Florida Laboratories Boric Acid Pure Fine Granular Powder 1 Lb.Create Your own Solution. 100 Household Uses One (1 Pound)1 Lb. Pure Granular Boric Acid (H3BO3) 99.9+% Purity Also called: Orthoboric Acid, Acidum Boricum, Boracic Acid Flame Retardant and Anti-fungal.