Potassium Humate Flakes
All the Solubility of the Powder, Without the Dust
K₂O 10–12%
Solubility 100%
Code JFHA-KHA-F
2–4 mm black flake · 60% humic acid · 10–12% K₂O · 100% water soluble · low dust
Product Overview
Potassium Humate Flakes carry the same chemistry as our powder grade — 60% minimum humic acid, 10–12% K₂O, fully water soluble — but in a 2–4 mm flake instead of a 60–80 mesh powder.
The reason to choose flake over powder is handling. A fine humate powder generates dust: it hangs in the air, coats the line and the operator, and a meaningful fraction of it never reaches the tank. A 2–4 mm flake pours cleanly, produces effectively no dust, and is measurably easier to dose by hand or by machine. For a plant working through bags all day, that difference is not cosmetic — it shows up in housekeeping, in operator complaints, and in material that actually gets into the batch.
The trade-off is dissolution speed. Flake takes longer to go into solution than powder. In a plant with a proper agitator and a normal batch cycle that is irrelevant; if you need something in solution in two minutes with a paddle, buy the powder.
Potassium Humate Flakes is the grade most of our export customers settle on: same analysis as the powder, considerably nicer to live with.
Key Benefits
Effectively dust-free handling
At 2–4 mm the flake pours without generating a dust cloud. Cleaner plant, no operator exposure complaints, and no product lost into the air.
Same analysis as the powder grade
60% minimum humic acid and 10–12% K₂O, fully soluble. You are choosing a physical form, not giving up specification.
Easier and more accurate dosing
Flake pours and measures cleanly, which makes hand-dosing and volumetric feeding more consistent than a fine powder that bridges and clumps.
Fully soluble, no residue
Dissolves completely under agitation. Nothing settles in the tank and nothing reaches the filter.
Better storage behaviour
Lower surface area than a powder means slower moisture uptake. The flake is less prone to caking in a humid warehouse.
Suits both fertigation and liquid production
Dissolve on site for fertigation, or feed it into a liquid fertilizer line. One grade covering both routes.
Technical Specification
| Parameter | Specification | Test standard |
|---|---|---|
| Humic acid (dry basis) | 60.0% min | HG/T 3278-2011 |
| Potassium as K₂O (dry basis) | 10.0 – 12.0% | GB/T 33804-2017 |
| Water solubility (dry basis) | 100% min | HG/T 3278-2018 |
| Moisture | 15.0% max | HG/T 3278-2011 |
| pH (1:100) | 9.0 – 10.0 | GB/T 33804-2017 |
| Flake size | 2 – 4 mm | Visual observation |
| Appearance | Black flake | Visual |
| Product code | JFHA-KHA-F | — |
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: black flakes, 2–4 mm, with a slight sheen. Hard, brittle, essentially dust-free. Breaks down under agitation in water rather than dissolving instantly.
In water: fully soluble, but slower than the powder — typically several minutes under good agitation, longer in cold water. Add under agitation, and if your cycle is short, either pre-dissolve in a side tank or use warm water.
Handling: the reason to buy this grade. No dust, clean pouring, accurate dosing. A noticeable improvement over powder for anyone working through bags by hand or on a line without dust extraction.
pH: alkaline at 9.0–10.0. Check compatibility before blending into acidic formulations or liquid phosphate.
Which potassium humate grade fits your process?
| Grade | Form | Humic acid | K₂O | Solubility | Best for |
|---|---|---|---|---|---|
| Potassium Humate Powder | 60–80 mesh powder | 60% min | 10% min | 100% | Fertigation, foliar, liquid fertilizer production |
| Potassium Humate Flakes (this product) | 2–4 mm flake | 60% min | 10–12% | 100% | Broadcast, fertigation, liquid production |
| Sodium-Free Potassium Humate | Flake or powder | 65% min | 15% min | 100% | Hydroponics, closed loops, saline–sodic soil |
| Potassium Humate Shiny Crystal | 1–2 / 2–4 mm crystal | 65% min | 10% min | 97% min | Premium soluble grades, retail packing |
| Big Shiny Flakes | 2–4 mm shiny flake | 50% min | 10–12% | 100% | Retail bagged product, visual premium grades |
| Compacted Granules | 2–4 mm oval granule | 40% min | 2–5% | 80% min | Base fertilizer, blending, broadcasting |
| Round Granule | 2–4 mm round granule | 40% min | 2–5% | 80% min | Base fertilizer, mechanised sowing |
Soluble grades (powder, flakes, crystal) dissolve for fertigation, foliar and liquid production. Granular grades (compacted, round) are built for soil placement, blending and mechanised sowing. Every grade ships with a batch COA and the same heavy-metal declaration (Pb, As, Hg, Cd, Cr below detection, GB 18877).
