5-Chloro-2-methyl-4-isothiazolin-3-one
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- $15 - $4989
- Product name: 5-Chloro-2-methyl-4-isothiazolin-3-one
- CAS: 26172-55-4
- MF: C4H4ClNOS
- MW: 149.6
- EINECS:247-500-7
- MDL Number:MFCD00792550
- Synonyms:5-CHLORO-2-METHYLISOTHIAZOLINONE;5-CHLORO-2-METHYL-2,3-DIHYDROISOTHIAZOL-3-ONE;METHYL/CHLOROMETHYLISOTHIAZOLINONE;2-METHYL-5-CHLOROISOTHIAZOLIN-3-ONE;5-CHLORO-2-METHYLISOTHIAZOLIN-3-ONE;KATHON886F;KATHONFP;CHLOROMETHYLISOTHIAZOLINE
81 prices
Selected condition:
Brand
- aablocks
- Activate Scientific
- AHH
- AK Scientific
- American Custom Chemicals Corporation
- Apolloscientific
- Biosynth
- ChemScene
- Crysdot
- Medical Isotopes, Inc.
- Sigma-Aldrich
- SynQuest Laboratories
- TRC
- Usbiological
Package
- 1mg
- 2mg
- 2.5mg
- 5mg
- 10mg
- 25mg
- 1ml
- 1g
- 5g
- 10g
- 0.025kg
- 25g
- 25ML
- 0.05kg
- 50g
- 0.1kg
- 100g
- 100ml
- 0.25kg
- 250ML
- 500g
- 500ml
- 0.5kg
- 1l
- Manufactureraablocks
- Product numberAA003820
- Product description5-Chloro-2-Methyl-4-Isothiazolin-3-One ActiveIngredient>14%CMI/MI2.5-4.0
- Packaging1g
- Price$18
- Updated2026-05-28
- Buy
- Manufactureraablocks
- Product numberAA003820
- Product description5-Chloro-2-Methyl-4-Isothiazolin-3-One ActiveIngredient>14%CMI/MI2.5-4.0
- Packaging5g
- Price$38
- Updated2026-05-28
- Buy
- Manufactureraablocks
- Product numberAA003820
- Product description5-Chloro-2-Methyl-4-Isothiazolin-3-One ActiveIngredient>14%CMI/MI2.5-4.0
- Packaging10g
- Price$63
- Updated2026-05-28
- Buy
- Manufactureraablocks
- Product numberAA003820
- Product description5-Chloro-2-Methyl-4-Isothiazolin-3-One ActiveIngredient>14%CMI/MI2.5-4.0
- Packaging25g
- Price$107
- Updated2026-05-28
- Buy
- Manufactureraablocks
- Product numberAA003820
- Product description5-Chloro-2-Methyl-4-Isothiazolin-3-One 68%
- Packaging100g
- Price$285
- Updated2026-05-28
- Buy
- Manufactureraablocks
- Product numberAA003820
- Product description5-Chloro-2-Methyl-4-Isothiazolin-3-One 68%
- Packaging500g
- Price$840
- Updated2026-05-28
- Buy
- ManufacturerActivate Scientific
- Product numberAS42728-A
- Product description5-Chloro-2-methyl-4-isothiazolin-3-one 75%
- Packaging25g
- Price$258
- Updated2026-06-04
- Buy
- ManufacturerActivate Scientific
- Product numberAS42728-B
- Product description5-Chloro-2-methyl-4-isothiazolin-3-one (>14% solution in water) 95%
- Packaging5g
- Price$65
- Updated2026-06-04
- Buy
- ManufacturerActivate Scientific
- Product numberAS42728-B
- Product description5-Chloro-2-methyl-4-isothiazolin-3-one (>14% solution in water) 95%
- Packaging25g
- Price$198
- Updated2026-06-04
- Buy
- ManufacturerActivate Scientific
- Product numberAS42728-A
- Product description5-Chloro-2-methyl-4-isothiazolin-3-one 75%
- Packaging1g
- Price$44
- Updated2026-06-04
- Buy
- ManufacturerActivate Scientific
- Product numberAS42728-B
- Product description5-Chloro-2-methyl-4-isothiazolin-3-one (>14% solution in water) 95%
- Packaging1g
- Price$33
