CompoundList
Sign in
In-can and dry-film biocides

Kathon

Also known as Kathon 886, Kathon LX, 3(2H)-Isothiazolone, 5-chloro-2-methyl-, mixt. with 2-methyl-3(2H)-isothiazolone

CAS 55965-84-9Formula C8H9ClN2O2S2Molar mass 264.76 g/molEC 611-341-5
GHS signal word: Danger. Pictograms: Corrosive, Acute toxicity (severe), Hazardous to the environment 13 suppliers listed
Get quotes Compare 13 suppliers
Kathon chemical structure, C8H9ClN2O2S2, CAS 55965-84-9
2D chemical structure

Key facts

What buyers check first

All properties
CAS number
55965-84-9
Formula
C8H9ClN2O2S2
Molar mass
264.76 g/mol
Physical form
Liquid
HS code
293499
Category
In-can and dry-film biocides
Illustrative photo, assorted laboratory chemical bottles and jars on a laboratory bench
Typical packagingIllustrative packaging image, not the actual product

What is Kathon?

Plain description, key identifiers and synonyms

Kathon is a chemical substance with the molecular formula C8H9ClN2O2S2 and a molar mass of 264.76 g/mol. Its CAS registry number is 55965-84-9. The IUPAC name is 5-chloro-2-methyl-1,2-thiazol-3-one, 2-methyl-1,2-thiazol-3-one.

Identifiers

Registry numbers, names and line notations, tap to copy

IUPAC name
5-chloro-2-methyl-1,2-thiazol-3-one, 2-methyl-1,2-thiazol-3-one
CAS number
55965-84-9
EC numbers
611-341-5, 911-418-6, 932-593-5
Molecular formula
C8H9ClN2O2S2
UNII
15O9QS218W
MDL number
MFCD01716911
InChIKey
QYYMDNHUJFIDDQ-UHFFFAOYSA-N
InChI
InChI=1S/C4H4ClNOS.C4H5NOS/c1-6-4(7)2-3(5)8-6;1-5-4(6)2-3-7-5/h2H,1H3;2-3H,1H3
SMILES (canonical and isomeric)
CN1C(=O)C=CS1.CN1C(=O)C=C(S1)Cl

Synonyms

  • Kathon 886
  • Kathon LX
  • 3(2H)-Isothiazolone, 5-chloro-2-methyl-, mixt. with 2-methyl-3(2H)-isothiazolone
  • Kathon 886 biocide
  • Kathon biocide
  • Kathon CG
  • Kathon 886MW
  • Zonen F
  • ProClin 300
  • 2-Methylisothiazol-3(2H)-one compound with 5-chloro-2-methylisothiazol-3(2H)-one(14%in H2O)
  • 2-Methylisothiazol-3(2H)-one compound with 5-chloro-2-methylisothiazol-3(2H)-one
  • 5-chloro-2-methyl-1,2-thiazol-3-one, 2-methyl-1,2-thiazol-3-one
  • Bio-Perge
  • 5-Chloro-2-methyl-3(2H)-isothiazolone mixt. with 2-methyl-3(2H)-isothiazolone
  • Kathon WT
  • Microcide III
  • Somacide RS
  • Legend MK
  • 3(2H)-Isothiazolone, 5-chloro-2-methyl-, mixt. with2-methyl-3(2H)-isothiazoloneOTHER CA INDEX NAMES:3(2H)-Isothiazolone, 2-methyl-, mixt. contg.
  • Kathon CG/ICP II
  • Slaoff 360
  • Kathon 886 W
  • Kathon RH 886
  • MBC 215
  • Tret-O-Lite XC 215
Show all 35 synonyms
  • C8H9ClN2O2S2
  • KKM 43
  • Chloromethylisothiazolinone-methylisothiazolinone Mixture (~10% in water)
  • 2-Methylisothiazol-3(2H)-one compound with 5-chloro-2-methylisothiazol-3(2H)-one (1:1)
  • CMIT/MIT, 14.5% in water
  • 5-chloro-2-methyl-isothiazol-3-one, 2-methylisothiazol-3-one
  • 2-Methylisothiazol-3(2H)-one 5-chloro-2-methylisothiazol-3(2H)-one (1:1) 14% in water
  • 2-Methylisothiazol-3(2H)-onecompoundwith5-chloro-2-methylisothiazol-3(2H)-one(14%inH2O)
  • 2-Methylisothiazol-3(2H)-one compound with 5-chloro-2-methylisothiazol-3(2H)-one(14% in h2o)
  • 5-Chloro-2-methyl-3(2H)-isothiazolone with 2-methyl-3(2H)-isothiazolone, 14% aqueous solution

Physical and chemical properties

Measured values and descriptors computed from the structure

Physical and chemical properties

Measured values, check the supplier specification for your grade

Physical form
Liquidexp.

