Polyquaternary Ammonium Compounds
Barquat PQ2
Barquat® PQ/PQ-2

The Barquat® PQ and PQ-2 products are non-foaming cationic polymeric quaternary ammonium algaecides. These products act as dispersant agents and aid in water clarification as they assist in the coagulation of small particles. The Barquat® PQ product has a 60% concentration in polyquat, whereas the Barquat® PQ-2 product has a 50% concentration.

Barquat® PQ & PQ-2 show a high degree of efficacy against algae when compared to other algaecides. However, for optimal control in cooling water, Lonza recommends a supplementary oxidizer such as our Dantobrom® RW products.

At recommended use concentrations the Barquat® PQ and PQ-2 products are compatible with cationic and non-ionic surfactants.

Additional advantages:

  • Effective against planktonic and sessile algae
  • Provides water clarification and biodispersion
  • Helps to reduce unpleasant odours
  • Helps to reduce halogen demand and filter clogging
  • Stable in hard water and over a broad pH and temperature range
  • Non foaming and simple-to-use and formulate
  • Synergy with halogens
  • Test kit available therefore easy to monitor
  • Product packaging size: available in drums or IBC’s

Barquat® PQ/PQ-2 Product Information Sheet English

Barquat® PQ/PQ-2 Product Information Sheet French