Grade reference
The CENSIL grade family — 18 grades, nine tracks
Precipitated carriers, porous silica-based materials, treated and untreated matting silica, hydrophobic and high-absorption defoamer grades, low-iron antiblock silica and granular masterbatch grades. Each is positioned by the job it does in a customer's process, and each is supplied with the controlled TDS, lot COA and SDS that will govern supply.
No brochure numbers on this page. We publish grade positioning, not typical-value tables. Final performance, compliance and application fit follow the supplier's latest TDS, the lot COA and your own trial — request the document set for any grade and it comes with the sample.
Grade family at a glance
| Grade | Material type | Where it sits in the screening | Application tracks |
|---|---|---|---|
| CENSIL 260P | Precipitated silica powder | Base carrier. Start here when the liquid load is moderate and the real problem is flow and caking rather than raw absorption capacity. | Feed Additive Flow & Carrier · Agrochemical Carrier · Food Powder Flow |
| CENSIL 265P | Precipitated silica powder | Middle route. Takes more liquid than 260P while keeping the powder free-running — the usual answer when 260P holds the load but the flow is not there. | Feed Additive Flow & Carrier · Agrochemical Carrier |
| CENSIL 280P | Precipitated silica powder | High-loading candidate for choline chloride, organic acids and other demanding liquids where target loading is the binding constraint. | Feed Additive Flow & Carrier · Agrochemical Carrier |
| CENSIL 310 | Porous silica-based material | Moderate-surface porous route for food powders, toothpaste cleaning duty and flavour carriers. The general-purpose choice when structure and adsorption both matter. | Food Powder Flow · Oral Care Silica · Industrial Fluoride Removal |
| CENSIL 320 | Porous silica-based material | High-surface porous grade. Used in food and oral-care structure work, and the preferred base substrate for functionalised fluoride-adsorbent screening. | Food Powder Flow · Oral Care Silica · Industrial Fluoride Removal |
| CENSIL 150 | High-purity fine silica powder | Fine-powder candidate for oral-care paste structure and appearance work — settled on your own paste, not on a spec sheet. | Oral Care Silica |
| CENSIL 500 | High pore-volume silica | Supplied as a coating matting grade; used on the fluoride track as a high pore-volume comparison substrate when a screening programme needs a contrast material. | Industrial Fluoride Removal · Coating Matting & Rheology |
| CENSIL 230W | Precipitated matting silica, specially treated | Specially treated for waterborne compatibility and refined surfaces. The first grade to test when a waterborne clear has to stay transparent while going matt. | Coating Matting & Rheology |
| CENSIL 525L | Precipitated matting silica, organically treated | Organically treated for resin compatibility and easy dispersion. The general-purpose matting route across wood, industrial, UV, plastic and leather coatings. | Coating Matting & Rheology |
| CENSIL 560N | Precipitated matting silica, untreated | Untreated. Balances matting, rheology, anti-settling and cost for industrial, coil, powder and conventional systems. | Coating Matting & Rheology |
| CENSIL 17 | Hydrophobic silica | The hydrophobic, anti-caking route for oil-based defoamer systems. Compatibility with mineral oil, silicone oil, polyether and waterborne systems is confirmed case by case. | Defoaming & System Stability |
| CENSIL 698 | High-absorption silica powder | High-absorption candidate for liquid powdering — taking a defoamer oil or liquid active onto a carrier that stays easy to handle. | Defoaming & System Stability |
| CENSIL 688 | High-absorption silica powder | Companion high-absorption route, aimed at liquid powdering and powder-system stability. | Defoaming & System Stability |
| CENSIL 773 | Low-iron, high-purity precipitated silica | The low-iron, high-purity route where film optics matter. Usually the first antiblock candidate for clear packaging film and its masterbatch. | Plastic Film Antiblock · Functional Masterbatch Dispersion |
| CENSIL 779 | Low-iron, high-purity precipitated silica | Same low-iron platform, aimed at tighter downstream appearance — and the powder route for masterbatch plants whose customers judge the film by eye. | Plastic Film Antiblock · Functional Masterbatch Dispersion |
| CENSIL 185P | Precipitated silica powder | Conventional precipitated comparison route for film antiblock. Run it beside 773 or 779 when cost position has to be part of the decision. | Plastic Film Antiblock |
