otassium Humate is from natural leonardite.it''s black powder or crystal granular, soluble in water and weak alkaline, which perfectly combines humic acids and nutrients at different levels of availability. Humate is extracted from natural lignite or leonardite. It is organic chelator and microbial stimulator. Potassium Humate 85% Min. Humic acid in dry base: 55% Min. K2O:10% Min. Moisture: 15% Max. Ph Value: 9-11 Super Potassium Humate Water Solubility: 97-100% Humic acid in dry base: 60-65%. Fulvic acid:15% Min. K2O: 10-12% Misture:15%Max.