AVA Chemicals [P] Ltd. Manufactures a range of Micronutrient which includes Potassium Humate. AVA Chemicals [P] Ltd. Is an ISO 9001:2000 certified company. Potassium Humate is a shining Black Crystalline powder. It is 85.0% Water Soluble in dry basis. It contains minimum 70% Humic acid and minimum 10.0% Potassium Oxide [K2O] in the dry base. Potassium Humate measures 8 - 10 in pH rating scale. Maximum Residues of 5.0%, bigger than 0.5 mm can be found within the Potassium Humate.