2-Methyl-5-nitrobenzenesulfonic acid

CAS 121-03-9

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

US productionZero

Import value, 2024$9M

Import volumeCBI

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

Top sourceChina 53%

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 290499 · basket

EPA reports by year

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

These shares come from HS customs code 290499, which covers 112 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).

CN 53%ChinaIN 30%IndiaUA 4%UkraineTW 4%TaiwanIT 4%Italy

United Kingdom
Japan
Canada
Czech Republic
South Korea
Lithuania
Latvia
Russia

Domestic parents -- activity not disclosed (2)

EPA records name a US company for this chemical but do not disclose whether the company made it here or imported it.

Archroma U.S

Basf

EPA-registered importers (1)

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

Liberty Specialty Chemicals

Why It Matters

Sectors

Textiles

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

•Intermediate in Synthetic Dye and Pigment Manufacturing (100%)Processing as a reactant

Vendor Pricing

$0.14/gAngene Chemical

CountryChina (registered: Hong Kong)

Pack$72.00 / 500 g

Purity82%

Vendors12 available

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

11 more vendors

Vendor	Country	$/g	Pack	Purity
Aaron Chemicals LLC	Hong Kong	$0.24	500 g	82%
Combi-Blocks, Inc.	United States	$0.25	1 kg	98%
A2B Chem LLC	United States	$0.27	1 kg	98%
AA BLOCKS	United States	$0.28	1 kg	98%
Ambeed, Inc.	United States	$0.58	100 g	85%
Angene International Limited	United States	$1.28	500 g	85%
Synthonix	United States	$2.52	25 g	95%
Labotest KG	Germany	$217.80	5000 mg	90%
ChemDiv, Inc.	United States	$4070.00	100 mg	90%
Angene	China → Hong Kong	$4266.67	30 mg	82%
TimTec, LLC (back-ordered)	United States	$32000.00	15 mg	94%

Chemical Identity

CAS121-03-9

PubChem CID8458

DTXSIDDTXSID4026975

FormulaC7H7NO5S

Mol. Weight217.2 g/mol

SMILESCC1=C(C=C(C=C1)[N+](=O)[O-])S(=O)(=O)O

Data Sources

EPA CompTox (DSSTox) · DTXSID4026975Retrieved 2026-04-06
PubChem · compound 8458Retrieved 2026-04-06
EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04
EPA Chemical Data ReportingReporting year: 2019 · Retrieved 2026-10-04
US Census international tradeReporting year: 2024 · Retrieved 2026-10-04

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Brief citations

2-Methyl-5-nitrobenzenesulfonic acid (CAS 121-03-9) https://chemicalindependence.com/chemical/121-03-9/ EPA CompTox (DSSTox): DTXSID4026975. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID4026975 PubChem: 8458. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/8458 EPA Chemical Data Reporting: 121-03-9. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 121-03-9. Reporting year: 2019. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 290499 for CAS 121-03-9. Reporting year: 2024. https://usatrade.census.gov/