CATALASE FROM BOVINE LIVER
**Catalase from bovine liver** is an enzyme preparation derived from bovine liver that catalyzes the decomposition of hydrogen peroxide into water and oxygen. It is affirmed as generally recognized as safe (GRAS) by the United States Food and Drug Administration when used in food according to current good manufacturing practice. It has applications in food processing, particularly in dairy and cheese manufacture to remove residual hydrogen peroxide. Safety evaluations have been performed by international expert bodies including the Joint FAO/WHO Expert Committee on Food Additives. It is used as an antimicrobial agent and processing aid to enhance quality and stability of foods.
What It Is
What It Is Catalase from bovine liver is an enzyme preparation obtained from extracts of bovine liver tissue, partially purified as a liquid or powder form, with the primary catalytic activity of decomposing hydrogen peroxide (EC 1.11.1.6). Its main technical functions in food systems include acting as an antimicrobial agent by helping reduce residual hydrogen peroxide levels, acting as an enzyme that catalyzes the rapid breakdown of hydrogen peroxide into water and oxygen, and serving as a processing aid in food manufacturing contexts such as dairy processing, especially cheese production where hydrogen peroxide may be used in bleaching or sanitation steps. This enzymatic activity has been recognized in regulatory frameworks such as the U.S. Code of Federal Regulations, where catalytic activity and allowable uses are defined under specific conditions of current good manufacturing practice. The enzyme is generally sourced from animal liver and is distinguished by its protein structure that includes tetrameric subunits containing a heme cofactor, which enables its oxidative catalytic activity. Catalase from bovine liver is not a single small molecule chemical but instead a biological macromolecule, an enzyme. It differs from simple antimicrobial chemicals in that its activity depends on the intact protein structure and its specific catalytic mechanism. The CAS Registry Number 81457-95-6 uniquely identifies this specific enzyme preparation sourced from bovine liver, which may be described in regulatory listings and technical specifications. Its activity makes it valuable for technologically specified purposes within food processing rather than for direct flavor, color, or nutritive characteristics. The enzyme’s designation as an antimicrobial agent reflects its functional role impacting residual oxidative compounds rather than traditional preservative activities against microbes directly. In regulatory listings, catalase from bovine liver is affirmed as safe under conditions of current good manufacturing practice, meaning the use levels and conditions of application are determined based on practical technological necessity rather than fixed numerical limits. This framework acknowledges the enzyme’s specificity and the need to control hydrogen peroxide while ensuring that residual activity does not pose safety concerns. The enzyme’s identity and functional classification are consistent with its widespread biochemical role in biological systems, where catalase plays a critical role in mitigating oxidative stress by eliminating hydrogen peroxide generated in metabolic processes.
How It Is Made
How It Is Made Catalase from bovine liver is produced through a series of extraction and purification steps starting with raw bovine liver tissue. The animal liver tissue is homogenized and extracted in aqueous buffers to release intracellular enzymes, including catalase. Following extraction, the crude extract undergoes clarification to remove cellular debris and most non-enzyme components. Partial purification is achieved through techniques such as precipitation, filtration, and chromatographic methods that separate proteins based on size, charge, or affinity. These steps concentrate catalase while reducing impurities that might affect food processing or regulatory acceptance. The final enzyme preparation may be formulated as a liquid suspension or as a dried powder, depending on the intended industrial application. Processing conditions are optimized to maintain the structural integrity and catalytic activity of catalase while minimizing denaturation. Critical control points include temperature regulation during extraction and purification, selection of buffers to stabilize protein structure, and careful handling during concentration steps. The enzyme is typically stabilized with agents that preserve activity during storage and transportation but are compatible with food-grade specifications. Documentation of the manufacturing process, including source material traceability, extraction solvents, and purity criteria, is maintained in compliance with relevant food additive regulations. In some regulatory systems, such as the U.S. Code of Federal Regulations for direct food substances, specifications for enzyme preparations may incorporate general requirements from recognized compendia, which establish acceptable levels of purity and limits on contaminants. Enzyme preparations like catalase from bovine liver must meet defined quality standards that include activity assays to quantify the specific catalytic function, checks for residual non-target proteins, and assessments of microbial purity. The goal of manufacturing is to deliver an enzyme preparation that consistently performs its intended technological role in food processing without introducing unintended hazards or impurities. Because catalase can be denatured by extreme temperatures or pH conditions, processing and storage conditions are chosen to preserve activity until the enzyme is incorporated into food manufacturing operations. Although the complete purification to homogeneity is not always necessary or practical, the level of purity achieved must support both regulatory acceptance and reliable functional performance in the applications for which the enzyme is intended.
