1,4-Butane sultone

CAS 1633-83-6

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

Molecular structure of 1633-83-6
US productionZero
Import value, 2024$6.4B
Import volumeCBI
Top sourceSingapore 36%

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 293499 · basket

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

These shares come from HS customs code 293499, which covers 575 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries
SG 36%SingaporeIE 23%IrelandCN 11%ChinaCH 6%SwitzerlandIN 5%India
EPA-registered importers (1)
3M

Why It Matters

Sectors
Core Chemicals
Downstream UsesNot recorded
FDA Shortage Status
No FDA shortage records

Industrial Uses

  • •Intermediate in All Other Basic Organic Chemical Manufacturing (100%)Processing as a reactant

Vendor Pricing

$0.05/gA2B Chem LLC
CountryUnited States
Pack$52.00 / 1 kg
Purity98%
Vendors23 available

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

Chemical Identity

CAS1633-83-6
PubChem CID15411
DTXSIDDTXSID4061836
FormulaC4H8O3S
Mol. Weight136.17 g/mol
SMILESC1CCS(=O)(=O)OC1

Data Sources

Brief citations

1,4-Butane sultone (CAS 1633-83-6) https://chemicalindependence.com/chemical/1633-83-6/ EPA CompTox (DSSTox): DTXSID4061836. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID4061836 PubChem: 15411. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/15411 EPA Chemical Data Reporting: 1633-83-6. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 1633-83-6. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 293499 for CAS 1633-83-6. Reporting year: 2024. https://usatrade.census.gov/