Food-Grade Silicon Dioxide (INS 551): ANVISA Regulations and Application Landscape in Brazil

Food-Grade Silicon Dioxide (INS 551): ANVISA Regulations and Application Landscape in Brazil

Amorphous synthetic silica (food additive code INS 551) is one of the most widely used food anti-caking agents globally. In Brazil, with the continuous expansion of processed food, nutritional supplements and industrialized condiment segments, demand for food-grade silica is rising steadily, under the full supervision of the National Health Surveillance Agency (ANVISA).

1. Current ANVISA Regulatory Status

Pursuant to RDC nº 239/2018, silica (INS 551) is approved for use as a food additive in Brazil, with functions including anti-caking agent, antioxidant and processing aid, applicable to multiple food categories.

Key regulatory points:

• Core function: Anti-caking agent, used to prevent moisture absorption and caking of powder products

• Usage limits: Set by food category; most categories follow the quantum satis principle (minimum necessary amount), in line with good manufacturing practices

• Purity standards: Must meet purity requirements of JECFA (FAO/WHO) or the Food Chemicals Codex (FCC)

• Access rule: Under RDC 27/2010, food additives do not require pre-registration, but manufacturers/importers must retain full compliance documents for inspection

In 2022, ANVISA exceptionally approved the use of silica in dietary supplements for infants and young children, with a limit of 1.0 g/100 ml, reflecting the gradual liberalization of regulation for segmented application scenarios.

2. Core Application Scenarios in the Brazilian Market

• Condiments and spices: Solves the caking problem of salt, pepper and compound seasonings in humid climates, and is a raw material for food factories in Northeast and Northern Brazil

• Milk powder and infant formula: Improves powder flowability and prevents compaction during storage

• Nutritional supplements and protein powder: Core anti-caking additive for whey protein, creatine, vitamin powder and other products, the fastest-growing application segment in Brazil

• Dehydrated food: Instant soups, powdered sauces, instant coffee, nutritional yeast and other products

• Tableted candies and tablets: Used as a lubricant during tableting processes

3. Core Advantages of Food-Grade Silicon Dioxide

• High efficiency at low dosage: Usually 0.1–0.5% addition can achieve excellent anti-caking effect

• Strong chemical inertness: Does not react with other ingredients, nor change food flavor, color or nutritional value

• Excellent moisture resistance: Porous structure absorbs surface moisture and maintains powder flowability

• Global compliance: Approved by Mercosur, the EU, the US and more than 100 countries and regions, facilitating food enterprises’ export business

4. Core Supplier Selection Criteria

When selecting food-grade silica, Brazilian local purchasers should focus on verifying:

1. Batch Certificate of Analysis (COA) clearly marked as meeting FCC or JECFA standards

2. Compliance statement in accordance with Brazilian regulations

3. Heavy metal control indicators (Pb ≤ 1 ppm, As ≤ 0.5 ppm)

4. Crystalline silica-free certification — crystalline silica is prohibited in food processing

Conclusion

With the continuous upgrading of Brazil's food industry and rising quality requirements, INS 551 food-grade silicon dioxide has become an indispensable basic additive. For importers and manufacturers, ensuring ANVISA compliance and batch-to-batch quality stability is the core prerequisite for avoiding health supervision risks and ensuring stable production.

(Food-Grade Silicon Dioxide (INS 551): ANVISA Regulation and Applications in the Brazilian Market

Synthetic amorphous silicon dioxide, classified as food additive INS 551, is one of the most widely used anticaking agents in the global food industry. In Brazil, its demand is growing driven by the expansion of the processed food, nutritional supplement, and industrialized seasoning sectors, and it is regulated by the National Health Surveillance Agency (ANVISA).

1. Regulatory status at ANVISA

According to RDC No. 239/2018, silicon dioxide (INS 551) is authorized in Brazil as a food additive with the function of anticaking agent, antioxidant, and processing aid, for various food categories.

Key points of the regulation:

• Main function: anticaking agent, used to prevent clumping of powders and granules

• Usage limits: defined by food category, following the principle of the minimum quantity necessary (quantum satis in most cases, based on good manufacturing practices)

• Purity standard: must meet the specifications of JECFA (FAO/WHO) or the Food Chemicals Codex (FCC)

• Registration exemption: food additives do not require prior registration with ANVISA, in accordance with RDC 27/2010, but the manufacturer must keep compliance documentation available for inspection

In 2022, ANVISA exceptionally approved the use of silicon dioxide in food supplements for infants and young children, with a limit of 1.0 g/100 ml, demonstrating regulatory flexibility for specific applications.

2. Main applications in the Brazilian market

• Seasonings and condiments: prevents caking of salt, pepper, and seasoning mixes in humid environments, a recurring challenge in tropical climate regions

• Powdered milk and infant formulas: improves flowability and prevents compaction during storage

• Nutritional supplements and protein powders: essential for whey protein, creatine, and vitamin formulas, a fast-growing segment in Brazil

• Dehydrated foods: soups, powdered sauces, instant coffee, and nutritional yeast

• Tablets and pills: as a glidant in compression processes

3. Advantages of food-grade silicon dioxide

• High efficiency at low dosages: usually 0.1–0.5% is enough to achieve an anti-caking effect

• Chemical inertness: does not react with other ingredients, does not alter flavor, color, or nutritional value

• Stability under high humidity: porous structure absorbs surface moisture, maintaining product flowability

• Global compliance: accepted in Mercosur, the EU, the USA, and more than 100 countries, facilitating exports

4. Selection criteria for suppliers in Brazil

When choosing a food-grade silicon dioxide supplier, it is essential to verify:

1. Certificate of analysis (COA) with FCC or JECFA specifications

2. Declaration of conformity with Brazilian legislation

3. Heavy metal control (Pb ≤ 1 ppm, As ≤ 0.5 ppm)

4. Absence of crystalline silica, which is prohibited in food

Conclusion

With the Brazilian food industry constantly evolving and quality requirements increasingly higher, food-grade silicon dioxide INS 551 is establishing itself as an essential additive. For importers and manufacturers, ensuring ANVISA compliance and batch-to-batch quality is fundamental to avoiding health and operational risks.)