Pentanoic acid, 4,4'-(1,2-diazenediyl)bis[4-cyano-

CAS 2638-94-0

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

US productionZero

Import value, 2024$50M

Import volume48.5K lb

Import dependency100%

Top sourceIndonesia 23%

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.

Pentanoic acid, 4,4'-(1,2-diazenediyl)bis[4-cyano- · US import value by year

2013: $61M · Peak 2022: $82M · 2024: $50M · 2025: $43M

Where It Comes From

Customs basis: HS 292700 · basket

EPA reports by year

2023: US production Zero · Imports 48.5K lb

These shares come from HS customs code 292700, which covers 89 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).

ID 23%IndonesiaJP 18%JapanMX 16%MexicoCN 13%ChinaKR 8%South Korea

Germany
United Kingdom
Switzerland
Belgium
Latvia
Ukraine

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.

Fujifilm Wako Chemicals U.S.A

Why It Matters

Sectors

Plastics & Rubber

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

•Polymerization promoter in Plastics Material and Resin Manufacturing (100%)Processing as a reactant

Chemical Identity

CAS2638-94-0

PubChem CIDNot recorded

DTXSIDDTXSID3044629

FormulaC12H16N4O4

Mol. Weight280.284 g/mol

SMILESCC(CCC(O)=O)(N=NC(C)(CCC(O)=O)C#N)C#N

Data Sources

EPA TSCA InventoryRetrieved 2026-04-29
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

Pentanoic acid, 4,4'-(1,2-diazenediyl)bis[4-cyano- (CAS 2638-94-0) https://chemicalindependence.com/chemical/2638-94-0/ EPA TSCA Inventory: CAS 2638-94-0. Retrieved 2026-04-29. https://www.epa.gov/tsca-inventory EPA Chemical Data Reporting: 2638-94-0. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 2638-94-0. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 292700 for CAS 2638-94-0. Reporting year: 2024. https://usatrade.census.gov/