3a,4,7,7a-Tetrahydroindene

CAS 3048-65-5

Used in 1 industrial sector tracked by the EPA.

US production5.9M lb

Import value, 2024$90M

Import volume643.8K lb

Import dependency10%

Top sourceJapan 21%

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.

Where It Comes From

Customs basis: HS 290219 · basket

EPA reports by year

2023: US production 5.9M lb · Imports 643.8K lb
2019: US production Confidential · Imports Confidential

These shares come from HS customs code 290219, which covers 108 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 21%JapanBR 12%BrazilTW 12%TaiwanKR 11%South KoreaDE 9%Germany

Russia
United Kingdom
Indonesia
South Africa
Ukraine
Madagascar
Hungary
Hong Kong
Czech Republic
Israel

EPA-registered manufacturers (1)

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

Nippon Chemical Texas

Domestic parents -- activity not disclosed (1)

EPA records name a US company for this chemical but do not disclose whether the company made it here or imported it.

Neville Chemical

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.

Ergon Chemicals

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

Used in 1 sector as 2 functional roles.

•Adhesion/cohesion promoter in Plastics Material and Resin Manufacturing (100%)Processing as a reactant
•Intermediate in Plastics Material and Resin Manufacturing (100%)Processing as a reactant

Vendor Pricing

$2.40/gCombi-Blocks, Inc.

CountryUnited States

Pack$240.00 / 100 g

Purity98%

Vendors3 available

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

2 more vendors

Vendor	Country	$/g	Pack	Purity
A2B Chem LLC	United States	$2.59	100 g	98%
AA BLOCKS	United States	$2.74	100 g	98%

Chemical Identity

CAS3048-65-5

PubChem CID62475

DTXSIDDTXSID0027515

FormulaC9H12

Mol. Weight120.19 g/mol

SMILESC1C=CCC2C1CC=C2

Data Sources

EPA CompTox (DSSTox) · DTXSID0027515Retrieved 2026-04-06
PubChem · compound 62475Retrieved 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

3a,4,7,7a-Tetrahydroindene (CAS 3048-65-5) https://chemicalindependence.com/chemical/3048-65-5/ EPA CompTox (DSSTox): DTXSID0027515. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID0027515 PubChem: 62475. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/62475 EPA Chemical Data Reporting: 3048-65-5. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 3048-65-5. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 290219 for CAS 3048-65-5. Reporting year: 2024. https://usatrade.census.gov/