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Kopthione Cu (Copper Pyrithione)

Kopthione Cu Powder is a light green crystalline type fine powder. It exhibits pronounced growth inhibiting activity against a broad spectrum of both gram negative and gram positive bacteria. Inhibits the growth of fungi, both yeast and mould. It is insoluble in water and inhibits the growth of algae. It is used as a marine antifouling agent. It is used as a marine antifouling agent. It is used in marine paints when a more gelling resistant antifoulant is required.

Product Information:

Composition: Micronised fine powder

Appearance: Olive green coloured powder

Odour: Nearly odourless to mild

Copper Pyrithione: 95% min

Solubility: Sparingly soluble in water 4.93 mg/l at 20 C; 6.11 mg/l at 30 C. Slightly improved solubility in organic solvents.

Stability in product: Light stable, stable in the pH range 6-8

Application :

Copper Pyrithione Powder is highly effective antifouling agent for the control of hard fouling marine organisms such as seaweed and bacterial and diatom slimes.

CPT is mainly used in antifouling marine paint, building coating, metal processing and pesticide fields.

CPT and its like products have tremendous potential and broad space in pesticide field with properties of high efficiency; environmental protection, hypo toxicity and broad spectrum.

It can be used in antifouling coatings to be applied on the underwater part of ship and boat hulls or static marine structures.

Antimicrobial Efficacy:

Kopthione Cu Powder possesses a broad spectrum of antifungal and antialgal activity against all fungi and algae including following relevant organisms. This product can restrain and sterilize eight moulds, five bacteria, as well as two yeast fungis which are distillery yeast and bakers yeast. The various micro-organisms are as follows.

Name of Microorganism:


Bacillus subtilis

Bacillus megaterium

Escherichia Coli

Pseudomonas fluorescens

Staphylococcus aureus

Saccharomyces cerevisiae

Klocckeria Janke


Aspergillus niger

Aspergillus flavus

Aspergillus versicolor

Penicillium citrinum


Cladosporium herbarium

Trichoderma viride

Chaetomium globosum


Copper Pyrithione is intended to be used as a co-biocide (booster biocide) by both professional and non-professional users in antifouling products against marine fouling species. It is meant to be effective against soft fouling organisms, so its function is to increase the efficacy of the product in order to remove the most problematic fouling organisms.

Functional Activity: Algaecide, bactericide and Fungicide.

Guideline application: Antifouling paint in marine and yacht applications, controls algae in fishnet by coating.


Broad spectrum antimicrobial

Excellent heat and pH stability

No VOC's

Low water solubility = low leach rate = long term protection

Extensively tested toxicology and environmental profits

Normal addition levels are in the range 2 to 4% by weight

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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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