POTASSIUM N-METHYLDITHIOCARBAMATE
Potassium N-Methyldithiocarbamate is a chemical antimicrobial agent identified by CAS 137-41-7 that is referenced in several FDA food contact substance regulations for specified conditions of use.
What It Is
Potassium N-Methyldithiocarbamate is a synthetic chemical compound used for its antimicrobial properties and identified by the Chemical Abstracts Service (CAS) number 137-41-7. It belongs to a class of dithiocarbamate salts known for their ability to inhibit or control microbial growth. The compound appears in regulatory inventories for indirect food additives in specific sections of the United States Code of Federal Regulations, indicating authorized technical uses under defined conditions. Other names and synonyms for this compound reflect its chemical structure and salt form. In laboratory and industrial contexts it is often encountered as an aqueous solution and may be described by additional technical terms that reference its carbamodithioic acid salt form. As an antimicrobial agent it is applied in situations where control of microorganisms is needed to support processing or preservation steps rather than as a direct ingredient intended to alter flavor or nutritional character. This technical identity distinguishes it from direct food additives used for nutrition or sensory effects. Because of its specialized use and regulatory listings for indirect applications, Potassium N-Methyldithiocarbamate is recognized in food safety frameworks primarily for its functional role in controlling microbial contamination in processing environments rather than as a food ingredient per se.
How It Is Made
The production of Potassium N-Methyldithiocarbamate typically involves chemical synthesis pathways common to dithiocarbamate salts, where precursor organic amines are reacted with carbon disulfide under controlled alkaline conditions followed by neutralization with potassium sources. The resulting salt is isolated and purified to meet technical grade specifications required for its antimicrobial applications. Industrial facilities producing dithiocarbamate compounds follow standard chemical manufacturing practices, including containment, temperature control, and purification steps to ensure the product meets consistency and quality criteria for use. The synthesis process may generate byproducts and requires careful handling due to potential hazards associated with intermediate chemicals, such as carbon disulfide. Manufacturers often provide material safety data sheets that outline recommended handling procedures and the known stability profiles of the compound. In solution, the chemical may slowly decompose and requires appropriate storage conditions to maintain stability and to ensure safe handling in downstream applications.
Why It Is Used In Food
Potassium N-Methyldithiocarbamate is listed in the U.S. Code of Federal Regulations for specific indirect food additive uses, which indicates that under prescribed conditions it may be employed in food processing environments where antimicrobial activity is needed. These regulatory listings allow the compound to be used to control microorganisms during processes such as cane-sugar and beet-sugar milling and in components of adhesives or paper and paperboard that may contact food. The compound’s antimicrobial properties help manage spoilage organisms or biofilms that could otherwise compromise product quality or safety in food processing settings. Its inclusion in regulatory inventories reflects a determination that, when used in compliance with the specific sections d in the regulations, the substance can perform its technical function without creating unsafe residues in food. Such uses are indirect in nature, meaning the compound is not intended to remain in the finished food but rather to support hygienic processing conditions or to act in food-contact materials that do not transfer significant amounts of the substance into food. This functional designation underscores why it appears in regulatory lists for specific processing aids or materials rather than as a direct food additive ingredient.
Adi Example Calculation
Because a formal ADI for Potassium N-Methyldithiocarbamate has not been established in authoritative food additive databases, an example calculation using a numeric ADI cannot be provided with confidence. In the context of food contact substances, exposures are managed by regulatory conditions that limit migration into food rather than by setting an ADI. For additives with established ADIs, illustrative calculations might involve multiplying the ADI by a hypothetical body weight to estimate a maximum safe intake. For example, if an ADI were established at X mg per kg body weight, a person weighing Y kg would have a theoretical safe daily intake of X times Y mg per day. In the absence of an established numeric ADI for this compound, such a calculation is not directly applicable.
Safety And Health Research
Safety evaluations for substances used in food processing or contact materials focus on ensuring that their use does not lead to unsafe residues in food or pose risks to consumers when used as intended. For Potassium N-Methyldithiocarbamate, its listing in U.S. regulatory inventories for indirect uses suggests that the compound has been assessed for those specific applications, but comprehensive toxicological data relevant to direct dietary exposure are not evident in the available public documentation. Regulatory frameworks for antimicrobial agents generally consider factors such as potential toxicity, how the substance interacts with microbial cells, and whether residues could migrate into food at levels that might pose human health concerns. For direct food additives, extensive toxicological data including genotoxicity, repeated-dose toxicity, and other endpoints would be part of an evaluation, but for indirect substances the focus often centers on ensuring that migration into food remains negligible. In the absence of publicly available detailed toxicology evaluations in food additive databases or international committees, a cautious approach is appropriate when discussing safety. Regulatory listings themselves do not imply broad approval for all uses; rather they specify the conditions under which the compound can be used in processing or contact materials while controlling for potential health risks.
