1,2,3,4-Butanetetracarboxylic acid, 1,2,3,4-tetrakis(1,2,2,6,6-pentamethyl-4-piperidinyl) ester

CAS 91788-83-9

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

US productionZero

Import value, 2024$1.3B

Import volumeCBI

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

Top sourceChina 32%

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 293339 · basket

EPA reports by year

2023: US production Zero · Imports Confidential
2019: US production Zero · Imports 228.5K lb

These shares come from HS customs code 293339, which covers 397 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 32%ChinaIN 15%IndiaDE 10%GermanyBE 9%BelgiumCH 8%Switzerland

Taiwan
Ukraine
Sweden
Argentina
Canada
Finland
Malta
Israel
Netherlands
Denmark
United Arab Emirates
Mexico
Brunei
Slovakia
Australia
South Africa
Poland
Latvia
Lithuania
Estonia
Slovenia
Czech Republic
Croatia
Hong Kong

EPA-registered importers (3)

Companies that report making or importing this chemical to the EPA. Registration is US-centric and does not indicate import origin.

Eneos Materials America

Mitsubishi Corporation (Americas)

Mitsubishi International Polymertrade

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

Chemical Identity

CAS91788-83-9

PubChem CID14549311

DTXSIDDTXSID70869085

FormulaC48H86N4O8

Mol. Weight847.2 g/mol

SMILESCC1(CC(CC(N1C)(C)C)OC(=O)CC(C(CC(=O)OC2CC(N(C(C2)(C)C)C)(C)C)C(=O)OC3CC(N(C(C3)(C)C)C)(C)C)C(=O)OC4CC(N(C(C4)(C)C)C)(C)C)C

Data Sources

EPA CompTox (DSSTox) · DTXSID70869085Retrieved 2026-04-06
PubChem · compound 14549311Retrieved 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

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Brief citations

1,2,3,4-Butanetetracarboxylic acid, 1,2,3,4-tetrakis(1,2,2,6,6-pentamethyl-4-piperidinyl) ester (CAS 91788-83-9) https://chemicalindependence.com/chemical/91788-83-9/ EPA CompTox (DSSTox): DTXSID70869085. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID70869085 PubChem: 14549311. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/14549311 EPA Chemical Data Reporting: 91788-83-9. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 91788-83-9. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 293339 for CAS 91788-83-9. Reporting year: 2024. https://usatrade.census.gov/