Applications & Dosage
Soluble, low-dust handling — suited to on-farm dissolution and to plant production alike:
| Application | How to use | Rate |
|---|---|---|
| Fertigation and drip | Pre-dissolve in a stock tank and inject through drip or micro-irrigation. | 2–5 kg/ha per application |
| Liquid fertilizer production | Feed into a dissolving tank as the humic component of a liquid NPK or suspension. | 5–15% of formulation |
| Foliar application | Dissolve fully and apply as a dilute spray. Filter the stock solution before filling the sprayer. | 0.5–1.5 kg/ha |
| Broadcast with incorporation | Apply dry to soil ahead of irrigation or rainfall. The flake dissolves in soil moisture. | 15–30 kg/ha |
| Root dip and transplant | Dissolve and use as a root dip for seedlings and transplants. | 0.5–1% solution |
| Soil drench | Apply as a drench to the root zone for horticultural and perennial crops. | 1–2 kg per 1000 L |
Packaging & Storage
| Pack size | Description |
|---|---|
| 1 kg / 5 kg / 10 kg | Printed aluminium foil bag — retail and sample size |
| 20 kg / 25 kg | Woven PP bag with inner PE liner — standard export packing |
| 1000–1100 kg | Jumbo bag with discharge spout, 4 lifting loops |
| Custom | Private-label printed bag, OEM specification, retail sizes on request |
Storage: Store in a cool, dry, ventilated place, sealed and off bare concrete. The flake is less hygroscopic than the powder and therefore more tolerant of a humid warehouse, but it will still pick up moisture if left open.
Under dry conditions it stores for years without losing solubility or analysis. It may soften slightly at the surface of a bag in very humid conditions, which does not affect the product. 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
Fertilizer distributor, Kenya
Buys flake rather than powder purely for handling at their depot. Their staff decant into smaller packs for resale to smallholders, and the dust from powder was making the packing room unusable. Same analysis, same price point, materially better working conditions.
Explore potassium humate applications →
Agriculture · Fertigation & Handling
greenhouse operator, Spain
Pre-dissolves flake in a stock tank overnight and injects at 3 kg/ha through drip on peppers and tomatoes. Prefers flake because the overnight soak gives complete dissolution by morning with no undissolved residue reaching the filters — the powder went into solution faster but formed lumps that their filtration caught.
Explore potassium humate applications →
Full case studies with crop data are published in our application sectors.
Frequently Asked Questions
Flake or powder — which should I buy?
Buy flake if handling matters: dust, dosing accuracy, working conditions. Buy powder if dissolution speed is the binding constraint — a short batch cycle or no pre-dissolving stage. The analysis is essentially the same, so this is a process decision rather than an agronomic one. Tell us your cycle time and how you dose and we will recommend one.
How long does it take to dissolve?
Several minutes under good agitation, longer in cold water and longer at high concentration. For a plant with a normal batch cycle this is a non-issue. If you need full dissolution in a couple of minutes, pre-dissolve in a side tank at higher concentration, or use the powder grade.
Is it the same specification as the powder?
Very close: 60% minimum humic acid in both, with flake at 10–12% K₂O against the powder’s 10% minimum. Both are 100% soluble. The difference is physical form and the handling that goes with it, not the chemistry.
Can I spread it dry on the field?
Yes, but it is not the most economical route — you are paying for solubility you only use once the flake meets soil moisture. It works well applied ahead of irrigation or rainfall. If you are applying dry and never dissolving, the insoluble humic acid granule is considerably cheaper per tonne for the same soil job.
Will the flake break down into dust in the bag?
No. The flake is hard and brittle but holds together under normal handling and transport. Some fines at the bottom of a bag after a long journey is normal and does not indicate a problem — it dissolves exactly the same way.
Also Available in This Family
Extruded Potassium Humate Granules – 2–4 mm, 60% Humic Acid, 100% Soluble
Potassium Humate Round Granule – 2–4 mm, 40% Humic Acid, 80% Soluble
Compacted Potassium Humate Granules – 2–4 mm Oval, 40% Humic Acid
Potassium Humate Big Shiny Flakes – 50% Humic Acid, 80% Organic Matter
Potassium Humate Shiny Crystal – 65% Humic Acid, 1–2 / 2–4 mm
Sodium-Free Potassium Humate – 65% Humic Acid, 15% K₂O, <1% Sodium
Potassium Humate Powder – 60% Humic Acid, 100% Water SolubleNeed a quotation or a sample?
Tell us your application, target market and packaging — we will come back with specification, price and lead time.
