MCP vs DCP — Choosing the Right Feed Phosphate
MCP and DCP are the two standard inorganic phosphate sources in compound feed. MCP carries 22% P at high water solubility and low calcium; DCP carries 18% P with more calcium and a lower price per tonne. The decision is never price per tonne — it is delivered cost per unit of available phosphorus at the Ca:P ratio your formula can absorb.
MCP 22% P (monocalcium phosphate)
- Higher phosphorus density (21–22.7% P) — fewer tonnes per unit of P
- ≥90–95% relative bioavailability; high water-soluble P share
- Low calcium (15–17% Ca) leaves formulation room for limestone
- Essential where Ca:P must stay narrow — shrimp, fish, piglet, broiler starter
- Granular grades flow and store well in humid discharge ports
- Premium of roughly USD 40–90/MT over DCP in a normal market
- Hygroscopic — powder grades cake if the liner or storage is poor
- Less calcium means limestone must be re-balanced in the matrix
- — Shrimp and fish feed requiring a narrow Ca:P ratio
- — Broiler starter, breeder and piglet diets where available P limits performance
- — Mills importing over long freight legs, where P density cuts freight per unit of P
DCP 18% P (dicalcium phosphate)
- Lowest cost per tonne of the standard phosphates
- Adequate availability (~80–85%) for most grower and layer diets
- Calcium contribution (23–25% Ca) replaces part of the limestone
- Widest origin choice — China, Morocco, Tunisia, Vietnam, Israel, Jordan
- Lower available P — more tonnes, more freight per unit of P
- Citric-acid solubility varies widely between plants; weak lots underperform
- High calcium can breach the Ca:P ceiling in shrimp and starter diets
- Fluorine and cadmium slippage is more common in cheap powder lots
- — Standard broiler grower/finisher, layer, swine and ruminant diets
- — Cost-optimised commodity feed with room in the calcium budget
- — Buyers with a reliable plant whose citric-acid solubility is proven by history
| Criterion | MCP 22% P (monocalcium phosphate) | DCP 18% P (dicalcium phosphate) |
|---|---|---|
| Indicative CFR cost per tonne (2025 range) | USD 560–700 (22% P granular) | USD 480–620 (18% P granular) |
| Cost per unit of available P (the number that decides) | CIF ÷ (0.22 × ~0.95 availability) — usually competitive despite the tonne premium | CIF ÷ (0.18 × ~0.83 availability) — cheaper only when the spread stays under ~USD 60/MT |
| Typical composition (contract these, do not assume) | P 21.0–22.7%, Ca 15–17%, water-soluble P ≥ 80% of total P | P 18.0–18.5%, Ca 23–25%, citric-acid solubility ≥ 90% |
| Quality risk to monitor on every lot | Fluorine ≤ 1,800 mg/kg, P:F ≥ 100:1, moisture, caking, Cd/Pb/As | Citric-acid solubility, fluorine, cadmium, assay slippage below spec |
Normalise every offer to delivered cost per unit of available phosphorus, then check the Ca:P ratio the grade forces on your matrix. DCP 18% wins most grower, layer and ruminant volume while the MCP premium stays above roughly USD 60/MT. MCP 22% wins in shrimp, fish, starter and breeder diets, and often wins outright on long freight legs because you ship fewer tonnes per unit of P. MDCP sits between the two and is a legitimate compromise. Run the same phytase trade-off on both: a standard phytase dose releases 0.10–0.15% available P and removes 30–50% of the inorganic phosphate inclusion.
Frequently asked questions
Is MCP always better than DCP?
How do I compare an MCP and a DCP offer correctly?
What about MDCP?
Which fluorine and heavy-metal limits should I contract?
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