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Tetrabromobisphenol A-bis(2,3-dibromopropyl ether)

CAS 21850-44-2

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

Molecular structure of 21850-44-2
US productionCBI
Import value, 2024$59M
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. 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 290930 · basket

EPA reports by year
2023
US production Confidential · 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
CN 51%ChinaIN 23%IndiaIT 12%ItalyJP 9%JapanCA 2%Canada
Domestic parents -- activity not disclosed (2)
3M
Icl Specialty Products North America

Why It Matters

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

Industrial Uses

Used in 5 sectors as 1 functional role.

  • •Flame retardant in Custom Compounding of Purchased Resins (25%)Processing—incorporation into formulation, mixture, or reaction product
  • •Flame retardant in Plastics Material and Resin Manufacturing (25%)Processing—incorporation into formulation, mixture, or reaction product
  • •Flame retardant in Plastics Product Manufacturing (25%)Processing—incorporation into formulation, mixture, or reaction product
  • •Flame retardant in All Other Chemical Product and Preparation Manufacturing (25%)Processing—incorporation into formulation, mixture, or reaction product
  • •Flame retardant in Adhesive ManufacturingProcessing—incorporation into formulation, mixture, or reaction product

Vendor Pricing

$0.08/gA2B Chem LLC
CountryUnited States
Pack$40.00 / 500 g
Purity95%
Vendors14 available

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

13 more vendors
VendorCountry$/gPackPurity
AA BLOCKSUnited States$0.09500 g95%
Aaron Chemicals LLCHong Kong$0.11500 g95%
Angene ChemicalChina → Hong Kong$0.12500 g95%
BLD Pharmatech GmbHGermany$0.131 kg95%
BLD Pharmatech Ltd.China$0.131 kg95%
BLD Pharmatech Co., LimitedUnited States$0.151 kg95%
Ambeed, Inc.United States$0.151 kg95%
Combi-Blocks, Inc.United States$0.251 kg95%
AK Scientific SpecializedUnited States$0.26500 g95%
AK Scientific, Inc.United States$0.36500 g98%
Angene International LimitedUnited States$0.62500 g98%
AstaTech (2 weeks)United States$0.94500 g98%
AngeneChina → Hong Kong$4266.6730 mg95%

Chemical Identity

CAS21850-44-2
PubChem CID62753
DTXSIDDTXSID3032129
FormulaC21H20Br8O2
Mol. Weight943.6 g/mol
SMILESCC(C)(C1=CC(=C(C(=C1)Br)OCC(CBr)Br)Br)C2=CC(=C(C(=C2)Br)OCC(CBr)Br)Br

Data Sources

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Brief citations

Tetrabromobisphenol A-bis(2,3-dibromopropyl ether) (CAS 21850-44-2) https://chemicalindependence.com/chemical/21850-44-2/ EPA CompTox (DSSTox): DTXSID3032129. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID3032129 PubChem: 62753. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/62753 EPA Chemical Data Reporting: 21850-44-2. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 21850-44-2. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 290930 for CAS 21850-44-2. Reporting year: 2024. https://usatrade.census.gov/