21 CFR § 189.135 - Cyclamate and its derivatives.
(a) Calcium, sodium, magnesium and potassium salts of cyclohexane sulfamic acid, (C6H12NO3S)2Ca, (C6H12NO3S)Na, (C6H12NO3S)2Mg, and (C6H12NO3S)K. Cyclamates are synthetic chemicals having a sweet taste 30 to 40 times that of sucrose, are not found in natural products at levels detectable by the official methodology, and have been used as artificial sweeteners.
(b) Food containing any added or detectable level of cyclamate is deemed to be adulterated in violation of the act based upon an order published in the Federal Register of October 21, 1969 (34 FR 17063).
(c) The analytical methods used for detecting cyclamate in food are in sections 20.162-20.172 of the “Official Methods of Analysis of the Association of Official Analytical Chemists,” 13th Ed. (1980), which is incorporated by reference. Copies may be obtained from the AOAC INTERNATIONAL, 481 North Frederick Ave., suite 500, Gaithersburg, MD 20877, or may be examined at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, call 202-741-6030, or go to: http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html.