Water soluble humic acid fertilizer manufacturers

Buyers should prioritize Humic Acid content (typically ≥60%) and Fulvic Acid content (typically ≥15%) for high-efficiency nutrient absorption. The water solubility rate must be ≥99% to prevent clogging in drip irrigation and fertigation systems. Additionally, check the pH value (usually 8-10 for potassium humate) and the moisture content (≤15%) to ensure product stability and ease of storage.

Request a Certificate of Analysis (COA) for every batch. Ensure the product meets ISO 9001:2015 quality management standards. For organic farming markets, verify if the supplier holds OMRI (Organic Materials Review Institute) or REACH (for EU markets) certifications. It is also recommended to conduct a jar test with a sample to observe the dissolution speed and check for any insoluble sediment.

This fertilizer is primarily used in drip irrigation, foliar spraying, and hydroponics. Its main functions include improving soil structure, enhancing cation exchange capacity (CEC), and increasing crop resistance to drought and salinity. In B2B contexts, it is often used as a synergist for NPK fertilizers to reduce leaching and improve nutrient uptake efficiency by up to 20-30%.

Since humic acid is often hygroscopic, it must be packed in multi-layer PP/PE bags with an inner plastic liner to prevent moisture absorption. For bulk sea freight, UV-resistant jumbo bags (500kg-1000kg) or standard 25kg bags on fumigated pallets are preferred. Storage should be in a cool, dry, and ventilated warehouse away from direct sunlight and incompatible oxidizing agents.

The most significant risks include adulteration with low-grade coal dust and heavy metal contamination (Lead, Cadmium, Arsenic). To mitigate this, always use third-party inspection services like SGS or Intertek at the loading port to verify the chemical composition before final payment. Ensure the supplier is a verified manufacturer on Made-in-China.com to avoid trading scams.

Pricing for humic acid is highly sensitive to raw material (leonardite) costs. Negotiate based on active ingredient concentration rather than just gross weight. For new buyers, suggest a trial order of 1-5 tons before moving to full container loads (FCL). Volume-based discounts of 5-10% are common when moving from LCL to FCL (20-25 tons).

Fertilizers may be classified as non-hazardous chemicals, but you must provide a Material Safety Data Sheet (MSDS) and a Certificate for Safe Transport of Chemical Goods. Check your local Ministry of Agriculture registration requirements, as many countries require a Product Registration Certificate before the goods can clear customs. For shipping, FOB (Free On Board) is recommended for buyers with their own freight forwarders to better control costs.

Utilize Secured Trading Services provided by platforms like Made-in-China.com to protect your payment until the goods are shipped. Use Letter of Credit (L/C) for large-scale transactions or Telegraphic Transfer (T/T) with a 30% deposit and 70% against the Bill of Lading (B/L) copy. Avoid sending full payments to private bank accounts.