CYCLAMATE--PROHIBITED

CAS: 977016-96-8 NON-NUTRITIVE SWEETENER

Cyclamate is a non‑nutritive sweetener that is specifically listed as prohibited for use in foods under U.S. federal regulation 21 CFR 189.135. Although it and its salts are technically sweetening agents, their use in food products in the United States is not permitted and products containing detectable levels are deemed adulterated.

What It Is

Cyclamate refers to a class of synthetic sweetening agents derived from cyclohexanesulfamic acid and commonly encountered in the form of salts such as sodium cyclamate or calcium cyclamate. These compounds are categorized as non‑nutritive sweeteners because they provide a sweet taste at very low concentrations without contributing significant energy or calories, and they have been historically used to replace sugar in food formulations where reducing energy content is desirable. In regulatory nomenclature, additive codes like "E952" are often used in jurisdictions where cyclamate is permitted, although in the United States the specific designation "CYCLAMATE--PROHIBITED" and the code 977016‑96‑8 identify the substance as banned under Title 21, Code of Federal Regulations, Section 189.135, meaning it is prohibited from use in foods marketed in the U.S. regulatory system. US regulators describe cyclamates as synthetic chemicals that are not naturally present in foods and have sweetening potency many times greater than that of sucrose.

How It Is Made

The production of cyclamate sweeteners, in general terms, involves organic synthesis routes that convert precursor chemicals into the cyclohexylsulfamate structure. The basic chemical process typically begins with cyclohexylamine undergoing sulfonation to introduce a sulfamic acid moiety, which is then neutralized with salts such as sodium or calcium to form sodium cyclamate or calcium cyclamate. Industrial practices emphasize purity and control of reaction conditions to yield crystalline powders with consistent sweetness and physicochemical properties. In jurisdictions where its use is permitted, manufacturers adhere to food additive specifications that govern identity, purity, and limits for certain impurities to ensure that the material used in formulations meets safety and quality standards. Because cyclamate itself is not absorbed completely in the human gut and can be partly metabolized by intestinal microbiota into other compounds, regulatory authorities have historically scrutinized manufacturing and specification data as part of comprehensive safety evaluations.

Why It Is Used In Food

Non‑nutritive sweeteners like cyclamate are used in food formulation to provide sweetness without adding calories, which addresses both consumer demand for low‑calorie products and industry goals for energy‑reduced formulations. The sweetening strength of cyclamate is substantially higher than that of sucrose on a per‑weight basis, meaning relatively small amounts can achieve a target sweetness without altering the bulk properties of a product. Additionally, cyclamate exhibits stability over a range of pH levels and processing conditions, allowing it to be incorporated into products subjected to heating, freezing, or extended storage. In composite sweetener systems, cyclamate has been used synergistically with other sweeteners to improve the overall taste profile by balancing aftertastes that may be present with a single sweetener type. Although regulatory status varies globally, in markets where it is authorized, cyclamate has served as a tool for product developers to meet formulation targets such as reduced sugar content while maintaining consumer‑acceptable sensory characteristics.

Adi Example Calculation

To illustrate how an acceptable daily intake (ADI) might be interpreted, consider a hypothetical ADI of 11 mg per kilogram of body weight per day established for cyclamate by an expert committee. For an individual weighing 70 kilograms, the ADI would be calculated by multiplying the body weight by the ADI value, yielding 770 mg per day as the amount that could be consumed daily without exceeding the guidance value. It is important to emphasize that this example is illustrative and does not imply any specific dietary recommendation or imply that such intake levels are typical or advisable; actual exposure from foods will depend on the concentration of the sweetener in products and an individual’s consumption patterns.

Safety And Health Research

Safety evaluations of cyclamate have historically focused on toxicological endpoints such as carcinogenicity, reproductive effects, and metabolic fate. Regulators have reviewed animal studies, genetic toxicity tests, and metabolic data to assess potential health risks associated with chronic exposure. Some early rodent studies reported findings that raised concerns about tumor incidence at very high doses in combination with other sweeteners, which contributed to regulatory decisions such as the prohibition in certain jurisdictions. Subsequent evaluations by expert committees have considered broader data sets, including studies in multiple species and mechanistic data on absorption and metabolism. International assessments, such as those conducted by JECFA, provide context for safety evaluations that inform acceptable intake guidelines and risk management decisions. Scientific review processes recognize uncertainties in extrapolating high‑dose animal data to human exposure scenarios and emphasize margins of safety to account for interspecies differences and variability within human populations.