Regulatory Status Worldwide
Potassium N-Methyldithiocarbamate is listed in the U.S. Food and Drug Administration’s inventory of indirect food additives with specific references to sections of the Code of Federal Regulations that authorize its use under defined conditions. These sections include provisions for controlling microorganisms in sugar mills and for use in components of adhesives or paper and paperboard that contact food, indicating that the compound may be used in accordance with those regulatory specifications. The mere presence in such inventories reflects regulatory recognition of its technical function for specific uses rather than broad approval as a direct food additive. Beyond the United States, public regulatory listings for Potassium N-Methyldithiocarbamate as a food-related additive are not readily found in published international food additive databases, and authoritative evaluations by bodies such as the European Food Safety Authority or the Joint FAO/WHO Expert Committee on Food Additives (JECFA) do not appear to be established for this compound in the context of food additive safety. As such, its regulatory status outside the U.S. may be limited or governed by different frameworks that consider indirect food contact substances and processing aids on a case-by-case basis. Regulators require that any use of antimicrobial agents in food or food contact materials be supported by data demonstrating safety when used as intended, and requirements vary by jurisdiction. In the U.S. context, compliance with the specified regulatory sections is key to lawful use under those conditions.
Taste And Functional Properties
Potassium N-Methyldithiocarbamate is not typically evaluated for taste or sensory properties because it is not used as a direct flavoring or sensory additive in food. Its functional attributes relate to its antimicrobial activity, which helps control microbial populations in processing environments or in food-contact materials. Like many dithiocarbamate salts, it may have characteristics that influence solubility and stability in aqueous environments; these factors are relevant when formulating solutions for sanitation, slime control, or microbial inhibition during processing steps. Its solubility and behavior in water or process fluids determine how it can be applied effectively to achieve the intended antimicrobial effect. Because it is not intended to be consumed directly, sensory descriptors such as taste or aroma are not central to its functional profile in food applications. Instead, its value lies in its chemistry that interacts with microbial cell structures, helping to limit contamination under defined processing conditions.
Acceptable Daily Intake Explained
An Acceptable Daily Intake (ADI) is a measure used by food safety authorities to describe a level of daily exposure that is considered safe over a lifetime. It is typically expressed in milligrams of a substance per kilogram of body weight per day and is derived from toxicological studies with safety factors applied to account for uncertainties. For compounds like Potassium N-Methyldithiocarbamate that are listed for indirect food contact uses, a formal ADI has not been established in publicly accessible food additive databases, and detailed toxicological evaluations suitable for deriving an ADI are not readily available. In such cases, regulators focus on limiting exposure by setting usage conditions that minimize migration into food, instead of assigning a numeric ADI. Where ADIs are established for other food additives, they help risk managers determine safe exposure levels by considering the toxicology data and applying conservative safety factors to account for variability between individuals and uncertainties in the data. In contrast, indirect-contact regulatory listings emphasize adherence to specified conditions to ensure consumer exposure remains negligible.
Comparison With Similar Additives
Potassium N-Methyldithiocarbamate belongs to a class of antimicrobial agents used in specific processing contexts. Similar compounds with antimicrobial functions in food-related applications include other dithiocarbamate salts and processing aids that help control microbial growth on equipment surfaces or within processing fluids. For instance, some sulfur-containing salts are applied to mill systems or similar environments to manage microbial contamination, while other antimicrobial agents like ethyl lauroyl arginate are evaluated and approved for specified direct food uses with established ADIs. The latter are subject to more extensive toxicological review because they are expected to remain in foods at defined levels. In contrast, indirect-use antimicrobials like Potassium N-Methyldithiocarbamate are governed by regulatory conditions that control their use to situations where migration into food is limited, underscoring a key difference in how these classes of compounds are regulated and assessed for food safety.
Common Food Applications Narrative
In food processing and manufacturing, maintaining control over microbial contamination is essential to ensuring both safety and consistent quality. Various antimicrobial agents are approved or listed for use in specified steps of processing where microbial control is necessary. Potassium N-Methyldithiocarbamate is one such agent recognized in regulatory inventories for select indirect uses under clearly defined conditions. For example, in sugar processing facilities where microorganisms can proliferate in mill equipment or fluid streams, antimicrobial compounds may be applied to manage these populations and support efficient extraction and crystallization of sugar. Similarly, certain indirect food contact materials such as adhesives or paperboard coatings can be formulated with antimicrobial agents to inhibit microbial growth on surfaces that may touch food during packaging or transport. These applications are focused on the production environment and the materials used around food, rather than on adding the compound to food itself. When used in accordance with regulatory conditions, such agents contribute to food safety by minimizing microbial hazards in equipment and contact surfaces, thereby supporting the overall integrity of the food supply chain.
Safety & Regulations
FDA
- Notes: The substance appears in several FDA indirect food additive regulations, but specific direct approval status is defined by those listed sections rather than a general additive approval; numeric values and direct approval conditions are not explicitly verified.
EFSA
- Notes: No publicly available EFSA evaluation or E number assignment was identified for this compound.
JECFA
- Notes: No JECFA evaluation with an established ADI is readily found in authoritative food additive databases.
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