Boiler Water Treatment


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WTP S10N is a convenient to use liquid oxygen scavenger recommended for the complete removal of oxygen from deaerator heaters, feedwater storage areas, feedwater lines, condensate return lines, boiler internals and closed recirculating water systems.

Product Data

Physical State Liquid – pink
Specific Gravity 1.22-1.26
pH 6-6.5


18ppm of WTP S10N is required for each ppm of dissolved oxygen, plus a slight excess to allow for residual testing purposes. The dose can be calculated by;

This formula will give 30 ppm sulphite as Na2SO3 

WTP S10N can be fed directly from the shipping container or diluted with clean condensate in a chemical mix tank. It is compatible with most boiler chemical additives, excluding filming amines. Minimum agitation is suggested to prevent premature activation of the oxygen scavenger with oxygen captured by mechanical action at the solution interface. As a result, covered mix tanks or floating plastic plugs are desirable. 


WTP S10N is controlled by maintaining a fixed sulphite excess of not less than 30 ppm in boilers or 3 ppm in feedwater lines. WTPTK108 test kit is available to determine sulphite levels in the system.



Please refer to material safety data sheet for detailed handling/storage instructions.
  • Avoid contact with eyes, skin and clothing.
  • In case of contact, immediately remove contaminated clothing and wash skin with soap and water.
  • For eyes, flush with plenty of water and seek medical attention.
  • Harmful if swallowed.
  • Do not leave exposed to atmosphere.


WTP S10N treatments are shipped in 25 litre and 200 litre non-returnable drums.  


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The above information is believed to be correct but does not purport to be all inclusive and shall be used only as a guide. The company shall not be held liable for any damage resulting from handling, contact, mis-use or mis-application of the above product. In all instances the user should satisfy themselves that this product is suitable for the anticipated application and should carry out suitable and sufficient risk/COSHH assessments and a method of use statement.

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