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Product Description

Isothiazolinones (CMIT/MIT)

CAS No.  
26172-55-4, 2682-20-4 
Molecular weight:  
Structural Formula:


Isothiazolinones is composed of 5-chloro-2-methyl-4-thiazoline-3-ketone (CMI) and 2-methyl-4-thiazoline-3-ketone (MI). The bactericidal effect of Isothiazolinones is carried out through breaking the bond between bacteria and algae protein. When contacted with microbes, Isothiazolinones can quickly inhibit their growth, thus leading to the death of these microbes. Isothiazolinones has strong inhibition and biocidal effects on ordinary bacteria, fungi, and alga, and has many advantages such as high biocidal efficiency, good degradation, no residual, safety in operation, good compatibleness, good stabilization, low cost in operation.

Isothiazolinones can mix with chlorine and most cation, anion, and non-ionic surfactants. When used at high dosage, its biosludge stripping effect is excellent.

Isothiazolinones are a kind of fungicidal with properties of broad-spectrum, high efficiency, low toxicity, and non-oxidative, it is the ideal biocidal in industrial circulating cool water system and in wastewater treatment in the oilfield, papermaking, pesticide, cutting oil, leather, detergent, and cosmetics, etc.




Grade I

Grade II


Amber transparent liquid

Light yellow or light green transparent liquid

Active content %



pH (as it)



Density (20℃)g/cm3



CMI/MI (wt %)



Notes: 2%, 4%, and 8%, or any concentration can be supplied on demands.


When used as sludge stripper for grade II, the dosage of 150-300mg/L is preferred, when used as biocides, the dosage of 80-100mg/L is preferred, and charges every 3-7 days. No used together with oxidative fungicidal such as chlorine, and no used in cooling water system containing sulfur. When used together with the quaternary amine, the effect will be better. When used as an industrial fungicide, the dosage of 0.05-0.4% is preferred.

Package and Storage:

200L plastic drum,IBC(1000L),customers’ requirement. Storage for ten months in a shady room and dry place.

Safety Protection:

Corrosive, Avoid contact with eye and skin, Wear splash resistant safety goggles and rubber glories. once contacted, flush with water.

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