Nickel Catalysed Sodium Bisulphite Oxygen Scavenger for Steam Boilers – 2973

This product is no longer available

It has been replaced by Accepta 2972


Accepta 2973 is a high performance; liquid boiler treatment scientifically formulated using nickel catalysed sodium bisulphite and developed as an oxygen scavenger for the treatment of steam boilers and boiler water systems.

Accepta 2973 is a non-volatile, inorganic oxygen scavenger, which can be used in systems operating at pressures up to 65 barg. It contains 23% sodium bisulphite.

Accepta 2973 begins to break down at pressures of 43 barg and is completely decomposed at pressures above 65 barg.

Accepta 2973 prevents corrosion in boiler and other water systems by reacting with any dissolved oxygen in the water.

Because of the nickel catalyst contained in this boiler treatment product the rate of reaction with oxygen is greatly increased, so that the oxygen is removed before it can begin to corrode metal surfaces.

Accepta 2973 may also be used for the removal of chlorine.

Product Benefits

  • Formulated using nickel catalysed sodium bisulphite
  • Excellent, non-volatile, inorganic boiler water oxygen scavenger
  • Rapid removal of oxygen leading to improved corrosion protection
  • Can be used in systems up to 65 barg

Product Properties

Composition: NaHSO3 + NiSO4
Nickel content: ~30ppm
Form: Liquid
Colour: Clear pale green
Odour: Pungent
Specific gravity: ~1.31
Solubility in water: Complete
pH (neat, 20oC): 3.5 – 5.0
 Freezing point: ~ 0°C

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

Application & Dosage Information

Accepta 2973 must be fed neat.

Accepta 2973 must be fed continuously to the storage section of the deaerator below the water line via a stainless steel quill.

Accepta 2973 cannot be fed prior to the attemperation water take-off point.

Accepta 2973 cannot be mixed with other chemicals either neat or in diluted form.

Accepta 2973 is compatible with most of Accepta’s other internal boiler treatment programmes.

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