THPS Organic Biocide plus Surfactant for Closed & Cooling Water Systems 0502

This product has been replaced by Accepta 2302

Please contact us with your application requirements for an alternative or check out our list of Non-Oxidising Biocides.


Accepta 0502 is a highly effective organic biocide formulation based on THPS which also contains a powerful anionic surfactant designed to penetrate biofilms.

Accepta 0502 has been developed to enhance the rapid kill characteristics and broad spectrum activity in highly contaminated cooling water systems and closed systems where algae and slime dispersion are important objectives.

Accepta 0502 has low foam characteristics and maintains full biocidal efficacy under both acid and alkaline pH conditions.

Accepta 0502 provides quick kill times (often within one hour) against aerobic and anaerobic bacteria, Legionella pneumophila, pseudomonas bacteria, algae and fungi. It is also particularly effective against sulphate reducing bacteria, a major source of pipeline corrosion.

Accepta 0502 has a low toxicity and is readily biodegradable. It can also be deactivated under controlled conditions.

Product Benefits

  • High performance THPS based biocide with anionic surfactant.
  • Very quick kill times (often within one hour).
  • Kills bacteria, algae and fungi.
  • Kills Legionella pneumophila.
  • Kills Pseudomonas bacteria.
  • Kills sulphate reducing bacteria.
  • Includes anionic surfactant for excellent biofilm penetration.
  • Excellent slime dispersant.
  • Will control microbiological corrosion caused by sulphate reducing bacteria.
  • Low toxicity and readily biodegradable.

Product Properties

State: Solution
Appearance: Clear colourless
Density: 1.0 – 1.17
pH @ 1%: 6.0 – 7.0
Solubility in water: Miscible with all water types

*Full details of the product properties are available in the Safety Data Sheet. See below.

Application & Dosage Information

Accepta 0502 can be added at any point where there is good mixing with the system water.

NOTE – Do not inject at the same point as the scale inhibitor product as precipitation may result

Accepta 0502 can be dosed proportionally or via a timer. Contact Accepta technical support for further information.

Cooling Water Systems

In cooling water systems the standard maintenance dose of Accepta 0502 is 150 – 200 ppm on a weekly basis. This concentration will achieve effective Legionella control (laboratory test data is available if required).

An alternate biocide is recommended to prevent the development of resistant organisms.

Closed Systems

In closed systems the dosage of Accepta 0502 will vary according to system conditions and problems being experienced. Contact Accepta technical support for further information.

It is always advisable to carry out a ‘Control Of Substances Hazardous to Health’ (COSHH) assessment before use.

Safety, Storage & Handling

For full details concerning safety precautions, storage and handling procedures for this product please refer to the latest Safety Data Sheet. To request the latest MSDS for this product please fill out the form below.

    Additional information

    Weight 25 kg