Physical & Chemical properties: Black powder Minimum guaranteed Ingredient: Humic acid(HA Dry basisú¬75%, Potassium ( K2O): 12% Water-solubility: 95% Moisture: í_15% PH value:10-11. Package: 1) Paper bags with PVC liner, 25kg net 2) Plastic woven bags with PVC liner, 25kg net or 50kg net Storage: In sealed and damp-proof place.