Seawater Desalination RO Antiscalant
CAS Number: N/A (blend)
Purpose-formulated antiscalant for seawater RO (SWRO) desalination systems operating at TDS 35,000–45,000 mg/L. Controls CaCO₃, CaSO₄, and Mg(OH)₂ scale under extreme ionic strength and high Mg²⁺/Ca²⁺ concentrations typical of seawater concentrate streams.
Technical Specifications
| dosage | 1–4 mg/L to SWRO feed (optimize via Langelier / Stiff-Davis index calculation) |
| TDS range | Seawater 35,000–45,000 mg/L TDS |
| packaging | 25 kg drum or IBC 1000 L |
| appearance | Clear to pale yellow liquid |
| pH stability | Effective at feed pH 7.5–8.3 (typical seawater pH) |
| Mg Ca tolerance | High — stable at Mg²⁺ >1,200 mg/L, Ca²⁺ >400 mg/L in concentrate |
| compatible membranes | SWRO spiral-wound polyamide (Dow FILMTEC SW, Toray, Hydranautics SWC series) |
Applications
- SWRO seawater desalination plants (open-intake and beach well)
- Coastal industrial water supply RO systems
- Ship/offshore platform freshwater generation
- Seawater greenhouse horticulture RO
- Island and remote community desalination
- SWRO brine concentrate management
Key Features
- Formulated for extreme ionic strength: stable and effective in full-salinity seawater feeds
- Controls CaCO₃, CaSO₄, and Mg(OH)₂ — the dominant SWRO scale types
- Compatible with all major SWRO membrane brands including FILMTEC, Toray, and Hydranautics
- Low dosage (1–4 mg/L) minimizes permeate TDS contribution
- Tested at 45–50% SWRO recovery rates without scaling
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