Standard: No. ITEM STANDARD 1 Appearance Powder/Flakes/Crystal 2 Color Super Shiny Black 3 Solubility 99% 4 Humic acid(Dry basis) 80%min. 5 K2O(Dry basis) 10%min. 6 Moisture 15%max 7 PH Value 8-10 8 Water insoluble 1%max. Usage: --Agriculture It combined with theplant available ...