Values vary by grade. Ask suppliers for the COA or TDS of the batch you buy.

Computed descriptors

Calculated from the structure, useful for screening and formulation

Molecular weight
264.76 g/molcalc.
Exact mass
263.9794 Dacalc.
LogP (octanol/water)
1.55calc.
Topological polar surface area
44 Ųcalc.
Hydrogen bond donors
0calc.
Hydrogen bond acceptors
4calc.
Rotatable bonds
0calc.
Heavy atoms
15calc.
Rings
2calc.
Aromatic rings
2calc.
Fraction sp3 carbons
0.25calc.
Formal charge
0calc.
Stereocentres
0calc.
Components
2calc.
Lipinski rule of five
Passes (0 violations)calc.

Calculated for screening. Confirm critical figures with the supplier.

Murcko scaffold

The ring system that remains when every side chain is removed

Murcko scaffold of this chemical, O=c1ccs[nH]1

O=c1ccs[nH]1

1 ring, 6 atoms, the Isothiazolin-3-one ring system.

97 other chemicals share this scaffold

Safety and hazards

GHS classification summary, not a safety data sheet

GHS signal word
Danger
GHS05: Corrosive
Corrosive
GHS06: Acute toxicity (severe)
Acute toxicity (severe)
GHS09: Hazardous to the environment
Hazardous to the environment

Hazard statements

  • H301Toxic if swallowed.
  • H310Fatal in contact with skin.
  • H314Causes severe skin burns and eye damage.
  • H317May cause an allergic skin reaction.
  • H318Causes serious eye damage.
  • H330Fatal if inhaled.
  • H400Very toxic to aquatic life.
  • H410Very toxic to aquatic life with long lasting effects.
Precautionary statements (30)
  • P260Do not breathe dust, fume, gas, mist, vapours or spray.
  • P261Avoid breathing dust, fume, gas, mist, vapours or spray.
  • P262Do not get in eyes, on skin, or on clothing.
  • P264Wash skin thoroughly after handling.
  • P264 + P265Wash skin thoroughly after handling. Do not touch eyes.
  • P270Do not eat, drink or smoke when using this product.
  • P271Use only outdoors or in a well-ventilated area.
  • P272Contaminated work clothing should not be allowed out of the workplace.
  • P273Avoid release to the environment.
  • P280Wear protective gloves, protective clothing, eye protection and face protection.
  • P284In case of inadequate ventilation wear respiratory protection.
  • P301 + P316If swallowed: Get emergency medical help immediately.
  • P301 + P330 + P331If swallowed: Rinse mouth. Do not induce vomiting.
  • P302 + P352If on skin: Wash with plenty of water.
  • P302 + P361 + P354If on skin: Take off immediately all contaminated clothing. Immediately rinse with water for several minutes.
  • P304 + P340If inhaled: Remove person to fresh air and keep comfortable for breathing.
  • P305 + P354 + P338If in eyes: Immediately rinse with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
  • P316Get emergency medical help immediately.
  • P317Get medical help.
  • P320Specific treatment is urgent (see supplemental first aid instructions on the label).
  • P321Specific treatment (see supplemental first aid instructions on the label).
  • P330Rinse mouth.
  • P333 + P317If skin irritation or rash occurs: Get medical help.
  • P361 + P364Take off immediately all contaminated clothing. And wash it before reuse.
  • P362 + P364Take off contaminated clothing. And wash it before reuse.
  • P363Wash contaminated clothing before reuse.
  • P391Collect spillage.
  • P403 + P233Store in a well-ventilated place. Keep container tightly closed.
  • P405Store locked up.
  • P501Dispose of contents and container in accordance with local regulations.

GHS classification summary, not a safety data sheet (SDS). Classifications can differ by supplier, grade and concentration. Always check the supplier's SDS.

