Styrene
CAS 100-42-5
U.S. production volumes are classified as confidential business information.
US productionCBI
Confidential Business Information. The EPA withholds this volume because publishing it could reveal the reporting company's trade secrets.
Import value, 2024$263M
Top sourceCanada 100%
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.
Where It Comes From
Customs basis: HS 290250 · exact
EPA reports by year
- 2023
- US production Confidential · Imports Confidential
- 2019
- US production Confidential · Imports Confidential
Source Countries
Country of origin for US imports, from Census customs data (2024).
CA 100%Canada
- Dominican Republic
- China
- Netherlands
- Italy
EPA-registered manufacturers (15)
Companies that report making or importing this chemical to the EPA. Registration is US-centric and does not indicate import origin.
Shell Plc · GB United Kingdom
Shin-Etsu Chemical · JP Japan
Allnex Usa
Bvpv Styrenics
Cos-Mar
Show all 15
Dupont Specialty Products Usa
Dynachem
Gulf Coast Growth Ventures
Hudson Products
Ineos Styrolution America
Lyondell Chemical
Shell Chemical Appalachia
Shell Petroleum
Shintech Louisiana
Westlake
Domestic parents -- activity not disclosed (8)
EPA records name a US company for this chemical but do not disclose whether the company made it here or imported it.
Coatings And Adhesives
Deltech Monomers Bidco Holdings
Eastman Chemical
Icc Industries
Ineos Enterprises Us Hold
Show all 8
Polynt Composites Usa
Scott Bader
Soyventis North America
EPA-registered importers (14)
Companies that report making or importing this chemical to the EPA. Registration is US-centric and does not indicate import origin.
Bridgestone · JP Japan
Mapei · IT Italy
Shell Plc · GB United Kingdom
Aoc
Bridgestone Americas
Show all 14
Composites One
Fibergrate Composite Structures
Lx Hausys America
Polyglass Usa
Roberlo Usa
Styropek Usa
Superior Industrial Solutions
The Sherwin Williams
Univar Solutions Usa
Why It Matters
Sectors
EnergyTransportationConstructionMetals & MiningPlastics & RubberConsumer ProductsPaints & CoatingsCore Chemicals
Downstream UsesNot recorded
FDA Shortage Status
Whether any manufacturer currently reports this drug as in shortage on the FDA Drug Shortages database. "Active Shortage" means at least one presentation has status "current."
No FDA shortage records
Industrial Uses
Used in 18 sectors as 8 functional roles.
- •Fuel agents in Petroleum Refineries (100%)Processing as a reactant
- •Intermediate in Petrochemical Manufacturing (100%)Processing as a reactant
- •Intermediate in Oil and Gas Drilling, Extraction, and Support activities (100%)Processing—incorporation into article
- •Solvent in Plastics Material and Resin Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product
- •Solvent in Not Known or Reasonably Ascertainable (0%)Processing—incorporation into formulation, mixture, or reaction product
- •Monomers in Synthetic Rubber Manufacturing (20%)Processing as a reactant
- •Monomers in Plastics Material and Resin Manufacturing (80%)Processing as a reactant
- •Intermediate in Synthetic Rubber Manufacturing (4%)Processing as a reactant
- •Intermediate in Miscellaneous Manufacturing (6%)Processing as a reactant
- •Intermediate in All Other Basic Organic Chemical ManufacturingProcessing as a reactant
- •Monomers in Paint and Coating Manufacturing (0%)Processing—incorporation into formulation, mixture, or reaction product
- •Monomers in Transportation Equipment ManufacturingProcessing—incorporation into article
- •Monomers in Miscellaneous ManufacturingProcessing—incorporation into article
- •Monomers in Furniture and Related Product ManufacturingProcessing—incorporation into article
- •Monomers in Wood Product ManufacturingProcessing—incorporation into article
- •Solvent in Paint and Coating Manufacturing (0%)Processing—incorporation into formulation, mixture, or reaction product
- •Plasticizer in Asphalt Paving, Roofing, and Coating Materials Manufacturing (0%)Processing—incorporation into formulation, mixture, or reaction product
- •Monomers in Plastics Product Manufacturing (100%)Processing as a reactant
- •Fuel agents in Other (100%)Processing—incorporation into formulation, mixture, or reaction product
- •Antioxidant in Oil and Gas Drilling, Extraction, and Support activities (100%)Processing as a reactant
- •Monomers in Rubber Product Manufacturing (4%)Processing as a reactant
- •Monomers in All Other Chemical Product and Preparation Manufacturing (3%)Processing—incorporation into formulation, mixture, or reaction product
- •Monomers in Adhesive Manufacturing (1%)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
- •Etching agent in Oil and Gas Drilling, Extraction, and Support activitiesProcessing—incorporation into formulation, mixture, or reaction product
Vendor Pricing
$0.16/gFluorochem UK
CountryUnited Kingdom
Pack$80.08 / 500 g
Purity99%
Vendors7 available
Prices reflect listed pack sizes. Small research packs run far above bulk rates.
6 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 |
|---|---|---|---|---|
| A2B Chem LLC | United States | $2.04 | 25 g | 99% |
| AA BLOCKS | United States | $2.12 | 25 g | 99% |
| A2B Chem LLC (1 week) | United States | $39.80 | 5 g | — |
| AA BLOCKS (1 week) | United States | $41.00 | 5 g | — |
| Sigma-Aldrich (Rush Stock) | Germany | $207.24 | 250 mg | — |
| Sigma-Aldrich | Germany | $207.24 | 250 mg | — |
Chemical Identity
CAS100-42-5
PubChem CID7501
DTXSIDDTXSID2021284
FormulaC8H8
Mol. Weight104.15 g/mol
SMILESC=CC1=CC=CC=C1
Data Sources
- EPA CompTox (DSSTox) · DTXSID2021284Retrieved 2026-04-06
- PubChem · compound 7501Retrieved 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
Styrene (CAS 100-42-5) https://chemicalindependence.com/chemical/100-42-5/ EPA CompTox (DSSTox): DTXSID2021284. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID2021284 PubChem: 7501. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/7501 EPA Chemical Data Reporting: 100-42-5. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 100-42-5. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 290250 for CAS 100-42-5. Reporting year: 2024. https://usatrade.census.gov/