Why It Is Used In Food
Why It Is Used in Food Catalase from bovine liver is used in food primarily because of its ability to break down hydrogen peroxide, a compound that may be used in sanitizing equipment or treating raw materials during processing. Hydrogen peroxide can be used for microbial control on surfaces or in processing solutions, but its presence in finished products is undesirable due to potential oxidative effects. Catalase facilitates the rapid decomposition of residual hydrogen peroxide into water and oxygen, making the food matrix safer and more acceptable for further processing or consumption. This enzymatic activity serves a technological need by ensuring that oxidizing agents are removed efficiently without compromising product quality. In dairy and cheese manufacturing, catalase helps remove hydrogen peroxide residues that might otherwise interfere with starter cultures, cheese ripening processes, or sensory qualities of the final product. Hydrogen peroxide residues can adversely affect the growth of beneficial microbes or lead to off-flavors if not eliminated. By incorporating catalase at appropriate stages of processing, manufacturers can control residual oxidative compounds to support consistent product quality. Catalase’s mechanism is highly specific and occurs under mild conditions, which makes it suitable for food applications where heat-sensitive components and delicate flavors may be affected by harsh chemical treatments. The classification of catalase as a processing aid or antimicrobial agent underscores its role in modifying the processing environment rather than imparting a direct sensory impact on the food. Enzymes like catalase are valued for addressing specific technological challenges encountered during production, such as removing unwanted chemicals introduced for sanitation. Its use is guided by good manufacturing practice, meaning applications and levels should reflect the minimum necessary to achieve the intended effect with no adverse impact on food quality or safety. Because catalase’s activity is biochemical and occurs at relatively low concentrations, it aligns with regulatory frameworks that consider both function and consumer safety in determining allowable uses. Overall, catalase from bovine liver is used in food because it provides a targeted and biologically efficient solution to a processing challenge—removal of peroxide compounds—without compromising the integrity of the food matrix or the health of consumers. Its enzymatic activity adds value in manufacturing contexts where oxidative residues must be mitigated to support downstream processing, fermentation, or sensory outcomes.
Adi Example Calculation
ADI Example Calculation To illustrate how an ADI not limited designation operates in a hypothetical context, consider a food enzyme like catalase used in cheese production to remove hydrogen peroxide residues after sanitation steps. Suppose a typical residual enzymatic activity results in a negligible amount of enzyme protein remaining in the final food product—far below levels linked to safety concerns in toxicology assessments. If the total enzyme protein in a serving of cheese contributed only micrograms of protein attributable to residual catalase, the exposure would be orders of magnitude lower than any threshold associated with toxicological effects. In such a scenario, the ADI not limited designation implies that even daily consumption of multiple servings would not contribute meaningfully to enzyme exposure compared to safety margins established during expert evaluation. This example is illustrative rather than prescriptive and does not represent a recommended intake. It demonstrates how exposure estimates at typical use levels remain well within safety margins when an ADI not limited designation is applied. In regulatory practice, quantitative exposure assessments may be conducted as part of safety evaluations, but the ADI not limited designation reflects a conclusion that typical dietary exposures do not raise safety concerns.
