In the rapidly expanding global sustainable agriculture, organic soil remediation, high-efficiency water-soluble fertilization, aquaculture, and industrial water treatment markets, humic acid and its derivative salts have evolved from traditional raw mineral products into indispensable core functional inputs. As agricultural producers, fertilizer distributors, aquaculture operators, and cross-border chemical merchants actively seek cost-effective, high-purity, and eco-friendly organic inputs, Humic Acid, Sodium Humate, and Potassium Humate have emerged as high-volume, high-turnover, evergreen hot-selling products in the global trade sector.
Derived from rich oxidized low-grade coal reserves (weathered coal and lignite), these organic substances carry mature manufacturing standards, making them straightforward to import, distribute, and stock for agricultural importers and chemical distributors worldwide. China has established itself as the undisputed global manufacturing powerhouse and R&D center for humic acid products, supplying raw mineral powders, high-solubility Potassium Humate shiny flakes, and specialized aquaculture-grade Sodium Humate that seamlessly blend natural mineral purity with advanced industrial extraction craftsmanship.
If you are an international importer, agricultural input distributor, B2B chemical buyer, or e-commerce seller searching for certified, stable-quality, and cost-competitive humic acid supplies, this guide delivers a comprehensive roadmap—from molecular characteristics and structural product comparisons to navigating China’s major regional industrial supply chains.
Table of Contents
I. Understanding Humic Acid and Its Salt Derivatives
What is Humic Acid?
Humic Acid is a complex macromolecular organic substance resulting from the long-term microbial decomposition and geological transformation of plant and animal residues (mainly in weathered coal, lignite, and peat). Rich in active functional groups such as carboxyl (-COOH), phenolic hydroxyl (-OH), and quinone groups, it acts as a natural soil conditioner, nutrient chelator, and plant biostimulant.
Core Working Principles & Chemical Transformations
The versatile application of humic acid products is driven by their unique chemical properties and solubility behavior:
- Nutrient Complexation & Chelation: The abundant carboxyl and phenolic hydroxyl groups act as natural chelating agents, binding trace elements (Fe, Zn, Mn, Cu) and phosphorus in the soil to prevent fixation and dramatically improve nutrient uptake efficiency in plant roots.
- Alkaline Solubilization & Salt Formation: Natural humic acid is insoluble in water under acidic or neutral conditions. Through alkaline reaction with potassium hydroxide (KOH) or sodium hydroxide (NaOH), raw humic acid transforms into highly soluble Potassium Humate or Sodium Humate, unlocking immediate bioactivity for liquid fertilization, aquaculture, and industrial applications.
II. Product Types, Market Comparison, and Detailed Analysis
1. Main Product Categories
- Humic Acid (Raw Powder / Granule): Pure extracted or finely ground mineral powder derived from high-grade weathered coal. Containing high organic matter and humic acid concentration, it is water-insoluble and serves as the primary raw material for base fertilizers, bulk blend (BB) fertilizers, and long-term soil remediation.
- Potassium Humate (Potassium Salt of Humic Acid): Produced by reacting active humic acid with potassium hydroxide. Available as 100% water-soluble shiny flakes, crystal granules, or fine powder. It combines organic biostimulant action with available potassium ($K_2O$), making it a flagship product for fertigation, foliar sprays, and drip irrigation systems.
- Sodium Humate (Sodium Salt of Humic Acid): Manufactured via sodium hydroxide reaction. Highly soluble in water, appearing as black shiny flakes, powder, or extruded column granules. Widely used in aquaculture for water conditioning, animal feed additives, ceramic binders, battery plate expanders, and industrial wastewater treatment.