- Updated2026-06-04
- Buy
- ManufacturerActivate Scientific
- Product numberAS42728-A
- Product description5-Chloro-2-methyl-4-isothiazolin-3-one 75%
- Packaging5g
- Price$87
- Updated2026-06-04
- Buy
- ManufacturerAHH
- Product numberMT-05815
- Product description5-Chloro-2-methyl-4-isothiazolin-3-one 98%
- Packaging100ml
- Price$428
- Updated2021-12-16
- Buy
- ManufacturerAHH
- Product numberMT-05815
- Product description5-Chloro-2-methyl-4-isothiazolin-3-one 97%
- Packaging100ml
- Price$428
- Updated2026-05-25
- Buy
- ManufacturerAHH
- Product numberMT-05815
- Product description5-Chloro-2-methyl-4-isothiazolin-3-one 97%
- Packaging100ml
- Price$428
- Updated2026-05-26
- Buy
- ManufacturerAK Scientific
- Product numberE547
- Product description5-Chloro-2-methyl-4-isothiazolin-3-one ActiveIngredient>14%,CMI/MI2.5-4.0
- Packaging100g
- Price$250
- Updated2026-06-04
- Buy
| Manufacturer | Product number | Product description | Packaging | Price | Updated | Buy |
|---|---|---|---|---|---|---|
| aablocks | AA003820 | 5-Chloro-2-Methyl-4-Isothiazolin-3-One ActiveIngredient>14%CMI/MI2.5-4.0 | 1g | $18 | 2026-05-28 | Buy |
| aablocks | AA003820 | 5-Chloro-2-Methyl-4-Isothiazolin-3-One ActiveIngredient>14%CMI/MI2.5-4.0 | 5g | $38 | 2026-05-28 | Buy |
| aablocks | AA003820 | 5-Chloro-2-Methyl-4-Isothiazolin-3-One ActiveIngredient>14%CMI/MI2.5-4.0 | 10g | $63 | 2026-05-28 | Buy |
| aablocks | AA003820 | 5-Chloro-2-Methyl-4-Isothiazolin-3-One ActiveIngredient>14%CMI/MI2.5-4.0 | 25g | $107 | 2026-05-28 | Buy |
| aablocks | AA003820 | 5-Chloro-2-Methyl-4-Isothiazolin-3-One 68% | 100g | $285 | 2026-05-28 | Buy |
| aablocks | AA003820 | 5-Chloro-2-Methyl-4-Isothiazolin-3-One 68% | 500g | $840 | 2026-05-28 | Buy |
| Activate Scientific | AS42728-A | 5-Chloro-2-methyl-4-isothiazolin-3-one 75% | 25g | $258 | 2026-06-04 | Buy |
| Activate Scientific | AS42728-B | 5-Chloro-2-methyl-4-isothiazolin-3-one (>14% solution in water) 95% | 5g | $65 | 2026-06-04 | Buy |
| Activate Scientific | AS42728-B | 5-Chloro-2-methyl-4-isothiazolin-3-one (>14% solution in water) 95% | 25g | $198 | 2026-06-04 | Buy |
| Activate Scientific | AS42728-A | 5-Chloro-2-methyl-4-isothiazolin-3-one 75% | 1g | $44 | 2026-06-04 | Buy |
| Activate Scientific | AS42728-B | 5-Chloro-2-methyl-4-isothiazolin-3-one (>14% solution in water) 95% | 1g | $33 | 2026-06-04 | Buy |
| Activate Scientific | AS42728-A | 5-Chloro-2-methyl-4-isothiazolin-3-one 75% | 5g | $87 | 2026-06-04 | Buy |
| AHH | MT-05815 | 5-Chloro-2-methyl-4-isothiazolin-3-one 98% | 100ml | $428 | 2021-12-16 | Buy |
| AHH | MT-05815 | 5-Chloro-2-methyl-4-isothiazolin-3-one 97% | 100ml | $428 | 2026-05-25 | Buy |
| AHH | MT-05815 | 5-Chloro-2-methyl-4-isothiazolin-3-one 97% | 100ml | $428 | 2026-05-26 | Buy |
| AK Scientific | E547 | 5-Chloro-2-methyl-4-isothiazolin-3-one ActiveIngredient>14%,CMI/MI2.5-4.0 | 100g | $250 | 2026-06-04 | Buy |
Properties
Melting point :42-45C
Boiling point :109.7°C
Density :1.25 (14% aq.)
