Insoluble Humic Acid Powder 50%
The Mid Cut for Agriculture and for Making Humate Salts
Organic matter 65% min
Fineness 80–100 mesh
Code JFHA-HA-P50
80–100 mesh black powder · 50% humic acid · 65% organic matter · pH 5.0–7.0 · humate-salt feedstock
Product Overview
Insoluble Humic Acid Powder 50% is the mid cut of our milled leonardite powder — the same seam and 80–100 mesh grind as the rest of the range, taken at the 50% humic-acid cut. It is dried, classified and bagged with no extraction and no chemical solubilisation, so the humic fraction stays in its native, water-insoluble form.
The 50% cut sits in the useful middle. For agriculture, it is enough humic acid to support a registered humic claim while staying economical for bulk blending and granulation. For industry, it is the natural feedstock for making humate salts: react it with caustic (NaOH, KOH) to produce sodium or potassium humate, or sulfomethylate it to make sulfonated humate for drilling-fluid and water-treatment use. You buy the raw humic acid here and do the reaction at your own plant, or have us toll it.
Insoluble Humic Acid Powder 50% is the grade most often specified both by fertilizer blenders and by humate-salt manufacturers who want to control their own chemistry.
Key Benefits
Enough humic acid for a registered claim
At 50% minimum, this cut supports a printed humic-acid claim on a fertilizer or soil-conditioner label — which the 40% cut cannot do — while staying well below the premium of the 60% and 70% grades.
The natural feedstock for humate salts
Reacted with NaOH or KOH it becomes sodium or potassium humate; sulfomethylated it becomes sulfonated humate for drilling and water treatment. Buying the raw 50% cut lets you run the reaction in-house or toll it, rather than paying for a finished salt.
65% organic matter alongside the humic fraction
Beyond the 50% humic acid, the material carries 65% minimum organic matter — a real soil-carbon contribution, not a trace additive.
80–100 mesh — blends and granulates cleanly
The grind disperses through dry blends without balling and wets evenly in a granulator, so it fits both fertilizer lines and humate-salt reactors.
One seam, four cuts, one supplier
40%, 50%, 60% and 70% come off the same mill. Hold one relationship while covering soil amendment, general agriculture and humate-salt production.
Heavy metals below detection, every batch
Pb, As, Hg, Cd and Cr tested against GB 18877 and reported as not detected, with a batch-specific COA.
Technical Specification
| Parameter | Specification | Test standard |
|---|---|---|
| Humic acid (dry basis) | 50.0% min | GB/T 11957-2001 |
| Organic matter (dry basis) | 65.0% min | NY 525-2012 |
| Moisture | 25.0% max | GB/T 11957-2001 |
| pH (1:100) | 5.0 – 7.0 | GB/T 33804-2017 |
| Fineness | 80 – 100 mesh | Sieve method |
| Water solubility | Nil (insoluble by design) | — |
| Appearance | Black powder | Visual |
| Product code | JFHA-HA-P50 | — |
Specification values are guaranteed minimums on a dry basis, taken from the batch Certificate of Analysis and tested against the stated Chinese industry standards. Every shipment travels with its own COA stating the tested values.
Need the full Certificate of Analysis, MSDS, or TDS for your formulation or tender file?
Form & Solubility
Form: dry black powder, 80–100 mesh, slightly damp to the touch (up to 25% natural moisture). Free-flowing but not fluid.
In water: insoluble. It will not dissolve and must not go into fertigation, drip lines or liquid tanks — it blocks emitters and filters. For a soluble product use potassium humate or potassium fulvate.
As a humate-salt feedstock: the 80–100 mesh grind reacts evenly with caustic and wets uniformly in a sulfomethylation reactor, which is why processors prefer a consistent fine powder over coarser material.
In a dry blend or granulator: it disperses well and accepts binder evenly. Expect dust control on the line.
Which insoluble grade fits your process?
| Grade | Form | Humic acid | Organic matter | Size | Best for |
|---|---|---|---|---|---|
| Humic Acid Powder | 80–100 mesh powder | 40–70% | 70–82% | 80–100 mesh | Granulation feed, soil conditioner base, blending |
| Humic Acid Crystal | 2–4 mm crystal | 60% min | — | 2–4 / 1–6 mm | Direct soil application, premium organic blends |
| Humic Acid Granule | 2–4 mm round granule | 40% min | 60% min | 2–4 mm | Bulk blending, broadcasting, organic fertilizer |
| Humic Acid Prills | 2–4 mm high-hardness | 40% min | 60% min | 2–4 mm | Urea/blending, mechanical spreading, export |
| Microbial Humic Granule | 2–4 mm inoculated | 40% min | 60% min | 2–4 mm | Bio-organic fertilizer, root-zone inoculation |
All five grades come from the same leonardite seam and carry the same heavy-metal declaration (Pb, As, Hg, Cd, Cr all below detection, GB 18877). They differ in particle form and where they fit in your process — not in origin.