Safety And Health Research
Safety and Health Research Safety evaluations of food enzyme preparations like catalase from bovine liver focus on ensuring that the enzyme preparation does not introduce harmful substances and that it performs its intended technological function without adverse effects at exposure levels encountered in food. International expert committees such as the Joint FAO/WHO Expert Committee on Food Additives have evaluated catalase from bovine liver and concluded that an acceptable daily intake is not limited when the enzyme is used according to good manufacturing practice, meaning no numerical ADI was required due to low toxicity concerns under typical use conditions. This reflects a long-standing regulatory practice of assessing enzyme preparations based on their specific catalytic activity, source material, and production controls to ensure safety. Safety research related to catalase often encompasses characterization of the enzyme’s biochemical properties, potential impurities from the source material, and the conditions under which it is produced and applied in food processing. Enzyme preparations derived from animal tissues are scrutinized for the presence of residual contaminants, such as host proteins or unwanted substances, which can be minimized through purification and quality control. Because catalase’s action yields water and oxygen from hydrogen peroxide, the reaction products themselves are benign, and there is no evidence that catalase introduces toxic degradation products under normal processing conditions. Studies of catalase and analogous enzymes also encompass assessments of allergenicity potential, particularly because proteins can elicit immune responses in susceptible individuals when present in sufficient quantities. However, the total protein content of enzyme preparations used in food processing and the functional domains relevant to catalytic activity are typically considered in safety assessments. The quantities of enzyme protein that may remain in final food products are generally low and subject to evaluation in comprehensive safety dossiers where required by specific regulatory schemes. Regulatory safety assessments for enzyme preparations do not typically involve extensive clinical studies in humans because the enzyme’s function and biochemical pathways are well characterized, and animal toxicology data often suffice to demonstrate safety at relevant exposure levels. Instead, safety research emphasizes biochemical characterization, purity criteria, and adherence to manufacturing standards that ensure the enzyme preparation is consistent with food-grade quality. This focus supports regulatory decisions that allow catalase to be used safely in food processing when good manufacturing practice is observed.
Regulatory Status Worldwide
Regulatory Status Worldwide In the United States, catalase from bovine liver is specifically listed in the Code of Federal Regulations at 21 CFR 184.1034 as a direct food substance affirmed as generally recognized as safe (GRAS) under conditions of current good manufacturing practice. Its inclusion in this regulatory listing means that it is allowed in food for its intended enzymatic function—breaking down hydrogen peroxide—without specified numerical use limits beyond good manufacturing practice. The regulatory text describes the ingredient, references its CAS Registry Number, and outlines that it meets general and additional requirements for enzyme preparations, such as those in recognized compendia. This affirmation reflects a regulatory consensus that catalase functions as intended and is safe when used appropriately in food processing. Internationally, the Joint FAO/WHO Expert Committee on Food Additives evaluated catalase from bovine liver and established that an acceptable daily intake (ADI) is "not limited," a designation indicating that based on available data, no numerical ADI was considered necessary for safety when the enzyme is used in accordance with good manufacturing practice. This evaluation reinforces the concept that at typical exposure levels from food processing uses, catalase does not pose safety concerns that would warrant a quantitative intake limit. The ADI not limited designation is documented in expert committee monographs that provide functional descriptions and specifications for food enzymes. Within the European Union, food enzymes such as catalase are subject to safety evaluation and authorization under EU regulations governing food enzymes. An enzyme preparation must be assessed and included on the Union List to be used legally. Specific published EFSA safety opinions exist for certain catalase enzymes sourced from porcine liver or microbial sources, reflecting the general regulatory requirement for individual evaluations. For catalase from bovine liver, explicit listing and safety evaluation may be required to market the enzyme preparation within the EU framework, and relevant assessments would need to demonstrate safety and technological need as part of the authorization process. Differences in regulatory frameworks highlight how enzymes are treated as both processing aids and food additives depending on regional definitions and statutory schemes. In other regions, local regulatory bodies will determine whether catalase from bovine liver can be used based on national food additive regulations or enzyme preparation approval processes. Across jurisdictions, the common regulatory theme is establishing that the enzyme performs a defined technological function, is produced under controlled quality conditions, and does not introduce harmful residues or by-products into food. These criteria help ensure that catalase remains an accepted tool in food processing when used responsibly and in compliance with local food safety regulations.
