4-Ethoxyaniline

CAS 156-43-4

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$64M

Top sourceChina 52%

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 292229 · basket

EPA reports by year

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

These shares come from HS customs code 292229, which covers 84 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 52%ChinaJP 25%JapanIN 18%IndiaIT 3%ItalyKR 1%South Korea

United Kingdom
Ukraine
Canada
Switzerland
Ireland
Netherlands
Israel
Singapore
Latvia
Hong Kong
Belgium

Why It Matters

Sectors

Defense

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

Vendor Pricing

$0.09/gA2B Chem LLC

CountryUnited States

Pack$45.00 / 500 g

Purity98%

Vendors16 available

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

15 more vendors

Vendor	Country	$/g	Pack	Purity
AA BLOCKS	United States	$0.11	500 g	98%
Sigma-Aldrich (Rush Stock)	Germany	$0.20	500 g	98%
Sigma-Aldrich	Germany	$0.20	500 g	98%
Combi-Blocks, Inc.	United States	$0.30	500 g	98%
AK Scientific Specialized	United States	$0.33	500 g	95%
AK Scientific, Inc.	United States	$0.45	500 g	98%
AstaTech, Inc	United States	$0.83	100 g	98%
Apollo Scientific UK	United Kingdom	$1.12	25 g	98%
Fluorochem UK	United Kingdom	$1.60	25 g	95%
HTS Biochemie Innovationen	Germany	$120.00	10 g	95%
Labotest KG	Germany	$217.80	5000 mg	90%
Otava, Ltd.	Ukraine	$460.00	250 mg	95%
Key Organics Ltd.	United Kingdom	$740.00	100 mg	95%
Vitas M Chemical Limited	Hong Kong	$4020.00	50 mg	90%
TimTec, LLC (back-ordered)	United States	$32000.00	15 mg	94%

Chemical Identity

CAS156-43-4

PubChem CID9076

DTXSIDDTXSID0025864

FormulaC8H11NO

Mol. Weight137.18 g/mol

SMILESCCOC1=CC=C(C=C1)N

Data Sources

EPA CompTox (DSSTox) · DTXSID0025864Retrieved 2026-04-06
PubChem · compound 9076Retrieved 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

4-Ethoxyaniline (CAS 156-43-4) https://chemicalindependence.com/chemical/156-43-4/ EPA CompTox (DSSTox): DTXSID0025864. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID0025864 PubChem: 9076. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/9076 EPA Chemical Data Reporting: 156-43-4. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 156-43-4. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 292229 for CAS 156-43-4. Reporting year: 2024. https://usatrade.census.gov/