1,2-Dimethyl-4-nitrobenzene

CAS 99-51-4

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$44M

Import volumeZero

Top sourcePortugal 61%

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. 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 290420 · basket

EPA reports by year

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

These shares come from HS customs code 290420, which covers 43 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).

PT 61%PortugalPL 17%PolandIN 10%IndiaKR 7%South KoreaCN 5%China

Japan
Taiwan

EPA-registered manufacturers (2)

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

Basf Se · DE Germany

Basf

Why It Matters

Sectors

Agriculture

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 Pesticide, Fertilizer, and Other Agricultural Chemical ManufacturingProcessing as a reactant

Vendor Pricing

$0.27/gAK Scientific Specialized

CountryUnited States

Pack$27.00 / 100 g

Purity95%

Vendors7 available

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

6 more vendors

Vendor	Country	$/g	Pack	Purity
ALFA AESAR	Germany	$0.31	500 g	99%
AK Scientific, Inc.	United States	$0.36	100 g	98%
Sigma-Aldrich (Rush Stock)	Germany	$0.66	100 g	99%
Sigma-Aldrich	Germany	$0.66	100 g	99%
Labotest KG	Germany	$217.80	5000 mg	90%
TimTec, LLC (back-ordered)	United States	$32000.00	15 mg	94%

Chemical Identity

CAS99-51-4

PubChem CID7440

DTXSIDDTXSID2025133

FormulaC8H9NO2

Mol. Weight151.16 g/mol

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

Data Sources

EPA CompTox (DSSTox) · DTXSID2025133Retrieved 2026-04-06
PubChem · compound 7440Retrieved 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

1,2-Dimethyl-4-nitrobenzene (CAS 99-51-4) https://chemicalindependence.com/chemical/99-51-4/ EPA CompTox (DSSTox): DTXSID2025133. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID2025133 PubChem: 7440. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/7440 EPA Chemical Data Reporting: 99-51-4. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 99-51-4. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 290420 for CAS 99-51-4. Reporting year: 2024. https://usatrade.census.gov/