Full safety data and first aid

Kathon suppliers

Sponsored listings first, then the documented ranking: membership, verification, replies, completeness, freshness and ratings

All 13 suppliers
13 of 13 offers

Suppliers marked Unclaimed profile have not claimed their profile yet. They are not verified by CompoundList, their offers are price on request and details may have changed, so please confirm them with the supplier. Company representatives can claim a profile with a business email on the company's own website domain. Our team verifies each claim and sends the result by email.

Where suppliers are based

13 suppliers in 8 countries

Send one request to many suppliers

Choose up to 10 suppliers or let us match your request. Compare quotes side by side, free.

Choose suppliersPost a request

Kathon price

Indicative price range per kg from live supplier offers

No published prices right now

Suppliers quote this chemical on request. Send one free request and compare quotes side by side.

Get latest price

Uses and applications

What the substance is used for, by industry and function

Consumer uses: Other.

Pharmacological actions

  • Mutagens

Functional uses

  • Fragrance
  • Preservative

Regulatory status

Inventories, regulations and trade controls that list this substance

Europe

  • EU harmonised classification (CLP Annex VI)
    Index no: 613-167-00-5

HS code and trade data

Customs classification and reported world trade statistics

Global trade

World import and export statistics for the HS code Kathon is traded under.

HS 2934.99Indicative HS code

Nucleic acids and their salts, other heterocyclic compounds, not elsewhere classified in heading 2934

World exports in 2024
$26.7B
+15.0% vs 2023, imports $26.3B
2019 to 2024
Top exporters
  1. Ireland26.3%
  2. China15.7%
  3. Singapore10.3%
Top importers
  1. United States24.5%
  2. Germany23.1%
  3. Japan4.5%
Reported customs values in USD, not prices.Full trade data

The HS code shown for Kathon is indicative (it was assigned by structure rules). Confirm the classification with your customs broker before shipping.

Frequently asked questions

Quick answers about Kathon, based on the data on this page

What is Kathon?

Kathon is a chemical substance with the molecular formula C8H9ClN2O2S2 and a molar mass of 264.76 g/mol. Its CAS registry number is 55965-84-9. The IUPAC name is 5-chloro-2-methyl-1,2-thiazol-3-one, 2-methyl-1,2-thiazol-3-one.

What is the CAS number of Kathon?

The CAS registry number of Kathon is 55965-84-9.

What is the molecular formula and weight of Kathon?

The molecular formula of Kathon is C8H9ClN2O2S2 and its molar mass is 264.76 g/mol.

What is Kathon used for?

Consumer uses: Other.

Is Kathon hazardous?

Kathon carries the GHS signal word "Danger". Main hazards: toxic if swallowed, fatal in contact with skin, causes severe skin burns and eye damage. This summary is not an SDS, always read the supplier safety data sheet.

What is the HS code of Kathon?

Kathon is usually classified under HS code 293499 (Nucleic acids and their salts, whether or not chemically defined, other heterocyclic…). This is indicative, confirm it with your customs broker before shipping.

Where can I buy Kathon?

CompoundList lists 13 suppliers of Kathon in China, United States, Canada, Cape Verde and 4 more. Send one free request to get and compare quotes. Your contact details stay private until you accept a quote.

Where can I buy Kathon in India?

1 supplier in India list Kathon on CompoundList. Filter the suppliers list by country and send a request to compare prices, grades and delivery times.

What is the price of Kathon?

Suppliers quote Kathon on request because prices depend on grade, purity, quantity and destination. A free request on CompoundList gets you several quotes to compare.

Guides for buyers

Practical guides that help when you source, ship or handle Kathon

Get quotes for Kathon

Post one free request with your grade, quantity and destination. Matching suppliers send quotes you can compare side by side.
Post a request Sell Kathon
Data last updated 7 Oct 2026. Details may have changed, please confirm them with the supplier. Report an error on this page
Embed this structure on your websiteShow code

Paste this code into your page to show the 2D structure of Kathon with a 3D view, its CAS number where known and a link back to this page. Free to use with the link kept.

<iframe src="https://www.compoundlist.com/embed/structure/kathon-55965-84-9" title="Kathon structure on CompoundList" width="360" height="420" style="border:1px solid #E7E2DA;border-radius:12px;max-width:100%" loading="lazy" referrerpolicy="strict-origin-when-cross-origin"></iframe>
Preview the embed

Explore more in In-can and dry-film biocides or HS code 293499

13 suppliers
Free quotes, contact stays private
Get quotes