Humic Acid Potassium HA(dry basis): 65%min Water Soluble(Dry Basis): 95%min K2O(Dry Basis): 12%min Moisture: 20%max PH: 9.0--11.0. Description Humic acid potassium(HA-K) is an amorphous polymer aromatic-aliphatic hydroxyl carboxylate. It appears as black particle or powdery solid. It is the products reacted with KOH liquid after the careful election from the brown coal. It is soluble in water and alkaline. Storage Keep in sealed, dry and ventilated place. It won't deteriorate in long-term storage. Agglomeration and pulverization doesn't affect use after it` s dissolved. Usage Used as multi-functional compound fertilizer after combination with the elements of nitrogen and phosphorus, also used as soil ameliorator, plant growth stimulant and fertilizer efficiency promoter. 25KG/50KG net woven bag with lining film; according to customers' requirement.