Water Soluble Humic Acid from Leonardite Product Types: Humic Acid F1500 F50 F30 ITEM F1500 F50 F30 Fulvic Acid (dry basis) 15% min 5% min 3% min Humic Acid (dry basis) 70% min 60% min 55% min K₂O 12% min 10% min 10% min Dissolving Capacity (In 20°C water) 200g/L 200g/L 200g/L pH 9-11 9-11 9-11 Solubility 99.50% 95.00% 95.00% Appearance Black Flakes/Powder/Crystal/Granule ... https://wescochemicalscompany.com/product/humic-acid/