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Carbonodithioic acid, O-butyl ester, sodium salt (1:1)

CAS 141-33-3

Companies reported imports and no US production of this chemical to EPA for 2023.

Molecular structure of 141-33-3
1 Na⁺
US productionZero
Import value, 2024$760M
Import volume900 lb
Import dependency100%
Top sourceChina 33%

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.

Carbonodithioic acid, O-butyl ester, sodium salt (1:1) · US import value by year
$743M2013$984M2022$760M2024$751M2025

2013: $743M · Peak 2022: $984M · 2024: $760M · 2025: $751M

Where It Comes From

Customs basis: HS 293090 · basket

EPA reports by year
2023
US production Zero · Imports 900 lb

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
Domestic parents -- activity not disclosed (1)
Americas Mining
EPA-registered importers (1)
Brenntag

Why It Matters

Sectors
Metals & Mining
Downstream UsesNot recorded
FDA Shortage Status
No FDA shortage records

Chemical Identity

CAS141-33-3
PubChem CIDNot recorded
DTXSIDDTXSID9059705
FormulaC5H9NaOS2
Mol. Weight172.24 g/mol
SMILES[Na+].CCCCOC([S-])=S

Data Sources

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Brief citations

Carbonodithioic acid, O-butyl ester, sodium salt (1:1) (CAS 141-33-3) https://chemicalindependence.com/chemical/141-33-3/ EPA TSCA Inventory: CAS 141-33-3. Retrieved 2026-04-29. https://www.epa.gov/tsca-inventory EPA Chemical Data Reporting: 141-33-3. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 141-33-3. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 293090 for CAS 141-33-3. Reporting year: 2024. https://usatrade.census.gov/