Sodium Humate is the salt of humic acid. It is manufactured commercailly by alkaline extraction of brown coal (lignite) Leonardite to be used mainly as a soil conditioner. The extraction is performed in water with the addition of potassium hydroxide (NaOH), sequestering agents and hydrotropic surfactants. Appearance: powder/flake/granule Size: 80mesh/3-6mm/1-3mm Humic Acid: 40%/50%/55%/60%/70% Water Solubility: 60%/65%/70%/85%/98% Moisture: 15% Packaging: 25kg/kraft paper bag or customized