Food grade silica from Cabot

As a global leader in specialty chemicals and advanced materials, Cabot Corporation has long been committed to developing high-performance, safe and compliant material solutions for the food, pharmaceutical and industrial sectors. Its food-grade fumed silica products, represented by the CAB-O-SIL series, stand out in the global market with ultra-high purity, strict regulatory compliance and excellent application performance, becoming a core auxiliary material trusted by food processing, food contact materials and related industries worldwide. This article fully integrates Cabot's official technical data, product certification documents and industry application information to interpret the core advantages, product characteristics, compliance system and application value of Cabot food-grade silica in detail.

1. Core Products and Fundamental Properties of Cabot Food-Grade Silica

Cabot's food-grade silica belongs to the category of hydrophilic fumed silica, which is produced by the vapor-phase hydrolysis of silicon compounds, with a pure production process and stable product quality. The brand's representative food-grade models include CAB-O-SIL M-5 (general-purpose food-grade hydrophilic fumed silica) and CAB-O-SIL M-SP/M5P (pharmaceutical & food-grade high-purity model), both of which inherit the excellent characteristics of untreated fumed silica:

• High purity: Silica content (assay) reaches 99.0%–100.5%, far exceeding industry standard requirements;
• Unique microstructure: Aggregated structure, submicron particle size, low bulk density;
• Surface properties: Hydrophilic surface, good dispersibility and compatibility with most systems;
• Stable physical indicators: For the M-SP/M5P model, the BET surface area is controlled at 185.0–215.0 m²/g, pH value is 3.5–5.5, 325 mesh residue is less than 0.0200%, and heating loss is ≤1.0%, tamped density ≤60 g/l, with extremely low impurity content.

These inherent properties lay a solid foundation for the application of Cabot food-grade silica in food production and processing.

2. Strict Compliance Certification: The Ultimate Guarantee of Food Safety

Food-grade materials must meet the most stringent global regulatory and certification standards, and Cabot food-grade silica has passed a full set of authoritative certifications to fully adapt to the food safety requirements of various countries and regions:

2.1 Pharmacopoeia & Food Additive Compliance

• Comply with the U.S. Pharmacopoeia (USP), European Pharmacopoeia (EP) and Japanese Pharmacopoeia (JP), fully meeting the standards for colloidal silicon dioxide and light anhydrous silicic acid;
• Recognized as a legal food additive INS No. E551, compliant with U.S. FDA food contact regulations, China GB 2760 food additive use standards, and EU food safety regulations.

2.2 Religious & Safety Certifications

• Obtained Kosher certification from Switzerland's Swikosh GmbH and Halal certification from Switzerland's Halal Certification Services GmbH for its Rheinfelden, Germany production plant;
• No animal or plant-derived ingredients in the production process, free of genetically modified organisms (GMOs), food allergens, and disease precursors such as BSE/TSE, fully meeting the safety needs of vegetarian, halal and kosher food markets.

2.3 Impurity Control

Strictly limit harmful impurities: chloride content <250ppm, arsenic <8ppm, iron <500ppm, aluminum and calcium meet pharmacopoeia identification standards, ensuring no safety risks to the human body.

3. Core Application Value in the Food Industry

Cabot food-grade silica solves multiple pain points in food production and processing with its multi-functional performance, and is widely used in the following scenarios:

3.1 Anti-caking & Flow Improvement for Powdered Foods

Blended into sticky powdered food systems such as milk powder, seasoning powder, sugar powder, solid drinks and flour, it can reduce the angle of repose of powder, effectively prevent caking and blocking during storage and transportation, and improve the free flow of products. This is the most mainstream application of Cabot food-grade silica in the food industry.

3.2 Rheology Control for Liquid Food Systems

In liquid food systems such as sauces, dressings, food-grade adhesives and coatings, it plays a role in thickening, thixotropy (shear thinning) and anti-settling, ensuring the uniform texture and stable state of liquid foods, and is most efficient in non-polar to medium-polar food systems.

3.3 Reinforcement of Food-Grade Silicone & Rubber Materials

Used as a reinforcing agent for food-contact silicone and organic rubber products (such as silicone sealing rings, food-grade rubber hoses, baking molds), it significantly improves the hardness, tensile strength and elongation of materials, making food contact materials more durable and safe.

4. Global Production, Quality Control and Supply System

4.1 Standardized Production Base

Cabot food-grade silica is mainly produced at its Rheinfelden, Germany plant, adopting fully automated vapor-phase production technology, with a closed production environment to avoid external pollution, and the entire process does not involve any animal or plant raw materials.

4.2 Full-Process Quality Traceability

Each batch of products is equipped with a Certificate of Analysis (COA), which detects all indicators in accordance with ASTM and Cabot's proprietary testing methods, with unique batch numbers and packaging dates (equivalent to production dates) for full-process traceability. The company's quality department electronically approves all COA documents to ensure data authenticity.

4.3 Global Supply and Local Service

Cabot has built a complete sales and service network covering North America, South America, Europe, Middle East/Africa, Asia Pacific and Japan. In China, Cabot China Limited (558 Shuangbai Road, Minhang District, Shanghai) provides localized technical support, product consultation and after-sales service for food enterprises. Users can obtain MSDS (Material Safety Data Sheet) and product sales specifications through local representatives or Cabot's official website (cabotcorp.com).

5. Packaging, Storage and Shelf Life

To ensure the performance and safety of food-grade silica, Cabot has formulated professional packaging and storage specifications:

• Packaging forms: Multi-wall Kraft paper bags and flexible intermediate bulk containers (FIBCs) are adopted. In North America, it is supplied as 18×10 lb paper bags (180 lb net weight) and 250 lb FIBCs; in Europe and Asia, it is supplied as 18×10 kg paper bags (180 kg net weight) and 150 kg FIBCs;
• Storage conditions: Store at room temperature in a clean, dry environment, away from humidity and chemical vapors, and keep in the original packaging as much as possible;
• Shelf life: 2 years from the date of manufacture (pack date).

6. Industry Value and Development Prospects

With the continuous improvement of global food safety standards and the upgrading of food processing technology, the demand for high-purity, compliant food-grade inorganic auxiliary materials is growing rapidly. Cabot food-grade silica, with its high purity, full certification, multi-functional application and global supply capacity, has become a benchmark product in the industry. It not only solves the practical problems of food production, but also helps food enterprises meet the regulatory requirements of various countries and enhance product competitiveness.

As a responsible material supplier, Cabot will continue to invest in R&D and innovation, optimize the performance and production process of food-grade silica, and provide safer, more efficient and more environmentally friendly material solutions for the global food industry, promoting the high-quality development of the food processing and food contact materials industries.

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