2. Comprehensive Product Comparison & Matrix Analysis
To help international buyers select the exact product for their targeted market, the key technical and functional differences are detailed below:
| Feature / Parameter | Humic Acid (Raw) | Potassium Humate | Sodium Humate |
|---|---|---|---|
| Water Solubility | Insoluble in water (Soluble in alkaline solutions) | 100% Highly Soluble (Anti-hard water grades available) | 100% Fully Soluble |
| Appearance & Form | Black/Brown powder, column granules | Black Shiny Flakes, 2-4mm Crystal, Fine Powder | Black Shiny Flakes, Fine Powder, Spherical Pellets |
| Primary Nutrient Content | Humic Acid (50%-70%), Organic Matter (>75%) | Humic Acid (60%-70%), $K_2O$ (8%-12%), Fulvic Acid | Humic Acid (50%-65%), $Na_2O$ (approx. 8%-10%) |
| Core Application Sectors | Soil amendment, compound fertilizer raw material, organic fertilizer base | Foliar spray, drip irrigation, fertigation, high-end organic farming | Aquaculture water purifier, feed additive, ceramic binder, wastewater treatment |
| Key Target Industries | Fertilizer factories, soil remediation projects | Agricultural input distributors, drip irrigation system operators, greenhouse farms | Shrimp/Fish farm supplies, animal feed mills, ceramic & battery manufacturers |
| Agricultural Safety | Safe for all soils and crops | Highly beneficial; supplements organic potassium without soil salinization | Caution needed for high-dosage crop soil application (risk of sodium accumulation) |
III. Industry Application Fields
The multifaceted chemical nature of humic acid derivatives allows broad deployment across agriculture, environmental protection, and heavy industry:
- Eco-Agriculture & Fertigation: Potassium Humate is widely applied through drip systems and foliar sprays to stimulate root development, enhance drought and salinity tolerance, reduce chemical fertilizer leaching, and improve fruit sweetness and yield.
- Soil Remediation & Conditioning: Raw humic acid restores degraded soil structure, increases cation exchange capacity (CEC), neutralizes soil pH, and immobilizes heavy metal pollutants in contaminated agricultural soils.
- Aquaculture & Water Management: Sodium Humate rapidly purifies aquaculture pond water by precipitating suspended organic matter, chelating heavy metal ions, shading out toxic filamentous algae, and stabilizing water pH levels.
- Animal Husbandry & Feed Additives: Feed-grade Sodium Humate acts as an intestinal mucosa protector, promoting nutrient absorption, improving livestock gut health, and reducing mortality in poultry and swine farming.
- Industrial & Environmental Uses: Sodium Humate serves as an effective fluid-loss control agent in oil drilling mud, a binder in ceramic mold production, a lead-acid battery plate expander, and an adsorbent in industrial wastewater treatment.
IV. China’s Core Industrial Clusters & Regional Origin Analysis
China accounts for over 70% of the global output of humic acid products. The supply chain is strategically distributed across major mineral-rich regions, each possessing distinct raw material qualities and product positioning:
1. Inner Mongolia Cluster (Ordos & Wuhai) — High-Purity & Export Standard Hub
- Origin Characteristics: Inner Mongolia possesses vast reserves of high-grade weathered coal characterized by high organic content, high humic acid purity, low heavy metal content, and low moisture.
- Industry Brief: Modernized, large-scale chemical factories are concentrated here, specialized in producing high-end Potassium Humate Shiny Flakes (ultra-low insoluble content for drip irrigation) and refined Sodium Humate. Blessed with abundant coal-chemical infrastructure, local manufacturers achieve unmatched batch consistency and massive production scale. It is the premier sourcing destination for high-end European, North American, and Australian agricultural importers.
2. Shanxi Industrial Belt (Datong & Xinzhou) — Cost-Effective & Fertilizer Base Hub
- Origin Characteristics: Shanxi is China’s traditional energy and coal capital. Its weathered coal features moderate-to-high humic acid content, abundant local chemical reagent supply (like caustic potash and caustic soda), and mature processing technology.
- Industry Brief: This region is renowned for ultra-competitive pricing and massive capacity for raw humic acid powders, humic acid granules, and standard-grade humic acid salts. Local suppliers excel at supplying large-volume agricultural fertilizer factories and bulk blend (BB) fertilizer manufacturers across South Asia, Southeast Asia, and Latin America.
3. Xinjiang Industrial Base (Changji & Hami) — Emerging Low-Defect & Ultra-High Capacity Belt
- Origin Characteristics: Xinjiang boasts exceptionally rich reserves of young lignite and weathered coal with high activity, dark color, and high water-solubility traits after reaction.
- Industry Brief: Benefiting from low energy costs and new automated processing facilities, Xinjiang has rapidly grown into a massive production base for Potassium Humate and Sodium Humate. Products from Xinjiang exhibit superior solubility and anti-hard-water performance. Its primary limitation lies in inland transport distances to ocean ports, which local suppliers overcome through optimized rail-sea multimodal logistics.
4. Shandong & Hebei Processing & Port Hubs
- Industry Brief: Located near major shipping ports (Qingdao and Tianjin), these regions house advanced deep-processing optical and chemical blending facilities. They purchase raw humic materials from Inner Mongolia and Shanxi to produce customized liquid formulations, complex humic-NPK fertilizers, and private-label packaged retail products for global clients with fast port shipment times.
