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1,6-Hexanediamine, N1,N6-bis(3-phenyl-2-propen-1-ylidene)-

CAS 140-73-8

Molecular structure of 140-73-8
US productionNot reported
Import value, 2024$240M
Top sourceChina 37%

This chemical is listed as active in US commerce, but no company reported it to EPA’s survey for 2019 or 2023. Sites may have made or imported less than the threshold amount, or none.

Why supply is unknown

Production is reported production, not a complete census of factories. Import value and source-country shares describe a shared customs category, not a separate chemical measurement.

Where It Comes From

Customs basis: HS 292529 · basket

These shares come from HS customs code 292529, which covers 64 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries
CN 37%ChinaDE 19%GermanyES 9%SpainIT 8%ItalyID 8%Indonesia

Why It Matters

No EPA sector or FDA product records name a use for this chemical.

Chemical Identity

CAS140-73-8
PubChem CIDNot recorded
DTXSIDDTXSID2059697
FormulaC24H28N2
Mol. Weight344.502 g/mol
SMILESC(CCCN=CC=CC1=CC=CC=C1)CCN=CC=CC1=CC=CC=C1

Data Sources

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Brief citations

1,6-Hexanediamine, N1,N6-bis(3-phenyl-2-propen-1-ylidene)- (CAS 140-73-8) https://chemicalindependence.com/chemical/140-73-8/ EPA TSCA Inventory: CAS 140-73-8. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory US Census international trade: HS 292529 for CAS 140-73-8. Reporting year: 2024. https://usatrade.census.gov/