Taste And Functional Properties
Taste and Functional Properties In terms of sensory impact, catalase from bovine liver does not contribute a direct taste, aroma, or color to foods at the levels encountered during processing, as its primary role is catalytic rather than nutritive or flavor-active. Enzymes like catalase are typically neutral in sensory profiles when effectively purified for food use, and any residual organoleptic impact is minimized by the fact that it acts on specific substrates like hydrogen peroxide rather than interacting broadly with flavor compounds. Because the enzyme decomposes hydrogen peroxide into innocuous products—water and oxygen—its functional activity supports quality without introducing off-flavors or altering texture. From a functional perspective, catalase is active across a range of typical food process conditions, often showing optimal catalytic performance around neutral pH values and moderate temperatures encountered during many manufacturing steps. However, like many proteins, it can lose activity with exposure to extreme heat, very low pH values, or denaturing conditions. Stability during storage and use is therefore dependent on maintaining conditions that preserve protein structure, such as avoiding prolonged high temperatures and controlling exposure to denaturing agents. The functional behavior of catalase is grounded in its quaternary protein structure, which comprises multiple subunits that coordinate a heme cofactor necessary for catalytic activity. Catalase’s action—rapidly converting hydrogen peroxide to water and oxygen—can have functional implications beyond peroxide removal. For example, the release of oxygen gas during catalysis can influence microenvironments in processing equipment or food matrices by increasing dissolved oxygen levels transiently. This behavior must be understood in the context of processing objectives because oxygen can influence oxidation-reduction conditions and interact with other components in complex ways. Nevertheless, the enzyme’s primary contribution is to reduce potentially harmful oxidizing compounds, which supports maintenance of product quality and safety. Manufacturers consider functional properties such as enzyme kinetics, stability in solution, and compatibility with other ingredients when selecting catalase for use in specific applications. Because the enzyme does not act on nutritional components like proteins, carbohydrates, or fats, and because it does not introduce new flavors, its functional impact is concentrated on specific processing goals rather than sensory outcomes. This makes catalase a specialized tool in food processing, valued for its precision and minimal sensory footprint.
Acceptable Daily Intake Explained
Acceptable Daily Intake Explained An acceptable daily intake (ADI) is a regulatory concept used to describe the amount of a substance that can be consumed daily over a lifetime without appreciable health risk. For enzyme preparations like catalase from bovine liver, international expert committees have used the term "ADI not limited," indicating that based on safety evidence and typical exposure from food uses, no numerical limit is necessary. This designation does not mean that the enzyme can be consumed in unlimited quantities indiscriminately; rather, it reflects that at expected dietary exposures—primarily as a processing aid or enzyme additive—the enzyme does not pose appreciable risk, and exposure levels are far below thresholds of toxicological concern. The ADI not limited designation is based on evaluations that consider the enzyme’s source, biochemical properties, and absence of harmful effects at levels used in food processing. For substances with an ADI not limited, regulatory frameworks still require that the enzyme be used according to good manufacturing practice, meaning that levels and conditions of use are determined by technological need and not excessive beyond what is necessary to achieve the intended processing function. This approach integrates safety considerations with real-world use patterns. It is important to note that ADI values are not recommendations for consumption; they are safety benchmarks. For catalase from bovine liver, the ADI not limited designation supports regulatory acceptance in jurisdictions that recognize such expert evaluations, and it reassures manufacturers and regulators that enzyme residues in final products are unlikely to contribute to adverse health outcomes when used appropriately. The designation also underscores the context-specific nature of enzyme safety assessment, focusing on exposure through food processing rather than direct consumption as an ingredient in large amounts.
