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4,5,6,7-Tetrabromo-1,3-Isobenzofurandione

CAS 632-79-1

U.S. production volumes are classified as confidential business information.

Molecular structure of 632-79-1
US productionCBI
Import value, 2024$316M
Top sourceSouth Korea 19%

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. US production volume is confidential. 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 291739 · basket

EPA reports by year
2023
US production Confidential · Imports Confidential
2019
US production Confidential · Imports Confidential

These shares come from HS customs code 291739, which covers 103 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries
KR 19%South KoreaCN 19%ChinaIN 18%IndiaES 13%SpainCA 9%Canada
EPA-registered manufacturers (1)
Lanxess
Domestic parents -- activity not disclosed (3)
Albemarle
Teknor Apex
The Chemical
EPA-registered importers (2)
Orbia Advance Corp S A B De C V · MX Mexico
Alphagary

Why It Matters

Sectors
ConstructionPlastics & RubberCore Chemicals
Downstream UsesNot recorded
FDA Shortage Status
No FDA shortage records

Industrial Uses

Used in 3 sectors as 2 functional roles.

  • •Intermediate in All Other Basic Organic Chemical Manufacturing (100%)Processing as a reactant
  • •Flame retardant in Plastics Material and Resin Manufacturing (22%)Processing as a reactant
  • •Flame retardant in ConstructionProcessing—incorporation into formulation, mixture, or reaction product

Vendor Pricing

$0.07/gAaron Chemicals LLC
CountryHong Kong
Pack$35.00 / 500 g
Purity98%
Vendors21 available

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

20 more vendors
VendorCountry$/gPackPurity
Angene ChemicalChina → Hong Kong$0.08500 g98%
ChemsceneUnited States$0.081 kg—
BLD Pharmatech GmbHGermany$0.081 kg98%
BLD Pharmatech Ltd.China$0.081 kg98%
AK Scientific SpecializedUnited States$0.081 kg95%
A2B Chem LLCUnited States$0.09500 g95%
AA BLOCKSUnited States$0.11500 g95%
BLD Pharmatech Co., LimitedUnited States$0.111 kg98%
Ambeed, Inc.United States$0.111 kg98%
AK Scientific, Inc.United States$0.111 kg98%
Combi-Blocks, Inc.United States$0.251 kg95%
Angene International LimitedUnited States$0.27500 g98%
Fluorochem EUGermany$0.3425 g95%
Fluorochem UKUnited Kingdom$0.3425 g95%
ALFA AESARGermany$0.36500 g98%
Sigma-Aldrich (Rush Stock)Germany$0.73100 g98%
Sigma-AldrichGermany$0.73100 g98%
AstaTech (2 weeks)United States$7.205 g95%
Otava, Ltd.Ukraine$460.00250 mg95%
AngeneChina → Hong Kong$4266.6730 mg98%

Chemical Identity

CAS632-79-1
PubChem CID12443
DTXSIDDTXSID6026084
FormulaC8Br4O3
Mol. Weight463.7 g/mol
SMILESC12=C(C(=C(C(=C1Br)Br)Br)Br)C(=O)OC2=O

Data Sources

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Brief citations

4,5,6,7-Tetrabromo-1,3-Isobenzofurandione (CAS 632-79-1) https://chemicalindependence.com/chemical/632-79-1/ EPA CompTox (DSSTox): DTXSID6026084. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID6026084 PubChem: 12443. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/12443 EPA Chemical Data Reporting: 632-79-1. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 632-79-1. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 291739 for CAS 632-79-1. Reporting year: 2024. https://usatrade.census.gov/