1,3,5-Tribromo-2-(prop-2-en-1-yloxy)benzene

CAS 3278-89-5

Used in 2 industrial sectors tracked by the EPA.

US production370.2K lb

Import value, 2024$59M

Import volumeCBI

Confidential Business Information. The EPA withholds this volume because publishing it could reveal the reporting company's trade secrets.

Top sourceChina 51%

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. 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 290930 · basket

EPA reports by year

2023: US production 370.2K lb · Imports Confidential
2019: US production Confidential · Imports Confidential

These shares come from HS customs code 290930, which covers 119 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 51%ChinaIN 23%IndiaIT 12%ItalyJP 9%JapanCA 2%Canada

Spain
Israel
Netherlands
Taiwan
Germany
Ireland
Switzerland
Ukraine
Mexico
United Kingdom
Australia

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.

Bvpv Styrenics

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.

Lanxess

Why It Matters

Sectors

ConstructionPlastics & 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 2 sectors as 1 functional role.

•Flame retardant in Construction (100%)Processing—incorporation into formulation, mixture, or reaction product
•Flame retardant in Plastics Material and Resin Manufacturing (100%)Processing—incorporation into article

Vendor Pricing

$0.80/gCombi-Blocks, Inc.

CountryUnited States

Pack$80.00 / 100 g

Purity98%

Vendors7 available

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

6 more vendors

Vendor	Country	$/g	Pack	Purity
AstaTech (2 weeks)	United States	$1.13	100 g	95%
Aaron Chemicals LLC	Hong Kong	$3.96	25 g	98%
Angene Chemical	China → Hong Kong	$4.04	25 g	98%
AA BLOCKS (2 weeks)	United States	$5.84	25 g	98%
A2B Chem LLC (2 weeks)	United States	$6.04	25 g	98%
Angene	China → Hong Kong	$4266.67	30 mg	98%

Chemical Identity

CAS3278-89-5

PubChem CID76767

DTXSIDDTXSID3044918

FormulaC9H7Br3O

Mol. Weight370.86 g/mol

SMILESC=CCOC1=C(C=C(C=C1Br)Br)Br

Data Sources

EPA CompTox (DSSTox) · DTXSID3044918Retrieved 2026-04-06
PubChem · compound 76767Retrieved 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

← Back to Dashboard ← Back to Construction

Brief citations

1,3,5-Tribromo-2-(prop-2-en-1-yloxy)benzene (CAS 3278-89-5) https://chemicalindependence.com/chemical/3278-89-5/ EPA CompTox (DSSTox): DTXSID3044918. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID3044918 PubChem: 76767. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/76767 EPA Chemical Data Reporting: 3278-89-5. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 3278-89-5. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 290930 for CAS 3278-89-5. Reporting year: 2024. https://usatrade.census.gov/