Regulatory Status Worldwide

The regulatory landscape for cyclamate has varied significantly across jurisdictions and over time. In the United States, cyclamate and its salts are specifically prohibited from use in food and food products, and any food containing added or detectable cyclamate is deemed adulterated under federal regulation 21 CFR 189.135, which reflects the longstanding ban dating back to regulatory decisions made in the late 1960s and early 1970s. In contrast, many other countries and regional bodies have evaluated the available toxicological and safety data and have authorized the use of cyclamate within defined limits and conditions. For example, in the European Union, cyclamate is assigned the E number E952 and is permitted for use in specified categories of food and beverages, subject to maximum permitted levels and labeling requirements. International scientific authorities such as the Joint FAO/WHO Expert Committee on Food Additives (JECFA) have assessed data on cyclamate and set guidance values for acceptable daily intake that inform regulatory decisions in many member countries. Regulatory approaches continue to evolve, with periodic re‑evaluations and adjustments to conditions of use based on emerging evidence and risk assessments.

Taste And Functional Properties

Cyclamate sweeteners are characterized by an intensely sweet taste that is perceived as cleaner and less metallic than some other early artificial sweeteners. Depending on the specific salt form and the food matrix in which it is used, cyclamate can exhibit sweetness potency many times that of sucrose, meaning minute concentrations can confer substantial sweetness. Functional properties of cyclamate include good solubility in water, relative stability under a range of pH conditions, and the ability to withstand heat treatment, which makes it suitable for a variety of applications where sustained sweetness during processing is required. Sensory scientists recognize that cyclamate alone can have a slightly different onset and sweetness profile compared with sugar, and when used in combination with other sweeteners, it can help reduce aftertastes or bitterness associated with single sweeteners. The overall performance of cyclamate in a given product depends on formulation context, including interactions with other ingredients and processing conditions.

Acceptable Daily Intake Explained

An acceptable daily intake (ADI) is a health‑based guidance value that represents the amount of a substance that can be consumed daily over a lifetime without appreciable risk, as determined by expert risk assessors. ADIs are derived from toxicological studies by identifying a no‑observed‑adverse‑effect level (NOAEL) or similar point of departure in animal studies and applying uncertainty factors to account for interspecies differences and human variability. An ADI does not constitute a recommended intake level but rather a conservative benchmark used in regulatory risk management. For cyclamate, international expert bodies have evaluated the available data and established guidance values expressing safe exposure levels. These values are used by regulators and risk managers around the world to inform conditions of use and to help ensure that typical consumption patterns in populations remain below levels associated with potential health risks.

Comparison With Similar Additives

Cyclamate is one of several non‑nutritive sweeteners used to provide sweetness without the caloric content of sugar. Other additives such as saccharin, aspartame, and sucralose serve similar technological functions in food products. Saccharin, for example, is another intense sweetener that has been widely evaluated and, in many jurisdictions, remains authorized for use; formulators sometimes blend cyclamate with saccharin to balance taste profiles. Aspartame, a dipeptide methyl ester, is much sweeter than sucrose and is commonly used where clean sweetness is desired, although it is less stable to heat compared to some other sweeteners. Sucralose is a chlorinated sucrose derivative that is heat‑stable and broadly used in baked products. Each of these sweeteners has distinct sensory, functional, and regulatory profiles that influence product development choices and regulatory acceptance across markets.

Common Food Applications Narrative

Across regions where cyclamate has been authorized for use, it has been incorporated into many types of low‑calorie and sugar‑reduced foods to deliver sweetness without the caloric load associated with sugar. Typical application categories in such markets have included reduced‑calorie soft drinks and beverages formulated for weight management or energy reduction, sugar‑free chewing gums where long‑lasting sweetness enhances consumer experience, tabletop sweeteners that allow consumers to sweeten beverages at home without added calories, and low‑sugar desserts where texture and palatability are important. In confectionery, cyclamate has been used to sweeten sugar‑free candies and lozenges, while in dairy products, it has been employed in diet yogurts or milk‑based beverages. Processed fruits and jellies formulated for energy reduction have also used intense sweeteners like cyclamate, alone or in blends. It is important to note that because of regulatory prohibitions in certain jurisdictions such as the United States, products in those regions would not list cyclamate on ingredient labels, and the presence of detectable levels could render the food adulterated under local law.

Safety & Regulations

FDA

  • Notes: Cyclamate and its salts are prohibited in foods in the United States under this regulation.
  • Regulation: 21 CFR 189.135

EFSA

  • Notes: EFSA authorizes cyclamate as E952; specific numeric ADI not taken directly from the d EFSA topic page.
  • Approved: True
  • E Number: E952

JECFA

  • Year: 1982
  • Notes: Based on JECFA evaluation records indicating an acceptable daily intake range.
  • Ins Number: 952
  • Adi Display: 0-11 mg per kg body weight
  • Adi Mg Per Kg: 11

Sources

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