Executive Summary
The right grade is the one that matches your line — not the highest number on the label.
- First gate: feed grade with As/Pb/Cd within limits. Industrial grade never enters feed.
- Purity band: 55%, 60%, or 62% MnO — compare on cost per kg of elemental Mn.
- Particle size: 80–200 mesh for premix plants; looser for compound feed and mineral mixes.
- Availability: citric acid solubility ≥ 85–90% before you compare prices.
60% feed-grade MnO covers most premix, compound feed, and mineral mix programs. See Feed Grade Manganese Oxide (MnO) 60% for the standard grade.
Quick Answer: The Right Grade Is the One That Matches Your Line, Not the Highest Number
Five steps decide the grade:
| Step | Filter |
|---|---|
| 1. Safety | Feed grade — As/Pb/Cd within limits, traceable, regulatory-compliant |
| 2. Purity band | 55% / 60% / 62% MnO — compare on cost per kg Mn, not label % |
| 3. Particle size | 80–200 mesh for premixes; looser for compound feed, mineral mixes |
| 4. Availability | Citric acid solubility ≥ 85–90%, dual MnO/Mn assay |
| 5. Cost | Price per kg elemental Mn across all surviving quotes |
For most premix and complete-feed lines, 60% feed-grade manganous oxide is the answer: it is the market mainstream, the best-supplied band, and the reference grade most TDS documentation is written around.
Step 1 — Start with the Non-Negotiable: Feed Grade or Nothing
| Item | Feed-grade requirement | Why |
|---|---|---|
| Arsenic | ≤ 5 ppm | Regulatory limit, target markets |
| Lead | ≤ 10 ppm | Regulatory limit |
| Cadmium | ≤ 5 ppm | Regulatory limit |
| Traceability | Batch COA, production records | Audit and recall readiness |
| Compliance | EU feed regs, AAFCO, GB 13078 | Market entry |
Industrial-grade MnO is sold for metallurgy, ceramics, and welding. Its heavy-metal limits are set for those uses, not feed. A few dollars saved per tonne of MnO puts the entire feed output at audit and recall risk. Feed grade is the entry ticket, not a premium option. See our guide on what 60% manganous oxide means in feed-grade MnO products.
Step 2 — Pick the Purity Band: 55%, 60%, or 62% MnO
| Band | Position | Where it fits |
|---|---|---|
| 55% MnO (~42.6% Mn) | Entry band | Cost-driven compound feed, mineral mixes with room for volume |
| 60% MnO (~46.5% Mn) | Mainstream | Premixes, standard compound feed, most world trade |
| 62% MnO (~48.0% Mn) | High band | High-concentration premixes where carrier space is limited |
Two points buyers miss:
- The label percentage is not the price basis — cost per kg of elemental Mn is.
- Supply matters. 60% is the deepest band in world trade: the most producers, consistent specs, competitive quotes. 62% is offered by fewer producers, so verify batch history before committing a formula to it.
Choose 62% when premix carrier space limits inclusion. Otherwise 60% is the workhorse.
Step 3 — Match Particle Size to Your Production Line
| Line | Recommended particle size | Reason |
|---|---|---|
| Vitamin-mineral premix | 80–200 mesh | Mixing uniformity at gram-level inclusions; low CV |
| Compound feed (mash/pellet) | 80–200 mesh or coarser | Standard mixing handles it; pelleting unaffected |
| Mineral mixes, blocks | Coarser acceptable | Large batch dilution; no micro-dosing |
| High-precision micro-dosing | Fine, but check flow | Dust and weighing precision issues |
Particle size errors show up on the floor: too coarse in a premix means segregation and uneven CV; too fine for the dosing system means dust, bridging, and weighing errors at gram levels. Match the spec to the line, and confirm it on the COA of every shipment.
Step 4 — Check the Availability Indicators Before You Compare Prices
| Indicator | Threshold | What it screens out |
|---|---|---|
| 2% citric acid solubility | ≥ 85–90% | Poorly reduced oxide with higher-oxide residues |
| Dual assay (MnO% and Mn%) | Mn ≈ MnO × 0.774 | Inconsistent or inflated assays |
| Batch COA history | Stable across 3+ batches | Spot quality from toll roasters |
This layer filters the quotes that pass purity but fail performance — two batches of “MnO 60%” can differ twofold in usable Mn depending on reduction quality. Full mechanism: see What Factors Affect the Bioavailability of Manganese Oxide in Animal Nutrition? A supplier who cannot show solubility data is asking you to run the feeding trial on your animals, at your cost.
