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Kopthione Zn (Zinc Pyrithione Powder)

Kopthione Zn powder is an off-white colour, micronized, industrial grade powder.

It exhibits a significant growth inhibiting activity against a broad spectrum of both gram negative and gram positive bacteria besides bacteria, fungi, yeast and mold. Its negligible solubility in water makes it preferred biocide in soft fouling marine paint applications segment.

Product Information:

Composition:Micronised powder of Zinc Pyrithione (Zinc 2-pyridinethiol-1-oxide)

Appearance:Off white to beige coloured powder

Odour:Nearly odourless to mild

Zinc Pyrithione:97% min

Molecular Formula: C10H8N2O2S2Zn

Density:1.8106 at 22.50C

Stability in product:Light stable, stable in pH range 3-10


As antifungal agent in soft fouling marine paints,

As antifungal agent in sealants, caulks, grouts and patching compounds, flooring adhesives, roofing, coated fabrics, wall covering and leather cloth

As antifungal agent in flexible films, foils and sheet, rigid film, sheet extrusion and injection moulding, shoe uppers and liners, rubber vulcanisations and tyres.


A broad spectrum wet state and dry film fungicide and algaecide to protect plastics , sealants, solvent and water borne textile coatings , wood coatings, lacquers, stains and emulsion paints from fungal and algal growth besides exhibiting good bacteriostatic properties.

Antimicrobial Efficacy:

Kopthione Zn Powder possesses a broad spectrum of antifungal and antialgal activity against all fungi and algae following relevant organisms.

Name of Microorganism:


Escherichia Coli

Micrococcus luteus

Proteus Vulgaris

Pseudomonas aeruginosa


Candida albicans

Saccharomyces cerevisiae


Lynbyaba sp



Nostoc commune

Pleurococcus sp.

Scenedesmus sp.

Anabaena sp.


Trebouxia sp.


Alternaria alternate

Aspergillus niger


Aureobasidium pullulans

Chaetomium globosum

Cladosporium sp.

Fusarium sp.

Pacillomyces sp.

Addition and compatibility:

Hydrolytically stable between pH 4 and 8.5 Below pH 3.5 conversions to Pyrithione occur. In alkaline solutions conversion to soluble alkali salts occurs.

Transchelation in coatings occurs in the presence of heavy metal ions. Even traces of the corresponding chelates can cause a noticeable discolouration, foremost the iron and copper complexes.

Sensitive to strong oxidizing and reducing agents and light.

Photolytically stable in pigmented coatings.

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Kumar Organic Products Limited

Corporate Address : 819/C, 13th Cross, 7th Block, Near JSS College Circle, Jayanagar, Bangalore, Karnataka, India. – 560082.

Reg. Office : Usha Krishna Towers, Plot 36-B, Road No.3 & 5, Jigani Industrial Area, Anekal Taluk Bangalore -560105, Karnataka.

CIN: U85110KA1991PLC012095

Email: kop@kumarorganic.net

+91-80-41425832, 41525960

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