2-Methyl-3-isothiazolone hydrochloride
CAS 26172-54-3
3(2H)-Isothiazolone, 2-methyl-, hydrochloride (1:1)
EPA and Census publish no US supply data for this chemical.
US productionNot reported
Top sourceNo public record
This chemical is listed as active in US commerce, but no company reported it to EPA’s survey for 2019 or 2023. Sites may have made or imported less than the threshold amount, or none.
Why supply is unknownWhere It Comes From
EPA and Census publish no US supply data for this chemical.
Why It Matters
No EPA sector or FDA product records name a use for this chemical.
Vendor Pricing
$0.79/gAaron Chemicals LLC
CountryHong Kong
Pack$394.00 / 500 g
Purity99%
Vendors16 available
Prices reflect listed pack sizes. Small research packs run far above bulk rates.
15 more vendors
| Vendor | Country Supplier country. Where available, shows shipping origin. When the supplier ships from a different country than where they are registered, both are shown. Most suppliers show registration country only. | $/g | Pack | Purity |
|---|---|---|---|---|
| Angene Chemical | China → Hong Kong | $0.84 | 500 g | 99% |
| A2B Chem LLC | United States | $1.76 | 25 g | 99% |
| AA BLOCKS | United States | $2.20 | 25 g | 99% |
| Apollo Scientific UK | United Kingdom | $2.48 | 25 g | 99% |
| Combi-Blocks, Inc. | United States | $2.95 | 100 g | 95% |
| MedChemExpress MCE | Sweden | $3.25 | 100 g | 99.93% |
| AK Scientific, Inc. | United States | $4.72 | 25 g | 99% |
| MedKoo Biosciences, Inc | United States | $26.00 | 25 g | 98% |
| AstaTech (2 weeks) | United States | $28.60 | 5 g | 95% |
| TargetMol Chemicals | China → United States | $29.00 | 1 g | 99.05% |
| Angene International Limited | United States | $42.20 | 5 g | 98% |
| Sigma-Aldrich (Rush Stock) | Germany | $83.91 | 5 g | 99% |
| Sigma-Aldrich | Germany | $83.91 | 5 g | 99% |
| Life Chemicals Inc. | Ukraine → Canada | $136.00 | 500 mg | 95% |
| Angene | China → Hong Kong | $4266.67 | 30 mg | 99% |
Chemical Identity
CAS26172-54-3
PubChem CIDNot recorded
DTXSIDDTXSID1040740
FormulaC4H6ClNOS
Mol. Weight151.61 g/mol
SMILESCl.CN1SC=CC1=O
Data Sources
- EPA TSCA InventoryRetrieved 2026-10-04
Brief citations
2-Methyl-3-isothiazolone hydrochloride (CAS 26172-54-3) https://chemicalindependence.com/chemical/26172-54-3/ EPA TSCA Inventory: CAS 26172-54-3. Retrieved 2026-10-04. https://www.epa.gov/tsca-inventory