behaviour, including stability across pH ranges that are common in many food products. The characteristics of choline chloride that make it soluble and chemically stable also support its use as an adjuvant, where it may contribute to consistent delivery of flavour molecules throughout a product. Additionally, in some niche applications, choline chloride may be used in ingredient blends where its functional performance is complementary to other additives, such as in seasoning systems, beverage formulations, or other complex flavour architectures. Regardless of the application, the use of this ingredient is guided by regulatory classifications and inventory listings that define the permissible technical effects, such as flavouring or adjuvant roles, rather than broader nutritional use claims.

Adi Example Calculation

Illustrative ADI Example (Non‑Numeric) To illustrate how acceptable daily intake (ADI) concepts are applied in regulatory risk assessment—without assigning a specific numeric ADI for choline chloride in flavouring use—consider a hypothetical example where a chemical additive with an established ADI is present in a product. For instance, if an expert body sets an ADI of 10 mg per kg body weight per day for a hypothetical additive, a person weighing 70 kg would have a theoretical safety threshold of 700 mg per day (calculated as 10 mg/kg x 70 kg). In such a scenario, evaluators compare typical dietary exposures from food use to this threshold to determine whether cumulative intake remains below the ADI. For choline chloride, regulatory evaluations have concluded that there is no safety concern at current intake levels when used as a flavouring agent, and a numeric ADI has not been specified. In such cases, the principle is similar: risk assessors rely on estimates of typical exposure from intended uses and toxicology data demonstrating that anticipated intakes are significantly lower than levels associated with toxicity in studies. Without a numeric ADI, the focus remains on ensuring that exposure remains within ranges that expert committees have deemed safe based on comprehensive reviews of the evidence. This example is illustrative of the general approach used to interpret ADIs and exposure estimates in regulatory science, highlighting how toxicity thresholds and body weight considerations are combined to assess consumer safety. The absence of specific numeric ADI values for all additives underscores the importance of context, exposure data, and safety margins in regulatory assessments rather than strict reliance on numeric limits alone.

Safety And Health Research

Scientific and regulatory evaluations of choline chloride (also includes choline) focus on safety considerations associated with ingestion at levels expected from its use as a flavouring agent or adjuvant, with the primary emphasis on established toxicological data and expert risk assessments rather than physiological effect claims. Expert bodies such as the Joint FAO/WHO Expert Committee on Food Additives (JECFA) have reviewed choline chloride in the context of its functional use in foods and concluded that there are no safety concerns at current levels of intake when used as a flavouring agent. This type of evaluation reflects the committee’s comprehensive assessment of available toxicological and exposure data, which together inform risk characterizations. Toxicological studies on choline chloride and related compounds generally indicate low acute toxicity via oral exposure in laboratory animal models, with higher doses required to elicit overt toxic effects compared to typical exposure levels from food use. These studies often examine endpoints such as general toxicity, organ system effects, and potential propensity for adverse effects at varying dosages, with many findings supportive of a wide margin between likely human exposure via food and levels associated with toxicity in controlled studies. As a result, regulatory and scientific reviews have not identified specific hazard concerns directly tied to flavouring use, leading expert committees to characterize risks as minimal under normal conditions of use. It’s important to distinguish between the safety evaluation associated with choline chloride as a flavouring agent and broader nutritional research on choline as an essential nutrient. Choline itself is recognized as a necessary nutrient for humans, with defined adequate intake levels established by nutritional authorities, and is involved in physiological processes such as cell membrane synthesis and neurotransmitter pathways. However, regulatory safety evaluations for food additive use do not hinge on these nutritional roles, and expert committees specifically consider the toxicological profile relevant to additive exposures rather than dietary requirements or metabolism related to nutrient status. In the context of food additive safety assessments, factors such as genotoxicity, chronic toxicity, and reproductive endpoints may be examined when data are available, with data gaps addressed through conservative assumptions and safety factors. For choline chloride, available information has supported the conclusion of low concern at exposure levels typical for flavouring agents, and no warnings or restrictions have been adopted in authoritative evaluations based solely on additive use in foods.

