CHOLINE CHLORIDE

CAS: 67-48-1 NUTRIENT SUPPLEMENT

Choline chloride is a widely used nutrient supplement and additive with CAS number 67-48-1. It serves primarily to provide choline, an essential nutrient precursor, and is included in regulatory frameworks for safe use in food when applied within good manufacturing practice.

What It Is

Choline chloride is a chemical compound recognized for its role as a nutrient supplement in food and feed applications. It is the chloride salt of choline, a quaternary ammonium compound important in biological systems for cell membrane structure and function. The compound is identified by the CAS number 67-48-1 and is often listed under regulatory code 182.8252 in the United States. It is included in international evaluations and specifications related to its functional use and safety profile. When used, choline chloride is intended to supply choline, which acts as a nutrient precursor in various biological processes. Its other names reflect its chemical structure, including descriptions such as (2-hydroxyethyl)trimethylammonium chloride and 2-hydroxy-N,N,N-trimethyl-ethanaminium chloride. This compound is commonly encountered in crystalline form and can be integrated into food formulations primarily for its nutritional properties rather than as a flavouring or preservative.

How It Is Made

Industrial production of choline chloride generally involves the chemical synthesis of choline derivatives from precursor molecules, where trimethylamine is reacted with ethylene oxide to form the choline cation, which is subsequently neutralized with hydrochloric acid to yield the chloride salt. The process results in a hygroscopic crystalline solid that can be further refined to meet food or feed grade specifications. Purity requirements and quality control in production are guided by regulatory and industry standards to ensure that the final product is suitable for use in intended applications. Manufacturers responsible for producing choline chloride typically adhere to good manufacturing practices that include monitoring moisture content, controlling impurities, and verifying identity through analytical testing. Although the specifics of manufacturing processes vary by supplier, the overarching principle is to produce a stable, high-purity nutrient additive that complies with food safety expectations where applicable.

Why It Is Used In Food

Choline chloride is incorporated into food and feed products because it serves as a source of the nutrient choline. Choline is recognized as a vital compound for metabolic pathways and structural components of cell membranes, and supplemental choline via choline chloride helps ensure that dietary formulations provide sufficient levels for nutritional needs. In human food applications, choline chloride may appear in dietary supplements or fortified foods to address choline requirements in populations with increased demand or suboptimal dietary intake. Its inclusion is motivated by the need for consistent and measurable delivery of choline in products where natural levels might not meet intended nutritional goals. Use of choline chloride in formulations is also based on its compatibility with other ingredients and its ability to dissolve readily, allowing formulators to target precise nutrient levels. While many foods naturally contain choline, the addition of choline chloride permits manufacturers to enhance the choline content of food products in a controlled manner.

Adi Example Calculation

To illustrate the concept of Acceptable Daily Intake (ADI) in a practical way, consider a hypothetical scenario where a regulatory body establishes an ADI for a nutrient supplement like choline (expressed for nutrient context rather than a strict safety threshold). For instance, if an ADI-like guidance value were described as the amount unlikely to present risk over a lifetime, one could calculate potential intake based on body weight. In this hypothetical case, a 70 kg adult might be assessed with a guidance framework that suggests a certain milligram intake per kilogram body weight. Dividing total intake by body weight provides a sense of daily allowance relative to individual characteristics. It is crucial to recognize that this calculation is illustrative and not a personalized recommendation. Actual intake considerations depend on dietary patterns, nutritional needs, and regulatory advice specific to choline. This example underscores how ADI concepts help frame nutrient exposure relative to body size, providing a reference point for formulators and regulators.

Safety And Health Research

Safety reviews of choline chloride have considered its toxicological profile, metabolic fate, and long-standing use in animal nutrition and human supplements. Animal studies and historical exposure data indicate that choline chloride has low toxicity at levels encountered through dietary use, consistent with its role as a nutrient precursor. Evaluations by scientific committees, such as those convened by international regulatory bodies, have reviewed available data to determine whether typical intake levels pose safety concerns, generally finding no evidence of appreciable risk under conditions of use. Research into potential hazards often focuses on endpoints such as developmental toxicity, mutagenicity, and systemic effects, with outcomes supporting the compound’s qualification for use as a nutrient additive. It is important to emphasize that findings from experimental studies are interpreted in the context of realistic dietary exposure, and regulatory assessments reflect conservative approaches to ensure safety. Emerging research continues to investigate nuances of choline metabolism and requirements in various populations, but existing evaluations support the established use of choline chloride within regulatory frameworks.