Step 5 — Run the Real Cost Comparison: Price per kg of Elemental Mn
Formula:
Price per kg Mn = price per tonne ÷ (Mn% × 1,000)
Worked example across purity bands (illustrative prices):
| Quote | Price/tonne | Elemental Mn | Price per kg Mn |
|---|---|---|---|
| Supplier A, 55% MnO | $780 | 42.6% |
1.83 |
| Supplier B, 60% MnO | $850 | 46.5% |
1.83 |
| Supplier C, 62% MnO | $900 | 48.0% |
1.88 |
Supplier A and B are identical per kg Mn — the tonne price difference is pure Mn density. Supplier C’s premium only pays when carrier space or dosing weight matters. Run the same math on every RFQ, after steps 1–4 have filtered the field. A quote that fails safety or solubility is not a cheaper option at any price.
Physical and Handling Specs That Decide Day-to-Day Performance
| Spec | Typical requirement | Consequence of ignoring it |
|---|---|---|
| Moisture | ≤ 1.5% | Caking in bags and silos; blocked dosing lines |
| Bulk density | Consistent with your silo design | Volume-based dosing errors |
| Flowability | Free-flowing, non-hygroscopic | Bridging, interrupted production |
These are the specs nobody discusses at the RFQ stage and everybody argues about after arrival. Manganous oxide is naturally non-hygroscopic — hold moisture at ≤ 1.5% and the rest follows. Confirm bulk density if your dosing system is volumetric.
Matching the Grade to the End Application: Premix, Compound Feed, or Mineral Mixes
| Application | Recommended grade | Notes |
|---|---|---|
| Poultry premix | MnO 60%, 80–200 mesh | Gram-level dosing needs uniformity; low heavy metals |
| Swine compound feed | MnO 60%, standard mesh | Lowest inclusion of all species; precision matters most |
| Ruminant mineral mixes / blocks | MnO 60%, moisture ≤ 1.5% | Non-caking behavior in salt-based mixes is the point |
| Aquaculture | MnO 60% fine or MnSO₄ | Leaching losses; solubility-dependent |
Species-specific levels and dosage math: see our guides on MnO in poultry feed, swine nutrition, and cattle and ruminant feed.
Supplier Factors That Belong in the Grade Decision
| Factor | What good looks like |
|---|---|
| Batch consistency | COAs within a narrow band across shipments |
| Documentation | TDS with dual assay and solubility; batch COA on request |
| Custom milling | Mesh and heavy-metal specs adjusted to your line |
| Supply stability | Production capacity, not just spot inventory |
The same “60% MnO” grade from two suppliers is two different products. Grade selection and supplier selection are one decision — the spec only exists if the producer can hold it shipment after shipment.
A Practical Selection Checklist You Can Use on Your Next RFQ
| # | Check | Pass condition |
|---|---|---|
| 1 | Feed grade declared | As ≤ 5, Pb ≤ 10, Cd ≤ 5 ppm |
| 2 | Purity band | 55/60/62% fits your application |
| 3 | Particle size | Matches your line (80–200 mesh for premix) |
| 4 | Citric solubility | ≥ 85–90% in 2% citric acid |
| 5 | Dual assay | Mn ≈ MnO% × 0.774 |
| 6 | Moisture | ≤ 1.5% |
| 7 | Cost per kg Mn | Calculated, not quoted |
| 8 | Batch history | 3+ consistent COAs |
| 9 | Documentation | TDS, COA, third-party option |
| 10 | Regulatory fit | EU / AAFCO / GB 13078 per your market |
Frequently Asked Questions About Choosing Manganese Oxide Grades
Is 62% MnO always better than 60%?
No. Better Mn density, but only worth a premium when carrier space or dosing weight is constrained. On straight cost per kg Mn, 60% usually wins in competitive markets.
Can I use one grade for all species?
Yes — MnO 60% serves poultry, swine, and ruminant lines. What changes by species is the inclusion level and the dosing precision, not the grade.
What’s the minimum spec I should accept?
Feed-grade heavy-metal limits, 80–200 mesh if you premix, citric solubility ≥ 85%, moisture ≤ 1.5%, and a dual assay. Below that, you are buying someone else’s quality problem.
How do I compare suppliers quoting different grades?
Convert every quote to price per kg of elemental Mn: price per tonne ÷ (Mn% × 1,000). Then compare solubility data and batch consistency among the survivors.
Conclusion: Define Your Line First, Then Let the Spec Follow
Grade selection runs in fixed order: feed grade first, purity band justified by cost per kg Mn, particle size for your line, solubility to confirm availability, then the real price comparison. Sixty percent feed-grade MnO is the answer for most lines; exceptions are driven by carrier space and dosing weight, not label chasing.
Tell us your feed line and target Mn level. We’ll confirm the right grade, attach the TDS with solubility data and the batch COA, and send a sample — before you commit the RFQ to anyone.
I am Edward lee, founder of manganesesupply( btlnewmaterial) , with more than 15 years experience in manganese products R&D and international sales, I helped more than 50+ corporates and am devoted to providing solutions to clients business.