V. Top 10 Chinese Humic Acid Manufacturers & Suppliers
To help international buyers navigate China’s vast supply landscape, below are 10 leading domestic humic acid manufacturers recognized for their production capacity, technological innovation, and export experience:
- 1. Xinjiang Shuanglong Humic Acid Co., Ltd. (新疆双龙腐植酸): Leveraging Xinjiang’s premium lignite resources, they excel in producing high-purity Potassium Humate flakes and fulvic acid derivatives with excellent solubility.
- 2. Shanxi Jinfeng Biotechnology Co., Ltd (山西晋丰腐植酸): Founded in 2012, Shanxi Jinfeng Biotechnology Co., Ltd is a technology-driven full-chain manufacturer of mineral humic acid fertilizers, supplying various organic & water-soluble fertilizers and providing soil test & formula technical services.
- 3. Shenyang Humate Technology Co., Ltd.: Humate is a Chinese manufacturer with over 20‑year export experience. Under its brands HUMINRICH, SOIMAX and HUMIKING, it supplies biostimulants, organic agro‑products and nutrition solutions for plants and animals, cooperating with global research institutes for sustainable agricultural innovation.Based near Qingdao port, specialized in bio-humic formulations, liquid humic fertilizers, and customized OEM blending for international brands.
- 4. Shanxi Huaxia Humic Acid Development Co., Ltd. (山西华夏腐植酸): One of the earliest established humic acid producers in Shanxi, providing stable raw humic powders and granules for global compound fertilizer plants.
- 5. Jiangxi Green Top Biological Technology Co., Ltd. (江西绿拓生物): Focuses on agricultural biostimulants, specialized Potassium Fulvate, and anti-hard-water Potassium Humate formulations for high-tech drip irrigation.
- 6. Ningxia Humate Biotechnology Co., Ltd. : Utilizing high-quality regional weathered coal to produce uniform humic acid granules and Potassium Humate crystal for broadacre agriculture.
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- 7. Hebei Humate Biotech Co., Ltd. (河北黑英生物): A leading cross-border supplier providing complete OEM solutions for organic fertilizers, Potassium Humate flakes, and fulvic acid powders.
- 8. Shanxi Linhai Humic Acid Technology Co., Ltd. (山西临海腐植酸): A key industry leader in Shanxi, specializing in large-scale extraction of mineral-sourced Potassium Humate, Fulvic Acid, and high-purity Sodium Humate for agricultural fertigation and industrial applications.
- 9. Beijing Humate China International Co., Ltd. (北京鼎天济农/Humate China): One of China’s pioneer export-oriented manufacturers and traders of humic acid salts, offering 100% water-soluble Potassium Humate shiny flakes, Sodium Humate, and customized organic fertilizer formulations worldwide.
- 10. Xinjiang Hami City Coal Chemical Co., Ltd. / Hami Humic Acid (哈密市腐植酸厂): Located in Xinjiang’s core mineral rich hub, they leverage premier young lignite resources to produce high-activity Humic Acid raw powders, Potassium Humate crystals, and water-treatment grade Sodium Humate.
VI. Customization Options (OEM & ODM Capabilities)
China’s advanced humic acid manufacturing ecosystem offers extensive OEM and ODM customization to meet specific regional agricultural and commercial requirements:
- Physical Form & Appearance Customization: Choice of 100% soluble shiny flakes (0.5mm-2mm), crystal granules (2mm-4mm), ultra-fine powder (80-300 mesh), or extruded column/spherical granules.
- Formula & Grade Tailoring: Custom adjustments for active Humic Acid content (50%-70%), Fulvic Acid content (10%-30%), $K_2O$ ratio (8%-12%), and special Anti-Hard-Water formulations (resistant up to 21°dH / 350 ppm).
- Private Label & Packaging Customization: Complete multi-language packaging services including 1kg/5kg/10kg colorful foil bags, 25kg PP/PE moisture-proof woven bags, 1000kg jumbo bags (FIBC), and custom palletizing.
VII. Relevant Certification and Compliance Requirements
Because humic acid products enter agricultural food chains and sensitive ecosystems, international customs and environmental agencies enforce strict quality and eco-compliance standards. Partnering with a compliant Chinese manufacturer ensures smooth customs clearance:
- ISO 9001 & ISO 14001: Validates standardized chemical quality control and environmentally compliant production workflows, including dust control and wastewater treatment.
- EU REACH Registration: Mandatory for importing humic acid derivatives (Humic acid, potassium salt / sodium salt) into the European Union in quantities exceeding 1 metric ton per year. Ensures full chemical safety compliance.
