Insoluble Humic Acid Powder 40%
The Entry-Grade Humic Powder for Bulk Soil Building and Organic Fertilizer Lines
Organic matter 55% min
Fineness 80–100 mesh
Code JFHA-HA-P40
80–100 mesh black powder · 40% humic acid · 55% organic matter · pH 5.0–7.0 · water insoluble by design
Product Overview
Insoluble Humic Acid Powder 40% is the entry cut of our milled leonardite powder — the same seam and the same 80–100 mesh grind as every other grade, simply taken at the 40% humic-acid cut. Nothing is extracted and nothing is chemically solubilised; the material is dried, classified and bagged so the humic fraction stays in its native, water-insoluble form.
The 40% cut exists for one reason: it is the cheapest route to a real humic-acid and organic-matter contribution you can buy. When the material is going into soil, into a granulation line, or into a composting or blending process, you do not need solubility and you do not need a high analysis number — you need tonnes of organic matter at a price that lets you use it at hundreds of kilos per hectare. That is exactly what this grade delivers.
Insoluble Humic Acid Powder 40% is the workhorse base for bulk soil amendment and for organic-fertilizer producers who blend humic content into a finished product rather than sell it on a humic-acid claim.
Key Benefits
Lowest cost per tonne of humic + organic matter
Because the humic-acid cut is the lowest in the range, this grade carries the least processing premium. For a bulk soil programme where the goal is organic matter and structure rather than a printed humic percentage, it is the most economical buy.
A genuine organic-matter contributor
At 55% minimum organic matter this is a real input to soil organic carbon, not a trace additive. Useful where the market measures organic matter directly and a humic-acid claim is not required.
80–100 mesh grinds clean for blending and granulation
The particle size disperses through a dry blend without balling, and wets evenly in a disc or drum granulator — which is where most of this grade ends up.
Four grades, one supplier and one specification sheet
40%, 50%, 60% and 70% come off the same seam and mill. You can hold a single relationship while covering an entry-level soil conditioner and a premium registered organic product.
Stays in the root zone across seasons
Being water-insoluble, it does not flush through the profile with the first irrigation. It works gradually, which is what a soil-conditioning programme needs.
Heavy metals below detection, every batch
Pb, As, Hg, Cd and Cr are tested against GB 18877 and reported as not detected, with a batch-specific COA — no pooled or generic certificates.
Technical Specification
| Parameter | Specification | Test standard |
|---|---|---|
| Humic acid (dry basis) | 40.0% min | GB/T 11957-2001 |
| Organic matter (dry basis) | 55.0% 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-P40 | — |
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 — it will not run like a fertiliser salt.
In water: it does not dissolve, and it is not meant to. Stir a spoonful into a glass and you get a brown-black suspension that settles within minutes. Do not put this product into a fertigation system, a drip line, or a liquid fertiliser tank — it will block emitters and filters. If you need a liquid, use potassium humate or potassium fulvate.
In the granulator: the 80–100 mesh grind accepts a binder, wets evenly under spray, and builds round granules without excessive fines.
In a dry blend: it disperses well but is fine and dark — expect dust control on the line, and expect the blend to darken.
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
A soil and process material, not a tank material. Every use below is dry application or further processing:
| Application | How to use | Rate |
|---|---|---|
| Granular organic fertilizer base | Use as the humic-bearing component in a bagged organic or organic-mineral fertilizer. The 40% cut keeps raw-material cost low for a bulk product. | 20–50% of formulation |
| Bulk soil improvement | Spread and incorporate on depleted, sandy or compacted ground before planting. Incorporation matters — the material must reach the root zone. | 300–1000 kg/ha |
| Compound organic fertilizer | Add to an organic or organic-mineral line to lift organic matter to registered levels without paying for a high humic cut. | 10–30% of formulation |
| Composting and manure treatment | Add to the windrow to reduce nitrogen volatilisation and bind ammonia during composting. | 2–5% by weight |
| Saline–sodic and reclamation ground | Apply ahead of leaching. The humic fraction improves structure so salts can move through the profile. | 750–1500 kg/ha |
| Broadcast before planting | Incorporate ahead of the crop. Cheapest route to a humic + organic-matter base dressing. | 300–750 kg/ha |
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 in a dry, ventilated place. The powder carries up to 25% moisture and will absorb more on a damp floor — keep it on pallets, not on concrete. Bags are lined, but lined is not waterproof.
Under those conditions the material is stable for years; it does not degrade or lose humic acid content. It may compact slightly over time, 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
Organic fertilizer plant, Henan
Blends 40% powder at 35% of formulation into a registered organic fertilizer. Chose the 40% cut over 60% purely on cost per tonne of finished product — the registration is on organic matter, not humic acid, so the higher cut would have been money spent on a number the label never claims.
Explore humic acid applications →
Agriculture · Soil Amendment
Soil conditioner blender, Ukraine
Uses 40% powder with composted manure for a retail soil conditioner. Buys the entry cut because the product is sold on organic matter and workability, where a high humic percentage would not change the price the end user pays.
Explore humic acid applications →
Full case studies with crop data are published in our application sectors.
Frequently Asked Questions
Is 40% a ‘lower quality’ product?
No — it is the right cut for a specific job. Solubility is what costs money (KOH reaction); this grade has none of that cost because it goes into soil or a granulator, not a tank. If your specification is organic matter rather than a humic-acid percentage, 40% is the economical choice, not a compromise.
Can I use this through drip irrigation or in a liquid fertilizer?
No. It will not dissolve and will block emitters and filters. For anything that has to pass through a line, use potassium fulvate or potassium humate. We would rather tell you now than ship the wrong material.
How is this different from the 60% and 70% powder?
Same seam, same grind, different humic-acid cut — 40% here, 60% on the standard grade, 70% on the premium low-ash grade. You pay more per tonne as the cut rises, but you only need the higher cut if your label, registration or process demands a specific humic percentage. Send us your target analysis and we will pick the cheapest grade that meets it.
Which grade should I buy?
Buy the lowest grade that still hits the number you are held to. If you sell on organic matter with no humic claim, 40% is the cheapest route. If your label states a humic-acid percentage, work backwards from that claim and the inclusion you can afford.
Also Available in This Family
Insoluble Humic Acid Powder 70% – Low-Ash Grade for Oilfield & Industrial HumatesInsoluble Humic Acid Powder 50% – Humate-Salt Feedstock & General Agriculture
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.
