Silica-is-critical-for-feed-additive-safety-and-quality">Why FAMI-QS certified precipitated silica Is Critical for feed additive safety and Quality
By Sensilchem Technical Team | 2026-08-17
The global feed industry produces over 1.2 billion tonnes of compound feed annually. Behind every tonne lies a complex chain of additives â vitamins, minerals, trace elements â that must remain stable, bioavailable, and uniformly distributed from factory to farm. Precipitated silica (SiOâ) plays an indispensable role in this chain as a high-performance vitamin carrier and anti-caking agent. But not all silica is created equal when animal nutrition and food safety are at stake.
This technical guide explains why FAMI-QS certification matters for feed-grade Precipitated Silica, how Censil products meet the highest safety standards, and what procurement managers should look for when sourcing silica for feed applications.
What Is FAMI-QS and Why Does It Matter for Feed Silica?
FAMI-QS (Feed Additives and Premixtures Quality System) is the European trade association's internationally recognized certification scheme for the feed additives and premixtures industry. It is specifically designed to ensure:
- Feed safety â compliance with HACCP principles and EU Feed Hygiene Regulation (EC) No 183/2005
- Product quality â consistent specifications batch after batch
- Traceability â full supply chain transparency from raw material to finished product
- Regulatory compliance â alignment with EFSA (European Food Safety Authority) standards
For precipitated silica used as a carrier in vitamin premixes or as an anti-caking agent in feed formulations, FAMI-QS certification is the gold standard that separates qualified suppliers from general industrial silica producers.
How Precipitated Silica Functions in Feed Applications
As a Vitamin Carrier
Fat-soluble vitamins (A, D, E, K) are inherently unstable â sensitive to heat, light, oxygen, and moisture. Precipitated silica acts as a solid carrier matrix that:
| Function | Mechanism | Benefit |
|---|---|---|
| Adsorption | High surface area (200-350 m²/g) binds liquid vitamins | Converts liquids to stable, free-flowing powders |
| Protection | Porous structure shields vitamins from oxidation | Extends shelf life by 30-50% vs. unprotected vitamins |
| Uniform distribution | Consistent particle size (5-50 μm) | Ensures even vitamin dosing in final feed mix |
| Moisture control | Oil/water absorption capacity | Keeps premix dry and free-flowing |
Censil 2200 and Censil 665 are specifically engineered for vitamin carrier applications, with optimized pore volume and particle size distribution for maximum vitamin loading efficiency.
As an Anti-Caking Agent
Feed premixes contain hygroscopic ingredients (minerals, vitamins, amino acids) that readily absorb moisture and form hard lumps. Precipitated silica prevents this by:
- Surface coating: Ultra-fine silica particles coat larger particles, creating a moisture barrier
- Free-flow enhancement: Reduces inter-particle friction and cohesion
- Humidity resistance: Maintains flowability even at 70%+ relative humidity
Censil 3651C is optimized for anti-caking applications, with a bulk density of 180-250 g/L that ensures easy blending without segregation.
Censil Product Range: FAMI-QS Certified feed-grade silica
Sensil International LLC operates under FAMI-QS certification (valid through March 2027), covering all Censil feed-grade precipitated silica products:
| Product | Surface Area (m²/g) | Bulk Density (g/L) | Primary Use | Typical Dosage |
|---|---|---|---|---|
| Censil 2200 | 280-350 | 200-280 | Vitamin A/D/E carrier | 25-40% of premix weight |
| Censil 665 | 200-280 | 250-350 | General vitamin carrier, anti-caking | 15-30% of premix weight |
| Censil 3651C | 220-300 | 180-250 | Premix carrier, anti-caking | 10-20% of premix weight |
| Censil 95 | 150-220 | 300-400 | Free-flow agent for mineral mixes | 5-10% of mix weight |
Key Technical Specifications (All Censil Feed-Grade Products)
- SiOâ content: â¥90% (dry basis)
- Heavy metals: Pb < 5 ppm, As < 3 ppm, Cd < 1 ppm (compliant with EU feed additive directives)
- Loss on drying: â¤5.0% (105°C, 2h)
- pH value: 6.0-8.0 (aqueous suspension)
- Particle size (D50): 8-25 μm (product-dependent)
FAMI-QS vs. Non-Certified Silica: What's the Real Difference?
