dvr Antiscalant RXSOL ORG EV

Antiscalant RXSOL ORG EV  is a high performance liquid product for the control of alkaline scaling (calcium carbonate and magnesium hydroxide) in all types of seawater distillation plants. Antiscalant ORG EV is an aqueous solution of a synthetic polymer based on hydrolysed maleic anhydride.Used alone or in conjunction with a sponge ball cleaning system its effectiveness has been demonstrated in distillation plants operating with top brine temperatures up to 120 ºC.

Technical Specifications:

Physical Properties

Appearance : Clear amber liquid
Odour : Slight
Solids content : 47-53% w/w
Specific gravity : 1.16 to 1.19 at 20/20 oC
pH : 2 maximum
Boiling range (760 mm Hg) : 100-102°C (212-215°F)
Freezing point : 0 to -12oC
Solubility in Water : Miscible
Iron PPM : <10
Lead PPM : <10

Antiscalant RXSOL ORG EV  can be used in all types of distillation plant but is particularly suitable for use in multi-stage flash plants.


RO antiscant

Scaling is caused in membranes because the level of hardness salts in the water becomes highly concentrated as it passes through the RO unit. In smaller units scale formation can be prevented by base exchange softening the make-up water but for larger systems that is very expensive. We have developed a range of easy to handle, cost effective RO Antiscalant which increase the solubility of the hardness salts so they remain in solution rather than forming scale on the membrane. Our cost effective RO antiscalants will inhibit a wide range of foulants including: calcium carbonate, calcium sulphate, barium sulphate, strontium sulphate, calcium fluoride, silica and iron.

RO Antiscalants are dosed directly to the RO feed water tank or feed water line (after pretreatment) at the recommended dosage of 1-3 mg/L and maximum dosage at 8mg/L, subject to inlet water quality and parameters is respect of Calcium Hardness, Iron, TDS, Alkalinity, pH and silica content. Maximum dilution should be 10% with RO or DI water for temperature less than 30 deg C. For higher temperature the dilution ratio can increase. 

Key Features and Benefits

  • Inhibit scale formation and effectively controls corrosion
  • Protects the membrane efficiently
  • Enhance the plant operation and equipments life span
  • Economical
  • Easy in usage and handling


Our RO Antiscalant (HIGH PH) is a super-threshold RO membrane antiscalant and antifoulant which is able to stabilize a wide range of supersaturated salt solutions, thereby preventing the precipitation on the membrane surface. 

It reduces the risk of scaling and eliminates the use of hazardous acids,resulting in efficient plant operation with highest possible conversion rate. 

It is a very effective antiscalant . It is also compatible with RO CHEMICALS series of coagulant and flocculants (polyelectrolytes). Our RO Antiscalant (HIGH PH) is effective in minimizing scaling in presence of foulants like Calcium Carbonate, Sulfate salts of Calcium, Barium, Strontium and Magnesium, Calcium Fluoride, Iron and Silica.

Key Features and Benefits

  • Effective scale inhibition 
  • Alkalinity builder 
  • High recovery rate 
  • Low Chemical dosage 
  • Cost Effective 
  • Effective Iron fouling control by sequestration 
  • Reduced frequency of membrane cleaning 
  • Compatible with all types of membranes 
  • Completely organic and biodegradable 

Application and Dosage
Our RO Antiscalant (HIGH PH) is dosed directly to the RO feed water tank or feed water line (after pretreatment) at the minimum recommended dosage of 1ppm and maximum dosage at 15ppm, subject to inlet water quality and parameters is respect of Calcium Hardness, Iron, TDS, Alkalinity, pH and silica content. 

In case of high iron content of about 0.5 to 1.0ppm, the dosing has to be increased by 10-15ppm for stabilizing Calcium. 

At about 10-15ppm dosage our RO Antiscalant (HIGH PH) is capable of fully inhibiting iron and calcium, and silica up to 166ppm. For higher silica content RXSOL ANTISCALANT should be used. 

Antiscalant RO                                   RXSOL-33-3302-025
Antiscalant C.I ALKA                          RXSOL-33-2034-025
Membrane Antiscalant ALKA 191T    RXSOL-33-3321-030 
Antiscalant ORG EV 2030                 RXSOL-33-3325-230
Antiscalant RXSOL ORG EV             RXSOL-33-3327

Using Procedure:

Antiscalant RXSOL ORG EV is an aqueous solution of an organic acid and as such is corrosive in its concentrated form. Corrosion resistant dosing equipment must be used. Examples of suitable materials are 316L stainless steel and PVC or other plastic materials. Recommended injection points are either into the seawater make-up line after any external de-aeration and decarbonation equipment or into the recycle brine stream at a suitable point after the blowdown and typically into the discharge of the recycle brine pump

Antiscalant RXSOL ORG EV  is miscible with water in all proportions. It may be applied as the neat product, or as a solution in distillate and should be dosed continuously, and proportionately to the seawater make-up flow, to maintain the recommended dose level.

The dose level required will depend on a number of factors, including the quality of the seawater feed, TBT, recycle brine concentration factor, the type of distillation plant and frequency of application of the sponge ball cleaning system. Typical dose levels, when used in conjunction with a sponge ball cleaning system, are 0.8 to 1.2 mg/l at TBT 90 ºC and 2.0 to 3.0 mg/l at TBT 110 ºC. Detailed recommendations for any plant will be made on request



Thermal Stability: 
Thermogravimetric analysis and differential scanning calorimetry have shown that Antiscalant RXSOL ORG EV is stable up to a temperature of 300 oC.

Chemical Reactivity: 
Antiscalant RXSOL ORG EV  is not affected by chlorine or other oxidising biocides under normal conditions of use. It is readily broken down by strong oxidising

Packing : Net weight 240 kg Gross weight 248.5 kg. Antiscalant RXSOL ORG EV is also available in Bulk packing in IBC Tank as 1200 Kgs and small packing as 25 Kgs.

Handling : Avoid inhalation of vapors/spray and contact with skin and eyes. Avoid eating, drinking and smoking when using the product. Observe good chemical hygiene practices.

Storage :  Protect against physical damage and/or friction. Keep in original container. Store in tightly closed original container in a dry and cool place. Store away from: Alkalis. Reducing Agents. Do NOT use container made of: Carbon steel. Store away from strong oxidising agents.

Shelf Life : 24 Month from date of Mnaufacturing

Note: This article uses material from the