| CENSIL 165GR | Granular precipitated silica | Granular, for masterbatch production where feeding stability and dust control drive the choice more than fineness. | Functional Masterbatch Dispersion |
| CENSIL 185GR | Granular precipitated silica | Granular grade at a higher surface-area position, for masterbatch work that needs more functional loading from the same feeding behaviour. | Functional Masterbatch Dispersion |
Which grades serve which track
| Track | Applications | Lead grades | Entry point |
|---|---|---|---|
| Feed Additive Flow & Carrier | Premixes · Vitamin blends · Trace minerals · Liquid additive powdering | CENSIL 260P · CENSIL 265P · CENSIL 280P | Liquid carrying · powdering · flow aid · anti-caking · mixing uniformity |
| Food Powder Flow | Seasonings · Powdered beverages · Soups · Dry blends | CENSIL 310 · CENSIL 320 · CENSIL 260P | Caking · flow · dispersion · filling · shelf life |
| Oral Care Silica | Toothpaste · Oral-care pastes · OEM / private-label filling | CENSIL 310 · CENSIL 320 · CENSIL 150 | Cleaning vs. structure role split · RDA · viscosity · paste stability |
| Agrochemical Carrier | WP/WG inert carrier · SC anti-caking / rheology | CENSIL 260P · CENSIL 265P · CENSIL 280P | Physical stability only · adsorption · WG disintegration · SC sediment · dust |
| Industrial Fluoride Removal | Industrial wastewater · Post-precipitation polishing · Substrate screening · Project supply | CENSIL 320 · CENSIL 310 · CENSIL 500 | Water analysis · substrate screening · jar test · dynamic column trial · project replenishment |
| Coating Matting & Rheology | Wood · Industrial · UV · Waterborne · Powder · Coil · Leather coatings | CENSIL 230W · CENSIL 525L · CENSIL 560N | Target gloss · resin system · surface treatment · application conditions |
| Defoaming & System Stability | Defoamer compounders · Coatings · Paper · Textile · Construction chemicals · Water treatment | CENSIL 17 · CENSIL 698 · CENSIL 688 | System type · knock-down · persistence · compatibility · powdering |
| Plastic Film Antiblock | PE · PP · PET films · Blown · Cast · BOPP · BOPET · CPP | CENSIL 773 · CENSIL 779 · CENSIL 185P | Film type · resin · target haze · opening force · COF |
| Functional Masterbatch Dispersion | Antiblock masterbatch · Functional masterbatch · Modified plastics · Film additive masterbatch | CENSIL 165GR · CENSIL 185GR · CENSIL 779 | Resin · equipment · loading · screen-pack pressure · downstream film targets |
Reading the fluoride track correctly
CENSIL 320, 310 and 500 appear on the industrial fluoride removal track as candidate porous-silica substrates for aluminium-, iron- or composite-modified adsorbent programmes. Plain precipitated silica does not remove fluoride, and none of these grades is offered as a finished, validated fluoride adsorbent. Whether a functionalised route can be adopted is decided by jar tests and dynamic column trials on your own water — see the fluoride removal solution page for the screening path and the comparison routes.
Documents that travel with every grade
- TDS — the controlled technical data sheet for the specific grade, from the supplier's latest issue
- COA — lot certificate of analysis; every production lot is tested before it ships
- SDS / MSDS — safety data sheet in the destination language where required
- Use declarations — food-contact, feed-material, cosmetic or industrial use statements as applicable to the grade
- Third-party reports — heavy metals, microbiology or other tests where the application calls for them
Regulatory references for precipitated silica
Applicability to a given grade is confirmed on its own document set; the references below describe the material class.
- REACH: silicic acid, precipitated — EINECS 231-545-4
- Food additive (EU): E 551 — Reg. (EU) No 231/2012, food-grade material only
- Food additive (US): 21 CFR § 172.480, food-grade material only
- Feed material: EU Register of Feed Materials, silicic acid precipitated
- Cosmetics (EU): INCI Hydrated Silica — Reg. (EC) No 1223/2009
- Hazard classification: no classification under CLP Reg. (EC) 1272/2008 for precipitated silica
How it ships
- 20 kg paper bag — three-ply kraft, PE-lined; our standard export pack
- 25 kg paper bag — three-ply kraft, PE-lined, delivered palletized under stretch wrap
- 500 kg big bag (FIBC) — PE-lined Type C or D, for bulk industrial volumes
- 1,000 kg big bag (FIBC) — PE-lined Type C or D, for bulk industrial volumes
- Granular grades (165GR / 185GR) — bag and FIBC options confirmed per order to protect the granule on the way
Want the controlled TDS — or material to test?Start from the process problem: application, current material, formulation or resin or water conditions, equipment and target metric. We confirm a grade direction, then back it with samples and the full document set.