5-Chloro-2-methyl-4-isothiazolin-3-one

5-Chloro-2-methyl-4-isothiazolin-3-one

CAS Number
26172-55-4
Molecular Formula
C4H4ClNOS
Purity
5-Chloro-2-methyl-4-isothiazolin-3-one 98% purity

About 5-Chloro-2-methyl-4-isothiazolin-3-one

5-Chloro-2-methyl-4-isothiazolin-3-one (CAS 26172-55-4) is a critical antimicrobial preservative widely utilized in the United States for water-based industrial applications, where 98% Agrochemical industry purity is essential for North American manufacturers seeking to stabilize paints, coatings, and adhesives against...

Synonyms

  • 5-chloro-2-methyl-4-isothiazolin-3-one
  • 5-chloro-2-methyl-4-isothiazolin-3-one hydrochloride
  • 5-chloro-2-methylisothiazolin-3-one
  • 5-chloro-N-methylisothiazolone
  • 5243-K-Cg
View all

5-Chloro-2-methyl-4-isothiazolin-3-one Specifications

CAS Number
26172-55-4
Molecular Formula
C4H4ClNOS
Molecular Weight
149.60 g/mol
IUPAC Name
5-chloro-2-methyl-1,2-thiazol-3-one
Canonical SMILES
CN1C(=O)C=C(S1)Cl
InChI Key
DHNRXBZYEKSXIM-UHFFFAOYSA-N
InChI
InChI=1S/C4H4ClNOS/c1-6-4(7)2-3(5)8-6/h2H,1H3
HSN No
29341000
melting_point
54-55 °C
solubility
Solubility in g/100 mL solvent: water, infinite
density
For a mixture of 5-chloro-2-methyl-3(2H)-isothiazolone and 2-methyl-3(2H)-isothiazolone: Clear light amber liquid; density: 1.256 - 1.296 g/mL at 20-25 °C; viscosity: 11.4 cP at 25.7 °C
logP
log Kow = 0.401 at 24 °C
Molecular Weight
149.60 g/mol
Purity
5-Chloro-2-methyl-4-isothiazolin-3-one 98% purity

Antimicrobial Preservative

A powerful biocide and preservative widely used to inhibit the growth of bacteria, yeast, and fungi in water-based products, including cosmetics, hygiene products, paints, detergents, and industrial cooling systems

Chemical Intermediate

A versatile heterocyclic building block and halogenated heterocycle utilized in organic synthesis and the development of complex bioactive small molecules

Industrial Biocide

A critical active ingredient employed in specialized applications such as paper coatings, cutting oils, metal machining fluids, and hydraulic fracturing fluids to prevent microbial spoilage

Diagnostic Allergen

A standardized chemical allergen used as an active ingredient in epicutaneous patch tests for the diagnosis of allergic contact dermatitis.

  1. 5-chloro-2-methyl-4-isothiazolin-3-one
  2. 5-chloro-2-methyl-4-isothiazolin-3-one hydrochloride
  3. 5-chloro-2-methylisothiazolin-3-one
  4. 5-chloro-N-methylisothiazolone
  5. 5243-K-Cg

Minimum Order Quantity

25 kg (evaluation) · 1 MT (commercial)

Lead Time

3 – 5 weeks estimated

Delivery Terms

FOB*

Packaging

20 L pails, 200 L HDPE drums, 1000 L IBC

US Availability

US Facility Inventory

Documentation

US SDS · COA · TDS · Specification sheet

US Regulatory & Quality Information

TSCA status*

US SDS / HazCom*

GHS classification*

ISO 9001:2015 site*

DOT shipping classification*

FDA status*

EPA status*

California Prop 65*

Reliable US supply chain

Regulatory compliance

On-time delivery

Technical expert support

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