Applications & Dosage
Split between agriculture and humate-salt production — both dry or react-in-plant:
| Application | How to use | Rate |
|---|---|---|
| General agriculture & soil conditioning | Blend or broadcast where a 50% humic claim is wanted. Incorporate to reach the root zone. | 300–750 kg/ha |
| Granular / organic fertilizer | Use as the humic component in a bagged fertilizer; the 50% cut supports a humic claim at moderate cost. | 15–40% of formulation |
| Sodium / potassium humate feedstock | React with NaOH or KOH to make water-soluble humate salts for agriculture and industry. | per process |
| Sulfonated humate production | Sulfomethylate to make sulfonated humate for drilling-fluid and water-treatment use. | per process |
| Compound organic fertilizer | Lift organic matter and humic acid to registered levels in an organic-mineral line. | 10–30% of formulation |
| Composting and manure treatment | Reduce nitrogen volatilisation and bind ammonia in the windrow. | 2–5% by weight |
Packaging & Storage
| Pack size | Description |
|---|---|
| 20 kg / 25 kg | Woven PP bag with inner PE liner — standard export packing |
| 50 kg | Woven PP bag with inner liner — for high-volume programmes |
| 1000–1100 kg | Jumbo bag with discharge spout, 4 lifting loops |
| Custom | Private-label printed bag, OEM specification, retail sizes on request |
Storage: Store under cover, on pallets, in a dry ventilated place. Up to 25% moisture — keep off bare concrete. Stable for years; may compact slightly, which breaks up easily. Shelf life: 24 months in original, unopened packaging.
Custom packaging, private-label printing and OEM specifications are available on request. Packaging photos are available in the product gallery.
Successful Cases
Humate-salt manufacturer, China
Buys 50% powder and reacts it with NaOH in-house to make sodium humate flakes for agriculture and aquaculture. Chose the 50% cut over the 70% grade because the reaction dilutes the analysis anyway, and the 50% cut was the cheapest raw humic acid that still met their incoming-specification floor.
Explore humic acid applications →
Agriculture · Humate Feedstock
Fertilizer blender, Turkey
Blends 50% powder at 20% into a registered humic fertilizer. Needed a printed humic-acid claim (which the 40% cut could not support) but did not want to pay the 60/70% premium for a bulk blended product.
Explore humic acid applications →
Full case studies with crop data are published in our application sectors.
Frequently Asked Questions
Can I make sodium or potassium humate from this?
Yes — that is a primary use of the 50% cut. React it with caustic (NaOH for sodium humate, KOH for potassium humate) to get a water-soluble salt, or sulfomethylate it for drilling-fluid and water-treatment grades. We can toll the reaction or supply the finished salt separately.
Is 50% enough for a humic-acid claim on my label?
At 50% minimum it supports a humic-acid claim that the 40% cut cannot. If your claim is higher (60% or 70%), buy the corresponding grade. We will tell you the cheapest cut that meets your stated number.
Can I use it in fertigation or a liquid tank?
No. It is water-insoluble and will block lines and emitters. For soluble use, convert it to a humate salt or use our potassium humate / fulvate ranges.
How does it differ from the 40% and 70% cuts?
Same seam and grind, different humic-acid cut — 40% / 50% / 60% / 70%. The 50% cut is the middle: enough for a humic claim and for humate-salt feedstock, without the premium of the high cuts. Buy the lowest cut that meets your specification.
Also Available in This Family
Insoluble Humic Acid Powder 70% – Low-Ash Grade for Oilfield & Industrial HumatesInsoluble Humic Acid Powder 40% – Bulk Soil Amendment & Organic Fertilizer Base
Microbial Humic Granular Fertilizer – Humic Granule + Bacillus Inoculant
Insoluble Humic Acid Prills – 2–4 mm High-Hardness, 5% Max Moisture
Insoluble Humic Acid Granule – 2–4 mm Disc-Granulated, 40% Humic Acid
Insoluble Humic Acid Crystal – 60% Humic Acid, 2–4 mm Irregular GranuleInsoluble Humic Acid Powder 60% – Standard Grade from LeonarditeNeed a quotation or a sample?
Tell us your application, target market and packaging — we will come back with specification, price and lead time.