refractive index :n20/D 1.378
storage temp. :Refrigerator
solubility :Chloroform (Slightly), DMSO (Slightly), Methanol (Slightly, Heated)
form :Liquid
pka :-4.06±0.40(Predicted)
color :White
Odor :Pungent aromatic odor
Stability :Stable. Incompatible with strong oxidizing agents.
Major Application :pharmaceutical (small molecule)
Cosmetics Ingredients Functions :PRESERVATIVE
Cosmetic Ingredient Review (CIR) :5-Chloro-2-methyl-4-isothiazolin-3-one (26172-55-4)
InChI :InChI=1S/C4H4ClNOS/c1-6-4(7)2-3(5)8-6/h2H,1H3
InChIKey :DHNRXBZYEKSXIM-UHFFFAOYSA-N
SMILES :S1C(Cl)=CC(=O)N1C
LogP :0.240 (est)
CAS DataBase Reference :26172-55-4(CAS DataBase Reference)
NIST Chemistry Reference :5-Chloro-2-methyl-3(2h)-isothiazolone(26172-55-4)
EPA Substance Registry System :5-Chloro-2-methyl-4-isothiazolin-3-one (26172-55-4)
Boiling point :109.7°C
Density :1.25 (14% aq.)
refractive index :n
storage temp. :Refrigerator
solubility :Chloroform (Slightly), DMSO (Slightly), Methanol (Slightly, Heated)
form :Liquid
pka :-4.06±0.40(Predicted)
color :White
Odor :Pungent aromatic odor
Stability :Stable. Incompatible with strong oxidizing agents.
Major Application :pharmaceutical (small molecule)
Cosmetics Ingredients Functions :PRESERVATIVE
Cosmetic Ingredient Review (CIR) :5-Chloro-2-methyl-4-isothiazolin-3-one (26172-55-4)
InChI :InChI=1S/C4H4ClNOS/c1-6-4(7)2-3(5)8-6/h2H,1H3
InChIKey :DHNRXBZYEKSXIM-UHFFFAOYSA-N
SMILES :S1C(Cl)=CC(=O)N1C
LogP :0.240 (est)
CAS DataBase Reference :26172-55-4(CAS DataBase Reference)
NIST Chemistry Reference :5-Chloro-2-methyl-3(2h)-isothiazolone(26172-55-4)
EPA Substance Registry System :5-Chloro-2-methyl-4-isothiazolin-3-one (26172-55-4)
Safety Information
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Description
5-chloro-2-methyl-3-Isothiazolone (MCI) is an isothiazolinone-derived biocide used for controlling microbial growth in water-containing solutions. It is effective against Gram-positive and Gram-negative bacteria, yeast, and fungi. This preservative is known as Kathon? when used at a 3:1 ratio with methylisothiazolinone (MI). Recent reports have shown both MCI/MI and MI by itself can elicit contact sensitization.More related product prices
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Suppliers and manufacturers
Taicang Puyuan Pharmaceutical Co., Ltd.
CMIT / MIT
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Wuhan Fortuna Chemical Co., Ltd
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Suzhou Genemill Biotechnology Co.,Ltd
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