MAGNESIUM CYCLAMATE--PROHIBITED
Magnesium cyclamate is a magnesium salt of cyclohexane sulfamic acid listed by the U.S. FDA among substances prohibited from direct addition or use in human food under 21 CFR 189.135.
What It Is
Magnesium cyclamate is a synthetic non-nutritive sweetener described as a magnesium salt of cyclohexane sulfamic acid. It belongs to the cyclamate class of compounds, which are intense sweetening agents related chemically to cyclamic acid. Magnesium cyclamate itself, like other cyclamate salts, has been historically used for its sweetening properties in research and industrial contexts, even though its direct use in food products has been formally prohibited in some jurisdictions, such as the United States under federal food additive regulations. In regulatory inventories maintained by authoritative food safety agencies, magnesium cyclamate appears with a CAS number of 7757-85-9 and is identified as a non-nutritive sweetener that is not permitted for direct addition to human foods. The term "non-nutritive" refers to its high intensity of sweet taste relative to sucrose while contributing negligible caloric energy when considered in theoretical technological applications. Its structural cousins, such as sodium cyclamate and calcium cyclamate, are more widely discussed in food additive evaluations globally, but all these salts share a common core of cyclohexane sulfamic acid chemistry. The identification of magnesium cyclamate in regulatory lists reflects its classification within the broader chemical class of cyclamates rather than its widespread use in modern commercial foods. Other names for this compound include magnesium cyclamate, magnesium cyclohexylsulfamate, and various systematic chemical descriptors reflecting its salt form and stoichiometry. Its status as a prohibited additive in specified jurisdictions influences its recognition in food safety databases and inventories.
How It Is Made
The chemical synthesis of magnesium cyclamate, like other cyclamate salts, involves the generation of cyclamic acid (cyclohexane sulfamic acid) followed by neutralization with a magnesium base. In practice, cyclamic acid can be produced synthetically by sulfonation of cyclohexylamine derivatives under controlled conditions, yielding the sulfamic acid functional group attached to the cyclohexane ring. This intermediate compound is then reacted with magnesium hydroxide or another magnesium-containing base to form the magnesium salt in a specified stoichiometric ratio. Industrial chemical suppliers producing magnesium cyclamate typically process reactants under conditions designed to maximize purity and control residual reagents. The outcome of such manufacturing is a crystalline powder form of magnesium cyclamate that can be characterized by analytical chemistry techniques (such as spectrometry or chromatography) to ensure identity and absence of major contaminants. Although general chemical suppliers may list magnesium cyclamate and provide specifications for laboratory use, these descriptions are separate from food regulatory approval and do not imply permitted food applications. Because magnesium cyclamate is not approved for direct food use in certain regions, its manufacturing is primarily relevant to chemical research, analytical standards, and industrial chemical inventories rather than food production. Reputable suppliers provide material safety data and information on chemical handling, but the context of this substance remains outside authorized food additive processes where safety evaluations for consumption would apply.
Why It Is Used In Food
Magnesium cyclamate and other cyclamate salts are classified as non-nutritive sweeteners, meaning they provide a sweet taste at intensities much higher than table sugar (sucrose) with minimal caloric contribution. Theoretical use in food formulations arises from this intense sweetness property, which is valuable in products intended to be low-calorie or sugar-reduced. Historically, cyclamate salts were studied and used in combination with other sweeteners to improve sweetness profiles and reduce undesirable tastes associated with single sweeteners. In jurisdictions where cyclamates were authorized, these compounds served as alternatives to nutritive sugars in beverages, desserts, confectionery, and tabletop sweetener blends. The sweetening effect of cyclamates is relatively stable under typical food processing conditions such as heat and acidic pH, which made them attractive as technological tools for product developers seeking sugar reduction. Their ability to blend with other high-intensity sweeteners sometimes provided more balanced sweetness with fewer off-notes. That said, magnesium cyclamate in particular does not have widespread permitted applications in food products owing to regulatory prohibitions in major markets such as the United States. As such, references to why cyclamates are used in food generally pertain to the class as a whole rather than magnesium cyclamate specifically. The broad rationale remains the same: to achieve high-intensity sweetness without adding significant caloric value, which aligns with consumer demand for reduced-sugar products in many parts of the world.
