The problem you’re solving
Low-alkalinity, aggressive or desalinated water needs a calcium and alkalinity source that will not introduce contaminants. WT-CAL is a coarse, high-purity aragonite media for remineralization and pH stabilization duty.
Why this material fits
- Remineralization of soft, desalinated or low-alkalinity water
- pH stabilization in process water loops
- Coarse rounded media suited to contactor beds
- Low silica, alumina and iron on the representative analysis
Verified specifications
Representative values, technical data sheet Rev 2026.1. Lot-specific values are given on the certificate of analysis for the shipment supplied.
| Property | Value | Method |
|---|---|---|
| Calcium carbonate (CaCO₃) | 97.8% representative | — |
| Magnesium carbonate (MgCO₃) | ≤ 0.9% | — |
| Silica (SiO₂) | ≤ 0.6% | — |
| Iron oxide (Fe₂O₃) | ≤ 0.04% | — |
| Alumina (Al₂O₃) | ≤ 0.10% | — |
| Alkalis (Na₂O + K₂O) | ≤ 0.30% | — |
| Loss on ignition | ~ 43% | — |
| Crystal system | Orthorhombic (aragonite) | — |
| Specific gravity | 2.93 | — |
| Whiteness | 92–94 | ISO |
| Hardness | 3.5–4.0 Mohs | — |
| Surface area | 1.0–2.5 m²/g | — |
| Particle morphology | Rounded oolitic | — |
| CAS number | 471-34-1 | — |
Available particle sizes
- 1–3 mm coarse
- Custom distribution to your specification
Packaging options
- Super-sack
- Bulk
Technical documents
- Technical data sheet (Rev 2026.1)
- Safety data sheet (SDS) — sent by our team
- Certificate of analysis, current lot
No kiln. No calcination. Less processing than conventional calcined lime.
Frequently asked questions
Is WT-CAL certified for potable water contact?
We do not publish a drinking-water contact certification for this grade. Confirm with our supply team before specifying WT-CAL in a potable duty.
What bed sizing should we use?
Bed sizing depends on flow, target alkalinity and contact time. Send your design basis with a technical evaluation request and our team will review it with you.
Where WT-CAL is used
Ready to evaluate WT-CAL?
Send your specification, tonnage and delivery point and our team comes back with numbers, usually within one business day.