This is one pound of potassium persulfate which is also known as potassium peroxydisulfate. A white, crystalline solid having a density of 2.47, soluble in water. Uses include - oxidizing agent, bleaching agent, reducing agent in photography, antiseptic, etchant, electroplating, preserving food, soap manufacture, analytical reagent, polymerization promoter, pharmaceuticals, modification of starch, flour-maturing agent, and desizing in textiles. This material is shipped compliance with USPS Publication 52 as an ORM-D. Shipping .90