When sourcing precipitated silica for feed applications, the certification difference translates to measurable operational and safety advantages:
| Aspect | FAMI-QS Certified (Censil) | Non-Certified Industrial Silica |
|---|---|---|
| Feed safety | HACCP-compliant, documented risk controls | No systematic feed safety management |
| Heavy metal control | Batch-tested, CoA provided | May exceed feed-grade limits |
| Traceability | Full lot traceability (raw material â shipment) | Limited or no traceability |
| Regulatory acceptance | Accepted by EU, FAMI-QS member countries | May require additional testing/certification |
| Audit readiness | Full documentation package available | Customer must conduct independent audits |
| Consistency | ISO-controlled production, tight spec bands | Batch-to-batch variability common |
For compound feed manufacturers serving export markets (EU, Southeast Asia, Middle East), using non-certified silica introduces compliance risk that can result in shipment rejections, regulatory penalties, or product recalls.
FAQ-precipitated-silica-for-feed-applications">FAQ: Precipitated Silica for Feed Applications
What is the recommended dosage of precipitated silica in vitamin premixes?
For vitamin A/D/E carrier applications, Censil 2200 is typically used at 25-40% of the total premix weight. This ratio provides optimal vitamin loading (up to 500,000 IU/g for cross-linked vitamin A powder) while maintaining free-flow properties. For mineral-rich premixes, Censil 665 at 15-30% offers a cost-effective balance of carrier performance and anti-caking protection.
Is FAMI-QS certification required for all markets?
While FAMI-QS is an EU-originated scheme, it has become the internationally recognized standard for feed additive quality. Major importers in Southeast Asia, the Middle East, and South America increasingly require FAMI-QS certification as a prerequisite for supplier approval. Censil's FAMI-QS certification (valid through March 2027) covers all export markets.
How does precipitated silica compare to other carriers like calcium carbonate?
Precipitated silica offers 3-5Ã higher oil/water absorption capacity than calcium carbonate, making it far more efficient for liquid vitamin adsorption. It also provides superior anti-caking performance due to its unique porous structure and particle morphology. While calcium carbonate is cheaper per tonne, the effective cost per unit of vitamin carried is often comparable or lower with silica due to reduced dosage requirements.
Can Censil products be used in organic feed production?
Yes. CENSIL precipitated silica is listed as an acceptable processing aid in organic feed formulations in multiple jurisdictions. The FAMI-QS certification ensures full compliance with feed safety regulations. Contact our technical team for specific organic certification documentation.
What is the shelf life of vitamin premixes using Censil silica as carrier?
Properly formulated vitamin premixes using Censil 2200 or Censil 665 as carrier typically maintain >90% vitamin potency for 18-24 months when stored in sealed containers at temperatures below 25°C. The silica carrier significantly slows oxidation degradation compared to liquid vitamin formulations.
How to Evaluate a Precipitated Silica Supplier for Feed Applications
When selecting a silica supplier for feed additive applications, procurement managers should verify:
- FAMI-QS certification â request the current certificate and scope of certification
- Product specifications â request a Certificate of Analysis (CoA) for each batch
- Heavy metal testing â confirm Pb, As, Cd, Hg levels are below feed-grade limits
- Production consistency â ask about ISO quality management systems
- Technical support â ensure the supplier provides application-specific guidance
- Regulatory documentation â confirm availability of EFSA-compliant dossiers
Sensil International LLC provides all of the above as standard practice for Censil feed-grade products. Our FAMI-QS certification, combined with 20+ years of precipitated silica expertise, ensures you receive consistent, compliant, high-performance silica for every shipment.
Conclusion: Quality Assurance Starts with the Right Carrier
In the feed additive industry, the carrier is not just an excipient â it is the foundation of product stability, safety, and efficacy. Choosing FAMI-QS certified precipitated silica from Censil means choosing:
- â Verified feed safety and quality management
- â Optimized products for specific feed applications
- â Full regulatory compliance for global markets
- â Consistent batch-to-batch performance
- â Technical support from an industry specialist
Ready to upgrade your feed additive carrier solution? Contact Sensil International LLC for product samples, technical data sheets, or a custom formulation consultation.
ð§ Email: sales@sensilchem.com
ð Website: sensilchem.com
About Sensil International LLC: Sensil International LLC is a FAMI-QS certified supplier of precipitated silica (SiOâ) for feed and coating applications. The Censil product line serves the global feed industry with vitamin carrier and anti-caking solutions, while Sensil Coating serves the industrial coatings market with Matting Agents and anti-corrosion pigments.