Nitrite Corrosion Inhibitor with Biocide & Indicator – 2531

This product has been replaced by Accepta 2336


Accepta 2531 is a high performance water treatment corrosion inhibitor scientifically formulated for the protection of closed circuits, low and medium pressure hot water systems and chilled water systems.

Accepta 2531 comprises a superior blend of sodium nitrite, sodium borate, sodium hydroxide, polymers and azole is the ideal choice for corrosion protection in water systems containing steel and ‘yellow metal’ components.

In addition Accepta 2531 contains an essential biocide and an inbuilt indicator dye for improved monitoring and control.

Product Benefits

  • High performance nitrite based liquid corrosion inhibitor
  • Suitable for use in low and medium pressure hot water systems
  • Suitable for use in chilled water systems
  • Excellent corrosion control for steel, cast iron, copper and brass
  • Excellent dispersing properties
  • Contains the biocide dichlorphen
  • Built in indicator

Product Properties

Fprm: Solution
Colour: Straw coloured
Odour: None
pH: >12
Specific gravity: 1.116
Solubility in water: Completely miscible
Decomposition temp: Decomposes at boiling point

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

Application & Dosage Information

Accepta 2531 is generally dosed at 1% of the system volume to give 1000 ppm sodium nitrite.

Dose in proportion to feedwater flow.

Accepta 2531 should be injected directly to the system using an appropriate dosing pump or via a dosing pot.

Accepta 2531 contains Nitrite and has a high pH and should not be mixed with acids.

Header tanks should be covered to minimise microbiological infection.

The inhibitor levels and microbiological status should be routinely monitored

NOTE – The high pH of Accepta 2531 means that it is NOT suitable for systems containing aluminium.  For systems containing aluminium use please contact  Accepta technical specialists.

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

For further technical assistance concerning Accepta 2531 please contact Accepta.

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