The problem you’re solving
Growers correcting soil pH and calcium deficiency with mined calcitic lime deal with slow reactivity, dusty handling and variable purity. AG-CAL is a naturally rounded, high-purity oolitic aragonite supplied at agricultural sizing for spreader-friendly application.
Why this material fits
- Soil pH correction and calcium nutrition in row crops
- Blending into dry fertiliser programmes
- OMRI Listed® input, product listing avw-23215
- Rounded oolitic particles flow and spread without the dust of crushed limestone
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
- 0.2–0.5 mm agricultural
- Coarse
- Custom distribution to your specification
Packaging options
- Bulk / ton
- Super-sack
Technical documents
- Technical data sheet (Rev 2026.1)
- Safety data sheet (SDS) — sent by our team
- Certificate of analysis, current lot
OMRI Listed® under product listing avw-23215. OMRI listing is a review of the input itself, not organic certification of your operation; permitted uses are subject to the current OMRI certificate.
Frequently asked questions
Is AG-CAL approved for organic production?
OMRI Listed® under product listing avw-23215. OMRI listing is a review of the input itself, not organic certification of your operation; permitted uses are subject to the current OMRI certificate.
How does aragonite differ from calcitic limestone?
Aragonite is the orthorhombic polymorph of calcium carbonate, with a different crystal system, density and particle morphology from calcite. The comparative technical brief covers crystal system, density, solubility, morphology and purity side by side.
Where AG-CAL is used
Ready to evaluate AG-CAL?
Send your specification, tonnage and delivery point and our team comes back with numbers, usually within one business day.