- OMRI Listed (Organic Materials Review Institute) / ECOCERT: Essential credentials for Potassium Humate products destined for certified organic farming markets in North America, Europe, and Latin America.
- Heavy Metal Compliance (ICP-MS Testing): Strict limits on Lead ($Pb$), Cadmium ($Cd$), Arsenic ($As$), and Mercury ($Hg$) to comply with national agricultural input standards (such as US EPA, EU Fertilizer Regulation, and Australian DAFF).
- COA & MSDS / SDS Documentation: Full Chemical Safety Data Sheets (GHS compliant) and accurate Certificates of Analysis verifying total humic acid content, water-insoluble matter, pH value, and moisture levels.
VIII. Precautions for Purchasing: Making an Informed B2B Decision
To avoid common quality issues such as nozzle-clogging insolubles or fake humic content, follow these critical inspection guidelines when sourcing from China:
- Verify Water Solubility and Anti-Hard-Water Performance:
For Potassium Humate used in drip irrigation, request real-time dissolution videos and lab tests. High-grade shiny flakes should achieve 100% solubility within 2 minutes without leaving residue. If your target market uses hard water, specify “Anti-Hard Water Grade” (resistant up to $21^\circ\text{dH}$ or $350\text{ ppm}$ hardness) to prevent precipitation. - Differentiate Testing Methods for Active Content:
Humic acid percentages vary widely depending on the test method (e.g., ISO, CDFA, California Method, or Colorimetric vs. Gravimetric). Always clarify with the factory which standard is used (e.g., California method yields lower numerical percentages than gravimetric methods for the same sample). - Check Physical Form & Anti-Caking Packaging:
Humic acid salts, especially Sodium Humate and Potassium Humate powder, are highly hygroscopic (absorb moisture easily). Ensure the supplier uses moisture-proof inner plastic liners (PE) inside heavy-duty woven bags, jumbo bags (FIBC), or customized retail boxes. - Request Heavy Metal & Insoluble Particle Lab Reports:
Insist on third-party SGS or Intertek pre-shipment inspections to verify heavy metal levels and mesh size (e.g., 80-100 mesh for powder, 100% pass through 200 mesh for liquid blending). - Evaluate Total Landed Costs & Shipping Specs:
Potassium Humate shiny flakes are lightweight yet bulky. Check pallet loading limits, container packing density (e.g., 12-14 MT per 20ft container with pallets, or 20-22 MT unpalletized), and FOB/CIF freight terms.
IX. Choose IMEXsourcing as Your Sourcing Partner for Humic Acid Products in China
Procuring high-purity humic acid, Potassium Humate, and Sodium Humate from China requires deep chemical knowledge, strict quality oversight, and local supply chain presence. IMEXsourcing serves as your trusted procurement partner in China, providing end-to-end supply chain management tailored for global agricultural and industrial buyers:
- Deep Regional Sourcing Expertise: IMEXsourcing maintains direct connections across China’s premier raw material hubs (Inner Mongolia, Shanxi, Xinjiang). We bypass trading middlemen and match your exact technical specifications directly with top-tier chemical manufacturers.
- Full-Scope OEM & ODM Management: We oversee custom formulation blending, particle size control, anti-hard-water upgrading, private label packaging design, and multi-language printing to align perfectly with your brand identity.
- Rigorous Factory Audits & Regulatory Vetting: Our local team conducts thorough on-site factory audits to verify ISO certifications, REACH compliance, environmental protection status, and raw material purity before contract signing.
- 100% Pre-Shipment Quality Control (QC): We execute strict lab testing prior to container loading—inspecting water solubility, insoluble residue percentage, heavy metal limits, moisture levels, and bag sealing to prevent caking during ocean transit.
- Logistics & Multimodal Freight Optimization: IMEXsourcing optimizes inland rail and sea logistics from inland bases (like Xinjiang and Inner Mongolia) to Qingdao/Tianjin ports, securing competitive shipping rates and ensuring fast delivery times.
X. Conclusion
Sourcing Humic Acid, Potassium Humate, and Sodium Humate from China offers massive commercial advantages for global fertilizer producers, agricultural distributors, and industrial buyers. By matching specific product forms (such as 100% soluble Potassium Humate flakes or aquaculture-grade Sodium Humate) with trusted regional manufacturing clusters like Inner Mongolia, Shanxi, and Xinjiang, importers can build highly profitable, sustainable product lines.
Partnering with an experienced local sourcing agent like IMEXsourcing eliminates international trade risks, prevents product quality defects, and streamlines factory negotiations, quality control, and global logistics—ensuring your business achieves sustained growth and market leadership.