Limestone — Especificaciones, proveedores y RFQ
Limestone: especificaciones técnicas, orígenes globales, certificaciones GMP+/FAMI-QS y cotizaciones verificadas. Calcium carbonate, 36–39% Ca. Primary calci…
Limestone
Also known as: Calcium carbonate · Feed grade limestone
Calcium carbonate, 36–39% Ca. Primary calcium source for layer, breeder and ruminant diets.
Applications by species
Top global export origins
FeedMatch Group's RFQ Builder benchmarks landed costs across origins for your discharge port and shipment window.
Certifications & quality standards
Buyer considerations
Advantages
- Very low cost
- Coarse and fine grades for layer shell quality
Constraints & risks
- Lead/cadmium risk from some quarries — insist on heavy-metal COAs
Buying this as part of your additive programme
Limestone is bought inside the additives category, where specification discipline — not price per kilogram — decides the real cost. Our feed additives procurement guide covers how to write a quotable specification, which certifications and registrations to demand (FAMI-QS, GMP+, EU Reg. 1831/2003), when a premix beats buying straights, and how to normalise offers to delivered cost per unit of active.
Key specifications to contract
Heavy metals — lead, cadmium, arsenic, mercury — accumulate in animal tissues and are regulated in feed materials, with mineral sources and marine ingredients carrying the highest inherent risk.
Purity covers everything that should not be in the cargo — foreign matter, other-grain admixture, hulls, soil, packaging debris and deliberate adulterants — and is verified by physical inspection plus targeted analysis.
Particle size distribution governs mixing homogeneity, pellet quality, digestive efficiency and segregation risk, and is specified as a geometric mean diameter with a distribution, not a single sieve figure.
Ash is the inorganic residue after complete combustion; it indicates total mineral content and, in protein meals, is a practical marker for bone, shell, sand or mineral adulteration.
Each parameter is explained in the specification library — what it measures, how it is tested and what to verify.
Laboratory testing programme
| Test | Why buyers run it |
|---|---|
| Assay of the declared element | Confirms the purchased mineral content, not just the salt identity |
| Heavy metals (Pb, Cd, As, Hg) by ICP-MS | Mineral sources are the primary heavy-metal entry route into feed |
| Fluorine, where phosphates are involved | Regulated and tightly limited in phosphate feed grades |
| Particle size distribution | Segregation control in premix and mash |
| Acid-insoluble ash / insolubles | Detects inert filler |
Storage, packaging, transport & handling
Generally 12–24 months when dry and sealed; caking risk rises sharply with humidity exposure.
- — Store sealed and off the floor with humidity control
- — Segregate from vitamins and organic materials to limit catalytic degradation
- — Keep clearly marked to prevent misidentification of visually similar salts
- — 25 kg bags with moisture barrier liner
- — Bulk bags for high-volume macro minerals
- — Sealed drums for hygroscopic salts
- — Protect from moisture ingress at every transfer
- — Avoid stacking pressure that compacts hygroscopic salts
- — Use dust extraction — mineral dust is abrasive and a respiratory hazard
- — Verify granulometry matches the carrier for mixing homogeneity
- — Calibrate micro-dosing equipment against actual bulk density
Procurement considerations
- —Verify heavy metals against destination limits at complete-feed level, not only per ingredient
- —Specify the mineral form and solubility, since bioavailability differs between salts
- —Require lot-specific assay rather than a typical-analysis sheet
- — GMP+ FSA / FAMI-QS feed safety scheme certification of the producing site
- — ISO/IEC 17025 accredited analysis for contractual and safety parameters
- — HACCP plan covering the specific material and process route
- — Codex Alimentarius Code of Practice on Good Animal Feeding
- — Destination-market maxima for undesirable substances in feed materials
Typical risks & common mistakes
- — Heavy-metal accumulation across multiple mineral inputs
- — Caking and dosing failure after humidity exposure
- — Substitution with a cheaper, less bioavailable salt form
- — Comparing mineral offers on product weight rather than on the element delivered
- — Testing finished feed only
Species & industry intelligence
Formulation stages, KPIs and the ingredient basket for poultry — broilers operations.
Formulation stages, KPIs and the ingredient basket for poultry — layers operations.
Formulation stages, KPIs and the ingredient basket for dairy cattle operations.
Formulation stages, KPIs and the ingredient basket for swine operations.
Related knowledge
Certificates of analysis, sampling, inspection, origin, traceability and import documentation.
Step-by-step buying guides and printable verification checklists.
Least-cost, inclusion and landed-cost tools for procurement planning.
Technical articles, market context and regulatory background.
Educational reference maintained by FeedMatch Group. We do not rank, recommend or endorse manufacturers; values are indicative industry references and never replace testing of the delivered lot.
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Frequently asked questions
What particle size should I use for layer diets?
Blend of coarse (2–5 mm) and fine (<1 mm) at ~50/50 for optimal shell strength.
How pure should feed-grade limestone be?
≥36% Ca, <10 ppm Pb, <2 ppm Cd, <500 ppm MgO. Reject Dolomitic sources for poultry.
Where do I source competitively?
Turkey, Egypt and Vietnam are top exporters. RFQ Builder benchmarks CIF.
For commercial farm feed buyers
Buying limestone for a commercial farm
- Best for
- Commercial farms, integrators, distributors and feed buyers sourcing limestone and related feed, additives or nutrition supply on a recurring commercial scale — not pet food, hobby farms or backyard quantities.
- Animal species covered
- Broilers and layers, dairy and beef cattle, pigs, tilapia, salmon and shrimp, plus sheep and goats on request.
- Typical feed buyer needs
- A written specification, verified suppliers who can hold that specification, comparable pricing on the same delivery terms, documented quality (CoA, certifications) and a supply schedule that matches production.
- Bulk feed and recurring supply
- Most requests are bulk or big-bag volumes on monthly or quarterly contracts. Volume per delivery, storage capacity on farm and contract length change price more than the headline per-tonne quote.
- Feed additives and premix
- Premix, amino acids, minerals, vitamins, enzymes, organic acids, toxin binders and other additives can be quoted alongside compound feed or ingredients so one supplier comparison covers the whole ration.
- What affects feed cost
- Raw-material origin and specification, inclusion rates, freight and Incoterms, packaging, order volume, payment terms, currency and certification requirements. Landed cost, not ex-works price, decides the winner.
- RFQ checklist
- Species and production stage, tonnes per month, target specification, delivery port or farm location, packaging, required certifications, first delivery date and contract duration.
- Supplier matching process
- You define the requirement, FeedMatch structures the RFQ, sends it to relevant qualified suppliers, and returns comparable offers side by side so you can negotiate on equal terms.
- Buyer is not charged
- Farm buyers are not charged to submit a requirement, receive matched suppliers or compare quotes.
FeedMatch helps farm buyers compare feed suppliers, nutrition providers, additives suppliers and related solutions. FeedMatch is an intermediary and does not manufacture feed or provide financing directly.