Silica, amorphous, fumed, cryst.-free
CAS 112945-52-5
U.S. production volumes are classified as confidential business information.
At least one company claimed its 2023 production or import volume for this chemical as confidential, so EPA withholds it.
Why supply is unknownProduction is reported production, not a complete census of factories. US production volume is confidential. Production reporting year: 2023. Import value and source-country shares describe a shared customs category, not a separate chemical measurement.
Where It Comes From
Customs basis: HS 281122 · narrow
- 2023
- US production Confidential · Imports Confidential
- 2019
- US production Confidential · Imports Confidential
These shares come from HS customs code 281122, which covers 6 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.
- Canada
- Singapore
- Spain
- Ukraine
- Switzerland
- Austria
- Bosnia and Herzegovina
- Lithuania
- Indonesia
- Australia
- Turkey
- Poland
- Vietnam
- Belgium
- Iceland
- Morocco
- Egypt
- Peru
- Israel
- Portugal
Show all 6
Why It Matters
Industrial Uses
Used in 11 sectors as 7 functional roles.
- •Filler in Construction (100%)Processing—incorporation into formulation, mixture, or reaction product
- •Thickening agent in Construction (100%)Processing—incorporation into formulation, mixture, or reaction product
- •Sealant (barrier) in All Other Chemical Product and Preparation ManufacturingProcessing as a reactant
- •Insulators in Paint and Coating Manufacturing (1%)Processing—incorporation into formulation, mixture, or reaction product
- •Binder in Construction (6%)Processing—incorporation into formulation, mixture, or reaction product
- •Thickening agent in Synthetic Rubber Manufacturing (25%)Processing—incorporation into formulation, mixture, or reaction product
- •Thickening agent in Non-metallic Mineral Product Manufacturing (includes clay, glass, cement, concrete, lime, gypsum, and other non-metallic mineral product manufacturing) (25%)Processing—incorporation into formulation, mixture, or reaction product
- •Thickening agent in Petroleum Lubricating Oil and Grease Manufacturing (25%)Processing—incorporation into formulation, mixture, or reaction product
- •Filler in Not Known or Reasonably AscertainableProcessing—incorporation into formulation, mixture, or reaction product
- •Thickening agent in Asphalt Paving, Roofing, and Coating Materials Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product
- •Opacifer in Textiles, apparel, and leather manufacturing (100%)Processing—incorporation into article
- •Abrasives in Food, beverage, and tobacco product manufacturing (50%)Processing—incorporation into formulation, mixture, or reaction product
- •Abrasives in Pharmaceutical and Medicine Manufacturing (50%)Processing—incorporation into formulation, mixture, or reaction product
- •Filler in All Other Chemical Product and Preparation Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product
- •Filler in Synthetic Rubber Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product
Vendor Pricing
Prices reflect listed pack sizes. Small research packs run far above bulk rates.
16 more vendors
| Vendor | Country Supplier country. Where available, shows shipping origin. When the supplier ships from a different country than where they are registered, both are shown. Most suppliers show registration country only. | $/g | Pack | Purity |
|---|---|---|---|---|
| Angene Chemical | China → Hong Kong | $0.01 | 25 kg | — |
| Fluorochem UK | United Kingdom | $0.01 | 25 kg | — |
| Fluorochem EU | Germany | $0.01 | 25 kg | — |
| A2B Chem LLC (2 weeks) | United States | $0.01 | 5 kg | 90% |
| A2B Chem LLC | United States | $0.01 | 25 kg | — |
| AA BLOCKS | United States | $0.01 | 25 kg | — |
| AA BLOCKS (2 weeks) | United States | $0.01 | 5 kg | 90% |
| Sigma-Aldrich (Rush Stock) | Germany | $0.03 | 25 kg | — |
| Sigma-Aldrich | Germany | $0.03 | 25 kg | — |
| MedChemExpress MCE | Sweden | $0.04 | 2.5 kg | — |
| AK Scientific, Inc. | United States | $0.06 | 1 kg | — |
| Apollo Scientific UK | United Kingdom | $0.10 | 10 kg | 99.8% |
| AstaTech, Inc | United States | $0.20 | 500 g | 95% |
| Angene International Limited | United States | $0.21 | 500 g | 99% |
| Combi-Blocks, Inc. | United States | $0.25 | 1 kg | 95% |
| Angene | China → Hong Kong | $4266.67 | 30 mg | 90% |
Chemical Identity
Data Sources
- EPA CompTox (DSSTox) · DTXSID4029852Retrieved 2026-04-06
- PubChem · compound 24261Retrieved 2026-04-06
- EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04
- EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04
- US Census international tradeReporting year: 2024 · Retrieved 2026-10-04
Brief citations
Silica, amorphous, fumed, cryst.-free (CAS 112945-52-5) https://chemicalindependence.com/chemical/112945-52-5/ EPA CompTox (DSSTox): DTXSID4029852. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID4029852 PubChem: 24261. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/24261 EPA Chemical Data Reporting: 112945-52-5. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 112945-52-5. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 281122 for CAS 112945-52-5. Reporting year: 2024. https://usatrade.census.gov/