With options available globally for use in biofouling control, anaerobic microbial control, and fluid preservation, the comprehensive AQUCAR™ Water Treatment Microbiocides portfolio includes key chemistries (link to chemistries) such as glutaraldehyde, glut/quat blends, DBNPA, bronopol, OPP and dimethyl-oxazolidine.

AQUCAR™ DC 4P25 Water Treatment Microbiocidefor Industrial Cooling Water Systems

The newest member of our microbicide family, AQUCAR™ DC 4P25 Water Treatment Microbiocide, was developed to provide a solution to persistent algal contamination in industrial cooling waters. AQUCAR DC 4P25 contains 4,5-dichloro-2-n-octyl-4-isothiazolin-3-one (DCOIT) and its unique blend of efficacy and ability to rapidly biodegrade makes AQUCAR DC 4P25 Water Treatment Microbiocide the perfect solution in cooling water applications.

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Used In:

  • Recirculating cooling towers
  • Closed-loop cooling water systems
  • Air washers


  •  Extremely effective against algae, cyanobacteria, mold and yeast at low use rates
  •  Also effective against bacteria
  •  Clear liquid microemulsion
  •  Chemically stable active ingredient
  •  Completely soluble at use concentrations
  •  Compatible with oxidizing biocides and other commonly used additives

Typical Properties

Footnote:  Please Note That Not All Products Are Registered In All Regions For All Applications. Please Contact Your Local Dow Representative For Detailed Technical Information Applicable To Your Individual Situation.; Use Biocides Safely. Always Read The Label And Product Information Before Use.


  • North America