Keep hardness soluble. Keep RO membranes productive.
ROSOFT® is a concentrated, instant-powder antiscalant developed to control mineral precipitation in reverse-osmosis membrane systems.
ROSOFT® is designed to inhibit scale-forming reactions in supersaturated RO concentrate streams. When correctly selected and dosed, it can help control calcium carbonate, calcium sulfate, calcium phosphate, barium sulfate, strontium sulfate and certain metal-containing deposits. Unlike ion-exchange softening, ROSOFT® does not remove calcium and magnesium from the feed water. Instead, it interferes with crystal nucleation and growth while helping disperse fine particles so they are more likely to remain transportable in the concentrate stream. This can reduce dependence on salt-regenerated softening in technically suitable RO installations.
No brine regeneration / Controlled mineral precipitation
One antiscalant platform.
Multiple RO feed-water sources.
ROSOFT® may be incorporated into membrane pretreatment programmes for different feed waters after a complete water analysis, recovery assessment and membrane-system projection.
Surface-Water RO
Scale-control support for membrane systems treating properly clarified and filtered surface water.
Brackish-Water RO
Inhibits mineral precipitation as dissolved salts become concentrated across the membrane system.
Wastewater-Reuse RO
Supports reliable membrane operation where reclaimed water contains variable hardness, alkalinity and scaling ions.
Seawater RO
Application-specific control of mineral precipitation in seawater desalination pretreatment.
Multi-Pass RO Systems
Helps manage supersaturation in suitably designed two- or three-pass membrane configurations.
Industrial Process-Water RO
Scale-control support for industrial water production, reuse and high-recovery RO installations.
Four scale-management functions / In one instant powder
Delayed crystal formation (NUCLEATION-CONTROL)
Interferes with the early formation of scale crystals, helping water remain supersaturated without immediate precipitation under validated operating conditions.
Crystal-growth modification (CRYSTAL-GUARD)
Adsorbs at active growth sites and alters normal crystal development, making deposits less likely to form dense, adherent membrane scale.
Fine-particle dispersion (DISPERSION-ACTIVE)
Helps keep susceptible particles and modified crystals dispersed so they can travel with the concentrate rather than accumulate on membrane surfaces.
High-recovery RO operation (RECOVERY-SUPPORT)
Provides application-specific scale control that may support increased recovery, reduced cleaning frequency and more stable permeate production.
How ROSOFT® controls mineral scale
ROSOFT® manages precipitation kinetics rather than removing hardness ions. Its performance depends on water chemistry, antiscalant concentration, recovery, temperature, pH and membrane operating conditions.
- Threshold Inhibition – Small antiscalant concentrations delay precipitation even when scale-forming ions exceed normal solubility limits.
- Crystal-Growth Interference – Active molecules adsorb onto developing crystal surfaces and disrupt orderly growth, reducing compact scale.
- Deposit Dispersion – Modified crystals and suspended metal-containing particles are stabilized and dispersed to limit surface attachment.
- Concentrate-Stream Management – Scale-forming ions remain in water and become concentrated as permeate is produced, leaving through the RO concentrate stream.
Explore ROSOFT® Posters
Frequently
Asked Questions
Practical guidance for selecting, preparing and applying ROSOFT® in reverse-osmosis systems.
Contact SupportDesign a reliable RO scale-control programme
It starts with complete water chemistry and an accurate membrane projection.
Send us your RO feed-water analysis (hardness, alkalinity, silica, sulfate, TDS), system recovery, and operating flow rates. Our specialists will help evaluate ROSOFT® for your reverse-osmosis pretreatment system.
