Fulvic acid

Fulvic acid (CAS 479-66-3), also marketed as Fulvic Minerals and abbreviated FA, is a low-molecular-weight humic fraction extracted from leonardite, shale, or composted organic matter.

Where is Fulvic acid used?

• Crop production: chelates micronutrients such as iron, zinc, and manganese, keeping them soluble and plant-available in soil and foliar spray formulations
• Fertilizer manufacturing: incorporated into liquid NPK blends and micronutrient concentrates to prevent nutrient lockout
• Water treatment: natural complexing agent that binds heavy metals and reduces their bioavailability in effluent streams
• Animal feed producers use FA as a supplement additive, where its chelating capacity supports mineral absorption in livestock nutrition programs.

Good to know: Product quality is often verified against humic substance standards such as those defined by the International Humic Substances Society.

Commercial specifications

• Potassium fulvate powder typically featuring 50 to 80 percent FA content