Synthetic Amorphous Silica by Rail
Fumed and precipitated silica — ultra-light engineered powders. The car cubes out at a small fraction of its weight limit: precipitated grades load ~30–37 tons, fumed grades as little as 10–15.
| Railcar | Pressure-differential covered hopper (high cube) |
| Typical net load | 10–37 (grade-dependent) tons per car |
| Bulk density | ~2–20 (fumed vs. precipitated) lb/cu ft |
| Loading constraint | Cubes out (volume-limited) |
| STCC | 2819956 — look up related codes in the STCC Finder |
What it's used for
Tire and rubber reinforcement, coatings, toothpaste and food anti-caking, adhesives.
How it moves
Producers ship in high-cube pressure-differential cars unloaded pneumatically into silos; bagged product moves in boxcars. Even lightly loaded, one car replaces two to three trucks.
Where it flows
Key origins and gateways for synthetic amorphous silica on the Commodity Flow Map:
- Gulf Coast Chemical Corridor — Gulf Coast Chemical Corridor, TX ()
- Saskatchewan Potash Mines — Saskatchewan Potash Mines, SK (CPKC)
Common questions
Can synthetic amorphous silica be shipped by rail?
Yes. Synthetic Amorphous Silica moves regularly on the North American rail network in pressure-differential covered hoppers. Producers ship in high-cube pressure-differential cars unloaded pneumatically into silos; bagged product moves in boxcars.
How many tons of synthetic amorphous silica fit in a railcar?
A typical load is 10–37 (grade-dependent) net tons per car — the car fills up (cubes out) before it reaches its weight limit.
What railcar does synthetic amorphous silica move in?
Pressure-differential covered hopper (high cube). Because the commodity is light for its volume, shippers prefer the largest cubic capacity available.
What is the bulk density of synthetic amorphous silica?
Roughly 2–20 (fumed vs. precipitated) lb per cubic foot, depending on grade and condition.
Related tools
- Railcar Capacity Guide — loads and cubic capacities by car type
- Railcar Selector — match a commodity to the right equipment
- Rail vs Truck Calculator — where rail wins on your lane
- Transload Directory — 2,400+ transfer facilities
Shipping synthetic amorphous silica by rail?
Run your lane through the Rail Rate Quote tool for an indicative estimate, compare modes with Rail vs Truck, or find transfer points in the Transload Directory. We do not guarantee rates — we will talk through your lane before quoting.
Figures on this page are typical industry ranges for reference — actual loads depend on the specific car, commodity grade and railroad rules. Rate estimates are indicative only; Steel Wheel Logistics does not issue binding quotes from this page.