3,3'-Diaminobenzidine

CAS 91-95-2

Companies reported imports and no US production of this chemical to EPA for 2023.

US productionZero

Import value, 2024$84M

Import volume140.5K lb

Import dependency100%

Top sourceJapan 31%

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.

3,3'-Diaminobenzidine · US import value by year

2013: $115M · Peak 2022: $148M · 2024: $84M · 2025: $96M

Where It Comes From

Customs basis: HS 292159 · basket

EPA reports by year

2023: US production Zero · Imports 140.5K lb
2019: US production Zero · Imports 140.7K lb

These shares come from HS customs code 292159, which covers 51 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).

JP 31%JapanIN 26%IndiaCN 21%ChinaCH 13%SwitzerlandBE 4%Belgium

United Kingdom
South Korea
Canada
Italy
Ukraine
Netherlands

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.

Pht International

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 All Other Basic Organic Chemical Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product

Vendor Pricing

$0.29/gFluorochem UK

CountryUnited Kingdom

Pack$7.15 / 25 g

Purity97%

Vendors19 available

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

18 more vendors

Vendor	Country	$/g	Pack	Purity
Aaron Chemicals LLC	Hong Kong	$0.48	100 g	—
Angene Chemical	China → Hong Kong	$0.50	100 g	99%
A2B Chem LLC	United States	$1.04	500 g	98%
AA BLOCKS	United States	$1.16	500 g	98%
Combi-Blocks, Inc.	United States	$1.46	500 g	95%
Ambeed, Inc.	United States	$1.46	500 g	98%
AK Scientific Specialized	United States	$1.95	100 g	95%
AstaTech, Inc	United States	$2.08	100 g	95%
AK Scientific, Inc.	United States	$2.68	100 g	98%
Angene International Limited	United States	$3.35	100 g	95%
Apollo Scientific UK	United Kingdom	$4.00	10 g	—
Sigma-Aldrich (Rush Stock)	Germany	$7.79	25 g	97%
Sigma-Aldrich	Germany	$7.79	25 g	97%
ALFA AESAR	Germany	$8.78	25 g	99%
Labotest KG	Germany	$453.00	1000 mg	90%
ChemBridge Corporation	Kazakhstan	$1860.00	100 mg	90%
Angene	China → Hong Kong	$4266.67	30 mg	99%
TimTec, LLC	United States	$14666.67	30 mg	90%

Chemical Identity

CAS91-95-2

PubChem CID7071

DTXSIDDTXSID2036827

FormulaC12H14N4

Mol. Weight214.27 g/mol

SMILESC1=CC(=C(C=C1C2=CC(=C(C=C2)N)N)N)N

Data Sources

EPA CompTox (DSSTox) · DTXSID2036827Retrieved 2026-04-06
PubChem · compound 7071Retrieved 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

3,3'-Diaminobenzidine (CAS 91-95-2) https://chemicalindependence.com/chemical/91-95-2/ EPA CompTox (DSSTox): DTXSID2036827. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID2036827 PubChem: 7071. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/7071 EPA Chemical Data Reporting: 91-95-2. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 91-95-2. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 292159 for CAS 91-95-2. Reporting year: 2024. https://usatrade.census.gov/