Comparison With Similar Additives
Comparison with Similar Additives Catalase from bovine liver can be compared with other enzyme-based additives such as catalase from microbial sources or glucose oxidase used in baking. While catalase specifically decomposes hydrogen peroxide, glucose oxidase catalyzes the oxidation of glucose to gluconic acid and hydrogen peroxide, which in turn may require catalase to mitigate oxidative residues. Both are enzymes used for technological purposes; however, glucose oxidase’s action produces hydrogen peroxide, which may affect dough strength and color, whereas catalase eliminates hydrogen peroxide, influencing downstream processing. Another comparison is with lactase, an enzyme used to hydrolyze lactose in dairy products. Lactase’s function is nutritive, reducing lactose content to make dairy products suitable for lactose-intolerant consumers, whereas catalase is a processing aid focused on mitigating residual oxidants. Both enzymes require careful control of activity and stability during processing, and both are subject to regulatory evaluation to ensure safe use. A further point of comparison is with enzymes like proteases used in meat tenderization. Proteases act on protein structures to modify texture, whereas catalase’s action on small peroxide molecules makes it functionally distinct. Proteases often have direct sensory and textural impacts, while catalase’s impact is indirect through improving processing conditions. These comparisons illustrate how enzyme-based additives differ in function, target substrates, and technological roles while sharing common regulatory considerations around safety, purity, and appropriate use levels.
Common Food Applications Narrative
Common Food Applications Narrative Catalase from bovine liver finds particular utility in dairy processing, especially in cheese manufacture, where hydrogen peroxide may be used in sanitation of equipment or treatment of raw milk to control microbial loads before starter cultures are added. After such treatments, residual hydrogen peroxide can inhibit beneficial microbes or affect product characteristics. Incorporating catalase allows manufacturers to reduce these residual oxidative agents, enabling fermentation and ripening processes to proceed as intended and supporting consistent sensory quality in cheese and related dairy varieties. In this context, its enzymatic action helps ensure that necessary sanitation steps do not carry over unintended effects into the final product. Beyond dairy, catalase can be applied in other food processes where hydrogen peroxide is introduced or generated. For instance, in some beverage processing lines, peroxide-based sanitizers are used on equipment and piping, and trace amounts of peroxide may remain after cleaning. Catalase assists in breaking down these traces during subsequent processing steps, supporting product stability and preventing oxidizing conditions that might affect color or flavor of sensitive beverages. Similarly, in the preparation of certain food ingredients that involve oxidative treatments, catalase can remove residual peroxide to prevent chemical changes in ingredients that could impair functionality or consumer acceptability. In industrial bakery settings or cereal processing where peroxide-based bleaching agents may be used on flours or doughs, catalase can serve to eliminate trace oxidative residues that could interfere with yeast fermentation or dough handling properties. The enzyme’s specificity and relatively mild mode of action make it a practical choice where chemical alternatives might be too harsh or could introduce unwanted sensory changes. Catalase’s role in food systems is generally supportive of broader quality and safety objectives rather than being a primary ingredient. It helps bridge the gap between necessary sanitation and processing steps that involve oxidants and the downstream goals of maintaining product integrity, consistent fermentation performance, and minimal sensory impact. Because its enzymatic action produces only water and oxygen as products, catalase can be considered a clean processing aid that aligns with contemporary quality standards in diverse food manufacturing environments.
Safety & Regulations
FDA
- Approved: True
- Regulation: 21 CFR 184.1034
EFSA
- Notes: EFSA safety evaluation for catalase from bovine liver specifically not identified
JECFA
- Notes: ADI not limited designation from JECFA evaluation; year not explicitly shown on source
- Adi Display: ADI not limited
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