Poly(sodium-p-styrenesulfonate)

CAS 25704-18-1

Benzenesulfonic acid, 4-ethenyl-, sodium salt (1:1), homopolymer

Molecular structure of 25704-18-1 — 1 Na⁺

US productionNot reported

Import value, 2024$516M

Top sourceGermany 22%

EPA exempts this chemical from its production survey.

Production is reported production, not a complete census of factories. Import value and source-country shares describe a shared customs category, not a separate chemical measurement.

Where It Comes From

Customs basis: HS 391190 · basket

These shares come from HS customs code 391190, which covers 36 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries

Country of origin for US imports, from Census customs data (2024).

DE 22%GermanyJP 17%JapanCA 15%CanadaGB 14%United KingdomCN 9%China

Malaysia
Sweden
Poland
Netherlands
Hungary
Denmark
Saudi Arabia
Brazil
Hong Kong
Trinidad and Tobago
Ireland
Australia
Lithuania
Israel
Slovenia
Turkey
Ecuador
Honduras
Peru
Philippines
Chile
Luxembourg
Dominican Republic
Vietnam
Czech Republic
Finland
Greece
United Arab Emirates

Why It Matters

No EPA sector or FDA product records name a use for this chemical.

Chemical Identity

CAS25704-18-1

PubChem CIDNot recorded

DTXSIDDTXSID5049734

Formula(C8H7NaO3S)n

Mol. WeightNot recorded

SMILES[Na+].[O-]S(=O)(=O)C1=CC=C(C=C1)C(-*)C-* |$;;;;;;;;;;;;star_e;;star_e$,c:6,8,t:4,lp:1:3,3:2,4:2,Sg:n:5,2,6,10,1,3,4,7,9,8,11,0,13::ht|

Data Sources

EPA TSCA InventoryRetrieved 2026-10-04
US Census international tradeReporting year: 2024 · Retrieved 2026-10-04

← Back to Dashboard

Brief citations

Poly(sodium-p-styrenesulfonate) (CAS 25704-18-1) https://chemicalindependence.com/chemical/25704-18-1/ EPA TSCA Inventory: CAS 25704-18-1. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory US Census international trade: HS 391190 for CAS 25704-18-1. Reporting year: 2024. https://usatrade.census.gov/