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Benzene, 1,1'-sulfonylbis[3,5-dibromo-4-(2,3-dibromopropoxy)-

CAS 42757-55-1

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

Molecular structure of 42757-55-1
US productionCBI
Import value, 2024$760M
Top sourceChina 33%

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 293090 · basket

EPA reports by year
2023
US production Confidential · Imports Confidential

These shares come from HS customs code 293090, which covers 418 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries
CN 33%ChinaES 14%SpainCH 9%SwitzerlandIT 7%ItalyIN 7%India

Why It Matters

Sectors
Plastics & Rubber
Downstream UsesNot recorded
FDA Shortage Status
No FDA shortage records

Industrial Uses

  • •Flame retardant in Plastics Material and Resin ManufacturingProcessing—incorporation into formulation, mixture, or reaction product

Vendor Pricing

$178.00/gCombi-Blocks, Inc.
CountryUnited States
Pack$890.00 / 5 g
Purity95%
Vendors10 available

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

9 more vendors
VendorCountry$/gPackPurity
A2B Chem LLCUnited States$188.805 g95%
BLD Pharmatech Ltd.China$198.005 g95%
Angene ChemicalChina → Hong Kong$216.001 g95%
AA BLOCKSUnited States$221.405 g95%
Aaron Chemicals LLCHong Kong$234.001 g95%
BLD Pharmatech Co., LimitedUnited States$235.001 g95%
BLD Pharmatech GmbHGermany$235.001 g95%
Ambeed, Inc.United States$235.001 g95%
AstaTech (2 weeks)United States$604.001 g95%

Chemical Identity

CAS42757-55-1
PubChem CIDNot recorded
DTXSIDDTXSID5044942
FormulaC18H14Br8O4S
Mol. Weight965.6 g/mol
SMILESBrCC(Br)COC1=C(Br)C=C(C=C1Br)S(=O)(=O)C1=CC(Br)=C(OCC(Br)CBr)C(Br)=C1

Data Sources

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Brief citations

Benzene, 1,1'-sulfonylbis[3,5-dibromo-4-(2,3-dibromopropoxy)- (CAS 42757-55-1) https://chemicalindependence.com/chemical/42757-55-1/ EPA TSCA Inventory: CAS 42757-55-1. Retrieved 2026-04-29. https://www.epa.gov/tsca-inventory EPA Chemical Data Reporting: 42757-55-1. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 42757-55-1. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 293090 for CAS 42757-55-1. Reporting year: 2024. https://usatrade.census.gov/