Regulatory Status Worldwide

The regulatory status of choline chloride (also includes choline) varies across jurisdictions but is documented in authoritative food ingredient inventories and expert evaluations. In the United States, the substance appears in the FDA’s Substances Added to Food (formerly EAFUS) inventory with the specific designation “CHOLINE CHLORIDE(ALSO INCLUDES CHOLINE)” under CAS number 977188-01-4 and is classified for its technical effect as a flavouring agent or adjuvant in food applications. This inventory listing provides recognition of the ingredient’s use in food under conditions of good manufacturing practice, but does not by itself constitute an explicit approval with specified usage limits in the Code of Federal Regulations. As such, while listed, there is no direct citation of a CFR section that authorizes its use at defined levels, and regulatory oversight focuses on compliance with GMP and safety expectations for food ingredients. Internationally, choline chloride as a base compound has been evaluated by expert scientific bodies. The Joint FAO/WHO Expert Committee on Food Additives (JECFA) has assessed choline chloride and assigned it a flavouring agent functional classification in its evaluations. In the documented evaluation, JECFA did not identify safety concerns at current levels of intake when used as a flavouring agent, indicating that exposures from these uses were not expected to raise safety issues based on available data. However, JECFA did not establish a numeric acceptable daily intake (ADI), instead conveying the safety conclusion in qualitative terms, which aligns with expert risk assessment practice when intake estimates and toxicity data suggest low risk at typical use levels. Specific numeric ADI values were not published for choline chloride in this context. Regulatory bodies in other jurisdictions may also reference choline chloride and related choline compounds in their food additive or ingredient lists, though the exact designations and permissible conditions vary. Some regions classify choline chloride as a processing aid or allowed flavouring agent under general provisions for substances used at good manufacturing practice levels, while others provide more detailed chemical‑by‑chemical listings with specific conditions. Because regulatory frameworks differ in how they catalogue flavouring agents, formulators often consult local food law provisions to ensure compliance with applicable use criteria. In the European Union, explicit food additive regulations and lists (such as those specifying E‑numbers and conditions of use) may not directly enumerate choline chloride for the flavouring agent function, and the presence of choline chloride in foods may instead be governed by general provisions for flavourings and adjuvants. As regulatory landscapes evolve, ingredient listings and classifications are periodically updated based on new scientific data and risk assessments, underscoring the importance of consulting current regulatory databases or guidance documents when evaluating the status of any food ingredient in specific markets.

Taste And Functional Properties

Taste and Functional Properties Choline chloride itself is characterized as a hygroscopic, water-soluble crystalline compound with functional properties that make it useful in food sensory applications. The sensory profile of choline chloride is not typically described in isolation because its primary classification in food regulatory inventories is as a flavouring agent or an adjuvant rather than a standalone flavour component. In formulations where it contributes to taste, choline chloride is chosen for its ability to integrate smoothly into aqueous systems and interact with other flavour molecules to support or modify the overall perceived flavour experience without dominating the sensory profile. From a functional standpoint, the solubility of choline chloride in water is a key attribute that supports its performance in food systems where rapid dissolution and homogeneous distribution are requirements. Its solubility helps ensure even presence throughout the food matrix, which is especially important in liquid or semi-liquid products, dry blends that rehydrate, or systems where consistent flavour delivery across servings is desired. The physical properties of choline chloride—such as its hygroscopic nature—also mean that it can influence the moisture behavior of a product, which formulators consider when designing recipes or processing steps. This hygroscopicity, while beneficial in helping maintain dissolution, also requires careful handling during formulation and storage to prevent clumping or moisture uptake outside controlled conditions. In terms of functionality beyond sensory contributions, choline chloride’s interaction with other ingredients can affect how flavours are released during consumption. For example, in complex flavour systems, the presence of ionic compounds like choline chloride can modify the partitioning of volatile flavour molecules between the food matrix and the headspace that reaches the consumer’s nose, potentially altering perceived intensity or balance of sensory notes. Because flavour perception is multi‑modal—encompassing taste, smell, and mouthfeel—ingredients that support balanced flavour distribution without introducing off‑notes are valuable in developing palatable and consistent food products. Although choline and choline chloride are associated with physiological roles in nutrition, the functional properties relevant to food formulation focus on sensory integration and technical performance. Choline chloride’s stability under typical processing conditions, compatibility with aqueous environments, and predictable behaviour in blends make it a useful component in flavouring systems and adjuvant formulations where these attributes support broader formulation goals.

Acceptable Daily Intake Explained

The concept of an acceptable daily intake (ADI) is central to food additive safety evaluations conducted by expert bodies. An ADI represents an estimate of the amount of a substance that can be consumed daily over a lifetime without appreciable health risk, based on toxicological data and conservative safety factors. For choline chloride (also includes choline) specifically in the context of flavouring agent use, expert evaluations such as those by JECFA have not established a numeric ADI, instead concluding qualitatively that there are no safety concerns at current levels of intake from such applications. When regulatory bodies refrain from assigning a numeric ADI, it typically reflects confidence that typical exposures are well below levels associated with toxicity in relevant studies. It’s important to recognize that the ADI derived for food additive purposes is separate from dietary reference intakes established for nutrients including choline. Nutritional bodies define adequate intake levels based on the role of choline in human physiology, whereas food additive safety evaluations focus on potential risks associated with exposure from specific uses in food products. The absence of a numeric ADI for choline chloride in flavouring contexts does not imply unrestricted use, but rather indicates that based on current evidence and typical exposure estimates, there is no basis to identify a specific intake limit requiring quantification for safety. In practical regulatory practice, when a numerical ADI is established for a food additive, it guides risk assessors and regulators in estimating exposure levels from anticipated use patterns and ensuring that these exposures remain below safety benchmarks. Because choline chloride’s assessment as a flavouring agent concluded no safety concern at current intake levels without a defined ADI, risk managers rely on qualitative conclusions in conjunction with good manufacturing practice conditions to guide safe food use. Ultimately, the absence of a numeric ADI in this case reflects the breadth of the safety margin observed in toxicological data and the relatively low likelihood of significant exposure via flavouring applications.

