Potassium humate specification: Appearance: Black powder Water Solubility(dry basis): 80%min Humic Acid(dry basis): 60%min Potassium(K2O dry basis): 10%min Moisture: 15%max pH: 9-11 Sieve residue(0.5mm): 5%max. Woven bags with lining 25kgs net weight, also can satisfy the customer's requirement.