Octylisothiazolinone (OIT), 2-n-Octyl-4-Isothiazolin-3-one


Octylisothiazolinone (OIT) is a low-toxicity biocide specifically. The 2-n-Octyl-4-Isothiazolin-3-one is developed for the complete microbiological protection of water-based and solvent-based products against bacterial and fungal spoilage in the wet state.

2-Octyl-4-Isothiazolin-3-One is liquid. It is soluble in organic solvents and slightly soluble in water. 2-Octyl-4-Isothiazolin-3-One has a strong killing effect on mildew and can achieve an ideal mildew-proof effect.

The product has the advantage of broad-spectrum sterilization. It’s both mildew-proof and algae-resistant. Octylisothiazolinone (OIT) is stable under strong ultraviolet rays and acid rain, and the result of the outdoor weather resistance test for five years proves that the product has a good mildewproof effect. 2-Octyl-4-Isothiazolin-3-One does not contain mercury and lead and will not fade or darken the paint due to sulfides.

The disadvantage of this product is that it is water-soluble and easy to be washed away by rain. Therefore, it is not suitable for exterior walls. In addition, it is irritating to the skin.

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Structure Formula:

octylisothiazolinone structure formula


AppearanceAmber liquid
Active content45% or 95%
Specific gravity1.03~1.04 g/cm³
Solvent1 2-propane glycol
Loss on drying0.20% Max.


Octylisothiazolinone is effective against mildew, bacteria, and fungi. The 2-n-Octyl-4-Isothiazolin-3-one is widely used in a variety of industrial applications. Such as water treatment, paper pulp, coating & painting, metal cutting fluid, personal care products, cosmetics, and so on.

2-Octyl-4-Isothiazolin-3-One is effective against mold, bacteria and fungi. 2-Octyl-4-Isothiazolin-3-One can be widely used in coatings, paints, lubricants, shoe polish, leather chemicals, wood products, cultural relics protection and many other products. Uch as water treatment, pulp, coatings and paints, metal cutting fluids, personal care products, cosmetics, etc.

2-Octyl-4-Isothiazolin-3-One has no VOC. Stable under strong light and high temperature. The sterilization is broad-spectrum and efficient. It can effectively prevent bacteria and fungi in plastics.

Packing and Storage:

Octylisothiazolinone is packed in 25 kg or 200 kg plastic drum, or 1000kg IBC.

25kg plastic barrel  200l plastic drum 1000l IBC


2-Octylisothiazol-3(2H)-one, kathonsp70, PANCIL-T, kathon 893, OIT,skanem8.


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