Comparison With Similar Additives

Comparison With Similar Additives Choline chloride (also includes choline) shares functional and chemical similarities with several other compounds used in flavour systems and food formulation. One comparable group includes amino acid derivatives such as glycine and other ammonium salts used as flavouring agents or adjuvants. Like choline chloride, these salts can enhance flavour interactions or provide a neutral medium in which volatile flavour compounds can disperse effectively. However, the physiological roles of choline differ from those of simple amino acid derivatives; choline is involved in specific metabolic pathways such as membrane phospholipid synthesis and neurotransmitter precursor functions, whereas simple amino acids primarily serve as taste modulators or building blocks for other flavour molecules. Another class of compounds with related functionality includes small organic acids or their salts, such as sodium citrate or potassium lactate, which are used to modify taste perception, balance acidity, and stabilize flavour profiles. These salts, like choline chloride, are chosen for their solubility and compatibility with aqueous food systems, but their sensory impacts differ: citrate and lactate influence sourness or saltiness characteristics, whereas choline chloride’s contribution is typically more neutral and supportive of other flavour agents. Peptide‑based flavour enhancers such as monosodium glutamate (MSG) provide a contrasting example of how structurally different compounds can achieve flavour modulation. MSG acts directly on umami taste receptors, eliciting specific sensory responses, while choline chloride’s role is more ancillary, facilitating the overall performance of flavour blends rather than directly stimulating taste receptors to a significant extent. This highlights how functional classification—flavouring agent versus adjuvant—guides the choice of ingredient based on the desired sensory outcome and formulation strategy. These comparisons illustrate the range of technical approaches available to food formulators when selecting ingredients for flavour systems and underscore the importance of understanding both chemical properties and sensory contributions in additive selection.

Common Food Applications Narrative

Choline chloride (also includes choline) finds its place in modern food manufacturing as a technically classified flavouring agent or adjuvant ingredient with utility across a range of food product types. In many applications, the role of this ingredient is not as a primary flavour source but rather as a component that supports the sensory architecture of products by helping other flavouring compounds perform as intended. For example, in seasoned snacks, beverage bases, and other formulations where layered flavour complexity is desired, choline chloride may be included as part of a broader flavour system that enhances balance, integration, or consistency of flavour perceptions. In powdered or dry drink mixes, its high water solubility ensures that it dissolves readily upon preparation, contributing to a uniform sensory experience without leaving undissolved residues. In liquid and semi‑liquid products, such as sauces or dressings, choline chloride’s solubility and stability help maintain homogeneous dispersion of flavour components during storage and use. This is particularly important in products with complex ingredient lists that include natural extracts, aroma compounds, and other sensory modifiers. By acting as a technical agent that supports the distribution and performance of these flavour molecules, choline chloride helps reduce variability in sensory outcomes from batch to batch and serving to serving. Beyond its use in finished consumer products, choline chloride may also be employed in intermediate food processing steps where precise control of sensory attributes is important. In seasoning blends that require uniform distribution of taste components on snack surfaces or in powdered soups, for instance, the ingredient’s functional properties contribute to predictable performance and ease of formulation. Because modern food product development places a premium on consistent sensory experiences, ingredients that can support flavour delivery without complicating formulation or processing are valued by food scientists and technologists. In practical terms, the inclusion of choline chloride in food applications reflects a combination of functional properties, regulatory classifications, and formulation strategies aimed at achieving targeted flavour profiles. Manufacturers choose ingredients like choline chloride when they seek technical performance that aligns with processing conditions and consumer expectations for taste, aroma, and overall eating experience. While not a nutritional fortificant in this context, its role in flavour systems underscores the multifaceted considerations that guide ingredient selection in the food industry.

Safety & Regulations

FDA

  • Notes: FDA inventory listing exists but no specific CFR authorization section could be verified for food additive use.

EFSA

  • Notes: No specific EU additive designation or numeric ADI verified.

JECFA

  • Notes: JECFA concluded no safety concern but did not establish a numeric ADI on the d evaluation.
  • Adi Display: No safety concern at current intake levels when used as a flavouring agent

Sources

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