Membrane Alkaline Cleaning Compound as Powder


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WTPRO418 Plus


RO418Plus is a 100% powder blend of inorganic detergent builders and chelating agents, based on phosphate and non-phosphate ingredients. Specifically developed as an alkaline cleaning formulation for removing organic matter and biofouling from all types of membranes.

RO418Plus must always be used as recommended by the membrane manufacture in respect of temperature, pH, etc.

Product Benefits

  • Powder product for ease of use and shipment.; 100% active materials
  • Effective cleaner, at low concentrations, for removing organic deposits from membranes
  • Suitable for reverse osmosis, nanofiltration and ultrafiltration membranes
  • Has a wide range of applications and compatibility with many other cleaners


Physical State Off white powder
pH of 1.0% solution approx. 11

*All figures are approximate


Treatment and Dosage Requirements

Before cleaning it is advisable to remove any alkaline scale deposition by treatment with an acidic cleaner (for example RO404).

Chlorine-free product water should be used to make up a 1 – 2 % w/w solution of RO418Plus. This is done by using a mixer or by circulating the solution through the cleaning pump. The cleaning solution should be circulated through the elements for one hour. The flow rate should be as designated by the membrane manufacturer or equipment manufacturer. Soaking the membrane for several hours should be followed by 15 - 30 minutes recirculation. The desired strength of the cleaning solution and the cleaning time depend on membrane fouling and should be established by experience.

This sequence may have to be repeated in the case of heavily fouled membranes, and it is recommended that the cleaning is carried out at the maximum temperature which the membrane manufacturer will allow.

After the cleaning process the membranes should be rinsed with clean water to remove any residual RO418Plus. When the plant is returned to duty, product water should be discarded for at least 15 minutes.


Avoid direct contact with skin and eyes to prevent mild irritation. In case of accidental contact, flush area with clean water. Product should not be ingested. Refer to Safety Data Sheet for full details.

The product does not contain caustic soda and has no ADR Classification.


The product is available in 5, 10 or 25 kg pails.


Field Representatives will work closely with customer personnel to assure the effective application of the water treatment programme. Qualified personnel can provide regular service calls.

More Information

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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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