Adi Example Calculation
To illustrate how an Acceptable Daily Intake (ADI) might be used for regulatory context (not for individual guidance), consider a theoretical ADI value established for cyclamate salts by competent food authorities in jurisdictions that permit their use. If an ADI were set at 7 mg per kilogram of body weight per day (as is commonly associated with the broader cyclamate class under certain regional approvals), an adult weighing 70 kg would theoretically have a lifetime exposure threshold calculated as approximately 490 mg of cyclamate per day without exceeding the ADI. That calculation is performed by multiplying the ADI value by the body weight (7 mg/kg bw times 70 kg equals 490 mg). It is crucial to emphasize that this calculation is illustrative and does not imply that magnesium cyclamate is approved for use in any particular food product or that individuals should aim to consume this amount. ADI values are established by regulatory panels based on toxicological datasets and built-in safety factors to ensure a wide margin of protection. Furthermore, ADIs may differ between jurisdictions, and the use of additives in foods is governed by local regulatory permissions and limits. This example serves to demonstrate how ADI values can be used by regulators and risk assessors in exposure assessments and in setting maximum use levels for authorized food additives. The numerical example is provided in the context of broader safety assessment concepts and not as advice or recommendation for consumption.
Safety And Health Research
Regulatory assessments of cyclamate compounds, including magnesium cyclamate by extension of the cyclamate class, focus on evaluations of toxicological endpoints such as carcinogenicity, metabolism, and general toxicology rather than routine nutritional effects. The historical context for regulation in some jurisdictions stems from studies conducted in the mid-20th century that explored potential associations between cyclamate use and health outcomes in animals, leading to precautionary regulatory decisions. In the United States, for instance, the prohibition of cyclamates in food additives traces back to scientific evidence available at that time that raised questions about safety. Subsequently, food safety authorities in other regions have conducted their own evaluations of cyclamates, often resulting in established acceptable daily intakes (ADIs) and permitted use conditions under local food additive regulations. These evaluations consider multiple lines of toxicological evidence, including chronic toxicity studies, metabolic fate, and exposure assessments. Because regulatory bodies periodically review the scientific literature and update their assessments, the status of cyclamate sweeteners continues to be subject to evaluation in jurisdictions that authorize their use. The ongoing review of sweeteners by authorities such as those responsible for European food additive regulation exemplifies this approach to continuous safety assessment. Collectively, the safety and health research context for magnesium cyclamate is embedded within broader evaluations of cyclamate sweeteners, where differing conclusions across regions reflect the distinct methodologies and data considered by national and international regulatory and scientific bodies.
Regulatory Status Worldwide
Magnesium cyclamate is listed by the United States Food and Drug Administration (FDA) among substances that are prohibited from direct addition or use in human food under U.S. federal regulations at 21 CFR 189.135, which covers cyclamate and its derivatives, including magnesium, sodium, calcium and potassium salts of cyclohexane sulfamic acid. This regulation states that food containing any added or detectable level of these cyclamate compounds is deemed adulterated and prohibited, reflecting a long-standing regulatory decision that dates back to an order published in the Federal Register in 1969. This prohibition does not distinguish between different cyclamate salts for direct food use within this U.S. context. In contrast, regulatory frameworks in other parts of the world have historically treated cyclamate compounds as authorized food additives under specific codes and conditions. For example, the cyclamate family of sweeteners has been assigned an "E" number (E952) in the European Union where it has been permitted in defined food categories and subject to safety evaluations by competent authorities. Although the regulatory review of sweeteners including cyclamates is ongoing in the EU, the existence of an E number reflects that cyclamates have been used in certain jurisdictions with established maximum use levels and safety evaluations by regional food safety bodies. These differing regulatory statuses illustrate the divergence in approaches to cyclamate sweeteners, with some countries maintaining authorization with specified conditions and others, such as the United States, maintaining prohibitions on their use in food products.
Taste And Functional Properties
Magnesium cyclamate, as a member of the cyclamate class, shares the general sensory profile associated with cyclamate salts: an intensely sweet taste significantly stronger than sucrose. Cyclamates are often described as having a clean sweet quality when compared to some other intense sweeteners, although individual perceptions can vary. This very high level of sweetness per unit mass is why such compounds are categorized as high-potency or intense sweeteners. Functionally, cyclamate salts are typically soluble in water, which enables their incorporation into aqueous food systems such as beverages and syrups (in jurisdictions where use is permitted). They also exhibit relative stability to heat and a range of pH conditions encountered in food processing, which can be important for maintaining sweetness through manufacturing and shelf life. However, magnesium salts can have different solubility and hygroscopic properties compared to other cyclamate salts, which may influence formulation choices in theoretical applications. Despite these functional attributes, magnesium cyclamate’s practical use in food products is constrained by regulatory status in some regions. Its sensory and physical properties are often discussed in the context of the broader cyclamate family rather than this specific salt, but those general properties help explain why cyclamates were historically attractive for sugar replacement and product development in the food industry.
