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3(2H)-Isothiazolone, 4,5-dichloro-2-octyl-

CAS 64359-81-5

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

Molecular structure of 64359-81-5
US productionZero
Import value, 2024$447M
Import volume38.8K lb
Import dependency100%
Top sourceChina 31%

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.

3(2H)-Isothiazolone, 4,5-dichloro-2-octyl- · US import value by year
$1.5B2013$1.9B2021$447M2024$385M2025

2013: $1.5B · Peak 2021: $1.9B · 2024: $447M · 2025: $385M

Where It Comes From

Customs basis: HS 293410 · basket

EPA reports by year
2023
US production Zero · Imports 38.8K lb

These shares come from HS customs code 293410, which covers 83 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries
CN 31%ChinaDE 25%GermanyMX 19%MexicoJP 13%JapanIN 5%India

Why It Matters

Sectors
ConstructionPaints & Coatings
Downstream UsesNot recorded
FDA Shortage Status
No FDA shortage records

Industrial Uses

Used in 2 sectors as 1 functional role.

  • •Preservative in Paint and Coating Manufacturing (99%)Processing—incorporation into formulation, mixture, or reaction product
  • •Preservative in Adhesive Manufacturing (1%)Processing—incorporation into formulation, mixture, or reaction product

Vendor Pricing

$0.10/gAaron Chemicals LLC
CountryHong Kong
Pack$51.00 / 500 g
Purity98%
Vendors19 available

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

18 more vendors
VendorCountry$/gPackPurity
Angene ChemicalChina → Hong Kong$0.11500 g98%
A2B Chem LLCUnited States$0.14100 g98%
BLD Pharmatech Ltd.China$0.161 kg98%
AA BLOCKSUnited States$0.17100 g98%
ChemsceneUnited States$0.19500 g—
BLD Pharmatech Co., LimitedUnited States$0.21500 g98%
Ambeed, Inc.United States$0.21500 g98%
Combi-Blocks, Inc.United States$0.251 kg97%
SynthonixUnited States$0.29100 g95%
AK Scientific SpecializedUnited States$0.30500 g95%
AK Scientific, Inc.United States$0.40500 g98%
Angene International LimitedUnited States$0.53500 g95%
BLD Pharmatech GmbHGermany$0.7225 g98%
Fulfilled by MolportLatvia$0.805 g98%
Biopharma PEG Scientific Inc.United States$2.64100 g99%
MedChemExpress MCESweden$6.295 g99.87%
AstaTech (2 weeks)United States$8.005 g97%
AngeneChina → Hong Kong$4266.6730 mg98%

Chemical Identity

CAS64359-81-5
PubChem CIDNot recorded
DTXSIDDTXSID5032315
FormulaC11H17Cl2NOS
Mol. Weight282.22 g/mol
SMILESCCCCCCCCN1SC(Cl)=C(Cl)C1=O

Data Sources

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Brief citations

3(2H)-Isothiazolone, 4,5-dichloro-2-octyl- (CAS 64359-81-5) https://chemicalindependence.com/chemical/64359-81-5/ EPA TSCA Inventory: CAS 64359-81-5. Retrieved 2026-04-29. https://www.epa.gov/tsca-inventory EPA Chemical Data Reporting: 64359-81-5. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 64359-81-5. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 293410 for CAS 64359-81-5. Reporting year: 2024. https://usatrade.census.gov/