Boric Acid Powder 25KG Boric acid powder is a versatile compound used as an antiseptic for minor wounds, a powerful insecticide against pests (ants, roaches), an antifungal for athlete���s foot/yeast infections, a household cleaner/deodorizer/stain remover, and a flame retardant for wood. Industrially, it���s used in glass, ceramics, and leather, while agriculturally, it treats plant boron deficiency. Always handle with care…