Sodium 4-vinylbenzenesulfonate

CAS 2695-37-6

EPA’s 2023 records show zero U.S. production of this chemical.

Molecular structure of 2695-37-6 — 1 Na⁺

US productionZero

Import value, 2024$40M

Import volumeCBI

Confidential Business Information. The EPA withholds this volume because publishing it could reveal the reporting company's trade secrets.

Top sourceGermany 22%

At least one company claimed its 2023 production or import volume for this chemical as confidential, so EPA withholds it.

Why supply is unknown

Production is reported production, not a complete census of factories. 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 290410 · basket

EPA reports by year

2023: US production Zero · Imports Confidential
2019: US production Confidential · Imports Confidential

These shares come from HS customs code 290410, which covers 115 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%GermanyIT 20%ItalyCN 14%ChinaBE 11%BelgiumIN 11%India

Spain
Netherlands
Czech Republic
Brazil
Taiwan
Hong Kong

EPA-registered importers (2)

Companies that report making or importing this chemical to the EPA. Registration is US-centric and does not indicate import origin.

Tosoh · JP Japan

Tosoh America

Why It Matters

Sectors

Metals & MiningTextiles

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 2 sectors as 2 functional roles.

•Fixing agent (mordant) in Textiles, apparel, and leather manufacturing (25%)Processing as a reactant
•Anti-scaling agent in Other (75%)Processing—incorporation into formulation, mixture, or reaction product

Vendor Pricing

$0.08/gBLD Pharmatech Co., Limited

CountryUnited States

Pack$82.00 / 1 kg

Purity90%

Vendors10 available

Prices reflect listed pack sizes. Small research packs run far above bulk rates.

9 more vendors

Vendor	Country	$/g	Pack	Purity
BLD Pharmatech GmbH	Germany	$0.08	1 kg	90%
BLD Pharmatech Ltd.	China	$0.08	1 kg	90%
Ambeed, Inc.	United States	$0.08	1 kg	90%
Combi-Blocks, Inc.	United States	$0.25	1 kg	97%
AK Scientific Specialized	United States	$0.28	1 kg	95%
AK Scientific, Inc.	United States	$0.34	1 kg	98%
Sigma-Aldrich (Rush Stock)	Germany	$0.82	500 g	90%
Sigma-Aldrich	Germany	$0.82	500 g	90%
ALFA AESAR	Germany	$0.94	250 g	—

Chemical Identity

CAS2695-37-6

PubChem CID3571582

DTXSIDDTXSID7044635

FormulaC8H7NaO3S

Mol. Weight206.2 g/mol

SMILESC=CC1=CC=C(C=C1)S(=O)(=O)[O-].[Na+]

Data Sources

EPA CompTox (DSSTox) · DTXSID7044635Retrieved 2026-04-06
PubChem · compound 3571582Retrieved 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

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Brief citations

Sodium 4-vinylbenzenesulfonate (CAS 2695-37-6) https://chemicalindependence.com/chemical/2695-37-6/ EPA CompTox (DSSTox): DTXSID7044635. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID7044635 PubChem: 3571582. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/3571582 EPA Chemical Data Reporting: 2695-37-6. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 2695-37-6. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 290410 for CAS 2695-37-6. Reporting year: 2024. https://usatrade.census.gov/