2-(2-Hydroxyethoxy)ethyl 2-hydroxypropyl 3,4,5,6-tetrabromophthalate

CAS 20566-35-2

EPA’s 2023 records show zero U.S. production of this chemical.

US productionZero

Import value, 2024$316M

Import volumeCBI

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

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. 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 Zero · 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

Country of origin for US imports, from Census customs data (2024).

KR 19%South KoreaCN 19%ChinaIN 18%IndiaES 13%SpainCA 9%Canada

Netherlands
Malaysia
Colombia
Switzerland
Turkey
Germany
Peru
Brazil
Sweden
Belgium
Denmark
Czech Republic
Ukraine
Hong Kong

Domestic parents -- activity not disclosed (2)

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

Huntsman

Tri-Iso

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

•Flame retardant in Plastics Product Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product

Chemical Identity

CAS20566-35-2

PubChem CID89352

DTXSIDDTXSID60864948

FormulaC15H16Br4O7

Mol. Weight627.9 g/mol

SMILESCC(COC(=O)C1=C(C(=C(C(=C1Br)Br)Br)Br)C(=O)OCCOCCO)O

Data Sources

EPA CompTox (DSSTox) · DTXSID60864948Retrieved 2026-04-06
PubChem · compound 89352Retrieved 2026-04-06
EPA Chemical Data ReportingReporting year: 2023 · Retrieved 2026-10-04
EPA Chemical Data ReportingReporting year: 2019 · Retrieved 2026-10-04
US Census international tradeReporting year: 2024 · Retrieved 2026-10-04

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Brief citations

2-(2-Hydroxyethoxy)ethyl 2-hydroxypropyl 3,4,5,6-tetrabromophthalate (CAS 20566-35-2) https://chemicalindependence.com/chemical/20566-35-2/ EPA CompTox (DSSTox): DTXSID60864948. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID60864948 PubChem: 89352. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/89352 EPA Chemical Data Reporting: 20566-35-2. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 20566-35-2. Reporting year: 2019. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 291739 for CAS 20566-35-2. Reporting year: 2024. https://usatrade.census.gov/