Regulatory Status Worldwide

In the United States, choline chloride is listed under 21 CFR 182.8252, where it is recognized as a substance that is generally recognized as safe (GRAS) when used in accordance with good manufacturing practice. This regulatory citation indicates that choline chloride has undergone evaluation and is permitted as a nutrient supplement under specified conditions of use in food formulations. The inclusion in this regulation reflects consensus on its safety for intended food uses without the need for a food additive petition. In international contexts, choline chloride has also been evaluated by the Joint FAO/WHO Expert Committee on Food Additives (JECFA), with assessments indicating no safety concern at current intake levels in the contexts examined. Global regulatory frameworks differ in how they classify and permit choline chloride, but the emphasis in many jurisdictions is on its role as a nutritional additive or feed nutrient rather than a traditional flavouring or preservative. Where applicable, compliance with specific standards ensures that choline chloride meets criteria for identity, purity, and intended use in food or feed products.

Taste And Functional Properties

Choline chloride in its pure form is a crystalline compound that is generally characterized by limited sensory impact when used at nutrient-level concentrations. It is water-soluble, allowing it to disperse readily in aqueous environments during food processing. The compound does not impart strong flavour characteristics at levels typical of nutrient supplementation, although at very high concentrations it can contribute a slight, neutral to mildly bitter note. Functionally, its primary role is as a nutrient source rather than a flavouring agent. Its stability in food systems depends on processing conditions, with adequate stability under typical pH and temperature ranges encountered in fortified foods. Choline chloride’s solubility makes it suitable for inclusion in beverages, bars, dietary supplements, and dry mix formulations. Formulators consider its physicochemical properties in conjunction with the intended nutritional profile, ensuring that the compound delivers choline effectively without adversely affecting product taste or textural attributes.

Acceptable Daily Intake Explained

Acceptable Daily Intake (ADI) represents an estimate of the amount of a substance that can be consumed daily over a lifetime without appreciable risk. For compounds like choline chloride, which serve as nutrient supplements, ADIs or guidance on safe intake are informed by considerations of both safety and nutritional requirements. In the case of choline, adequate intake levels have been established in some jurisdictions to help define target intake rather than a safety limit, reflecting the nutrient’s essential role. It is important to understand that ADI values are not recommended intake levels but rather thresholds that regulatory bodies use to assess whether typical consumption patterns are within safe bounds. When choline chloride is used in food formulations, manufacturers and regulators consider factors such as the nutrient’s bioavailability, population-wide intake, and the contribution from all dietary sources. This ensures that additional choline provided through fortified foods does not exceed levels that would raise concern based on scientific evidence.

Comparison With Similar Additives

Choline chloride shares functional similarities with other nutrient supplements that deliver essential compounds, such as choline bitartrate or phosphatidylcholine. Compared to choline bitartrate, choline chloride is often more water-soluble, making it suitable for use in aqueous formulations where rapid dissolution is important. Phosphatidylcholine, another choline source, may provide additional phospholipid components but may differ in solubility and application context. Each choline-containing additive has distinct physicochemical properties that influence its use in food and feed. Formulators select among these based on desired delivery form, solubility, and compatibility with other ingredients. While all these additives aim to supply choline, differences in functional behaviour highlight the range of options available to achieve specific nutritional and product development goals.

Common Food Applications Narrative

Choline chloride finds application in a range of products where choline enrichment or supplementation is desired. In fortified beverages, nutritional drinks, and ready-to-drink formulations, choline chloride provides a soluble source of choline that can support nutrient labeling claims. In powdered mixes and meal replacements, it serves to elevate the choline content without significant impact on flavour or texture, helping producers meet consumer expectations for nutrient-rich products. Dietary supplements, including capsules and tablets, frequently list choline chloride as a key ingredient to help users achieve targeted choline intake. Additionally, some specialised food products focused on cognitive health, prenatal nutrition, and general wellness may include choline chloride as part of a broader micronutrient blend. Across these applications, the compound’s inclusion aligns with consumer interest in nutrients associated with cell function and metabolic support. It is important to note that the use of choline chloride in mainstream foods is primarily driven by nutritional considerations rather than technological functions such as preservation or emulsification.

Safety & Regulations

FDA

  • Approved: True
  • Regulation: 21 CFR 182.8252

EFSA

  • Notes: EFSA has assessed choline chloride as a feed additive but not assigned an E-number for food additive use

JECFA

  • Year: 2010
  • Adi Display: No safety concern at current intake levels

Sources

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