Acceptable Daily Intake Explained
An Acceptable Daily Intake (ADI) is a regulatory concept used by food safety authorities to express the amount of a given food additive that can be consumed every day over a lifetime without appreciable health risk when evaluated using the best available scientific evidence. ADIs are typically expressed as a quantity per unit of body weight (for example, milligrams per kilogram of body weight per day) and incorporate safety factors to account for uncertainties in toxicological data and differences among individuals. ADIs are not recommended consumption levels but instead serve as conservative guidance for regulatory purposes. For cyclamate sweeteners as a class, regulatory bodies outside of jurisdictions where these compounds are prohibited have established ADIs based on comprehensive toxicological studies and expert evaluations. Within these frameworks, authorities assess the available animal and human data to determine a level of exposure that is considered to be without significant risk. ADIs provide a benchmark for regulatory limits on use levels in foods and for exposure assessment by public health agencies. The concept of an ADI underscores that safety evaluations for food additives are risk-based, combining hazard identification with exposure assessment. It is important to recognize that ADIs apply to the specific additive and its authorized contexts of use and may differ across regions depending on local evaluations and standards. Where an additive remains prohibited in a jurisdiction, as is the case with magnesium cyclamate under certain national regulations, the ADI framework does not confer authorization for use in foods but may still be referenced in international scientific discussions about safety assessments.
Comparison With Similar Additives
Magnesium cyclamate belongs to the broader class of cyclamate sweeteners that includes sodium cyclamate and calcium cyclamate. These additives are considered high-potency or intense sweeteners because of their ability to provide substantially more sweetness per unit mass than traditional sugars such as sucrose. Among the cyclamates, differences in solubility and formulation properties can influence their selection in food systems where they are permitted, with sodium cyclamate historically being more commonly discussed due to its solubility characteristics. When compared with other non-nutritive sweeteners such as saccharin (often assigned E954 under European food additive codes) or aspartame (E951), cyclamates generally have a different sweetness profile and may be described as having a milder sweet taste with fewer off-notes when compared in certain food matrices. Blends of cyclamates with other sweeteners were historically used to balance taste and improve overall sensory acceptance. The heat stability of cyclamates has also influenced their consideration in applications where processing temperatures might degrade some sweeteners. Other intense sweeteners, such as sucralose or acesulfame K, differ in their chemical structures and metabolic fates and are subject to separate regulatory evaluations and authorized use conditions. The selection among these alternatives in food formulations reflects both sensory preferences and regulatory status in specific markets. Because magnesium cyclamate is prohibited in some jurisdictions, its comparison to these other sweeteners highlights differences in regulatory acceptance and practical use rather than inherent sweetness or functional properties alone.
Common Food Applications Narrative
In food formulation contexts, intense sweeteners like cyclamates have historically been considered for a variety of reduced sugar and diet products. This includes beverages marketed to have lower caloric content, sugar-reduced confectionery such as candies and chewing gums, tabletop sweeteners intended for home use, and a range of dietetic products where sweetness is desired without the energy contribution of sugar. The property of high sweetness intensity with minimal caloric contribution made cyclamate salts part of early efforts to reduce sugar use in foods and beverages. In some markets outside the United States, cyclamate sweeteners have been authorized under food additive codes (such as E952 in the European Union) and included in specific food categories with defined maximum use levels. Within these permitted frameworks, cyclamate sweeteners appear in products such as sugar-free soft drinks, flavored waters, and low-calorie desserts. While magnesium cyclamate is recognized chemically as part of the broader cyclamate group, its listing in regulatory inventories as a "prohibited" substance in certain jurisdictions means that it is not commonly encountered in food ingredient lists where additives are regulated. For consumers seeking products with intense sweetening but reduced sugar content, alternative approved sweeteners (such as those authorized in local regulations) are typically used instead. These alternatives can be found in a range of foods and beverages that meet the regulatory requirements of individual markets, whereas magnesium cyclamate’s presence is limited by legal restrictions where it remains prohibited. The narrative of its application is thus closely tied to cyclamates in general and their permitted use in various parts of the world, rather than frequent inclusion in commercially available foods in prohibited regions.
Safety & Regulations
FDA
- Notes: Magnesium cyclamate is listed among cyclamate derivatives prohibited from direct addition to human food under this U.S. regulation.
- Regulation: 21 CFR 189.135
EFSA
- Notes: Cyclamate sweeteners (E952) are evaluated by EFSA, but specific values for magnesium cyclamate alone were not sourced.
JECFA
- Notes: No specific JECFA entry for magnesium cyclamate was found; cyclamate class assessments exist but were not directly sourced.
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