Potassium Humate is Black powder or granular, soluble in water. potassium humateProperty: Potassium Humate is a high polymer heterogeneous aromatic hydroxy carboxylic acid salt. Black powder or granular, soluble in water and weak alkaline feature. It comprises active group hydroxy, carboxylic acid salt and nitro and so on.Specification:Potassium humate(water soluble)75%Min75% Min80% Min90% Min95% ...